Search

Background: Preterm birth (before 37 completed weeks of gestation) is associated with an increased risk of adverse health and developmental outcomes relative to birth at term. Existing guidelines for data collection in cohort studies of individuals born preterm are either limited in scope, have not been developed using formal consensus methodology, or did not involve a range of stakeholders in their development. Recommendations meeting these criteria would facilitate data pooling and harmonisation across studies. Objectives: To develop a Core Dataset for use in longitudinal cohort studies of individuals born preterm. Methods: This work was carried out as part of the RECAP Preterm project. A systematic review of variables included in existing core outcome sets was combined with a scoping exercise conducted with experts on preterm birth. The results were used to generate a draft core dataset. A modified Delphi process was implemented using two stages with three rounds each. Three stakeholder groups participated: RECAP Preterm project partners; external experts in the field; people with lived experience of preterm birth. The Delphi used a 9‐point Likert scale. Higher values indicated greater importance for inclusion. Participants also suggested additional variables they considered important for inclusion which were voted on in later rounds. Results: An initial list of 140 data items was generated. Ninety‐six participants across 22 countries participated in the Delphi, of which 29% were individuals with lived experience of preterm birth. Consensus was reached on 160 data items covering Antenatal and Birth Information, Neonatal Care, Mortality, Administrative Information, Organisational Level Information, Socio‐economic and Demographic information, Physical Health, Education and Learning, Neurodevelopmental Outcomes, Social, Lifestyle and Leisure, Healthcare Utilisation and Quality of Life. Conclusions: This core dataset includes 160 data items covering antenatal care through outcomes in adulthood. Its use will guide data collection in new studies and facilitate pooling and harmonisation of existing data internationally. [ABSTRACT FROM AUTHOR]

Aim: The associations between the aetiology of preterm birth and later neurodevelopmental outcomes are unclear. A systematic review and meta‐analysis examined the existing evidence. Methods: The PubMed and Embase databases were searched for papers published in English from inception to 16 December 2020. We included original papers on the causes of preterm birth and the risks of cerebral palsy (CP) and suboptimal cognitive development. Two reviewers independently evaluated the studies and extracted the data. Results: The literature search yielded 5472 papers and 13 were selected. The aetiology of preterm birth was classified under spontaneous or medically indicated delivery. A meta‐analysis was performed, comprising 104 902 preterm infants from 11 papers on CP. Preterm infants born after a medically indicated delivery had a lower CP risk than infants born after spontaneous delivery, with a pooled odds ratio of 0.59 (95% confidence interval 0.40–0.86). This result was robust in the subgroup and sensitivity analyses. Cognitive development was reported in three papers, which suggested that worse outcomes were associated with medically indicated deliveries. Conclusion: The aetiology of preterm delivery may contribute to the risk of CP and cognitive delay. Further research is needed, using individual‐level meta‐analyses to adjust for possible confounders, notably gestational age. [ABSTRACT FROM AUTHOR]

Aim: We examined the outcomes of using inhaled nitric oxide (iNO) to treat very preterm born (VPT) infants across Europe. Methods: This was a sub‐study of the Screening to Improve Health in Very Preterm Infants in Europe research. It focused on all infants born between 22 + 0 and 31 + 6 weeks/days of gestation from 2011 to 2012, in 19 regions in 11 European countries. We studied 7268 infants admitted to neonatal care and 5 years later, we followed up the outcomes of 103 who had received iNO treatment. They were compared with 3502 propensity score‐matched controls of the same age who did not receive treatment. Results: All countries used iNO and 292/7268 (4.0%) infants received this treatment, ranging from 1.2% in the UK to 10.5% in France. There were also large regional variations within some countries. Infants treated with iNO faced higher in‐hospital mortality than matched controls (odds ratio 2.03, 95% confidence interval 1.33–3.09). The 5‐year follow‐up analysis of 103 survivors showed no increased risk of neurodevelopmental impairment after iNO treatment. Conclusion: iNO was used for VPT patients in all 11 countries. In‐hospital mortality was increased in infants treated with iNO, but long‐term neurodevelopmental outcomes were not affected in 103 5‐year‐old survivors. [ABSTRACT FROM AUTHOR]

Objective: To assess changes in caesarean section (CS) rates in Europe from 2015 to 2019 and utilise the Robson Ten Group Classification System (TGCS) to evaluate the contribution of different obstetric populations to overall CS rates and trends. Design: Observational study utilising routine birth registry data. Setting: A total of 28 European countries. Population: Births at ≥22 weeks of gestation in 2015 and 2019. Methods: Using a federated model, individual‐level data from routine sources in each country were formatted to a common data model and transformed into anonymised, aggregated data. Main Outcome Measures: By country: overall CS rate. For TGCS groups (by country): CS rate, relative size, relative and absolute contribution to overall CS rate. Results: Among the 28 European countries, both the CS rates (2015, 16.0%–55.9%; 2019, 16.0%–52.2%) and the trends varied (from −3.7% to +4.7%, with decreased rates in nine countries, maintained rates in seven countries (≤ ± 0.2) and with increasing rates in 12 countries). Using the TGCS (for 17 countries), in most countries labour induction increased (groups 2a and 4a), whereas multiple pregnancies (group 8) decreased. In countries with decreasing overall CS rates, CS tended to decrease across all TGCS groups, whereas in countries with increasing rates, CS tended to increase in most groups. In countries with the greatest increase in CS rates (>1%), the absolute contributions of groups 1 (nulliparous term cephalic singletons, spontaneous labour), 2a and 4a (induction of labour), 2b and 4b (prelabour CS) and 10 (preterm cephalic singletons) to the overall CS rate tended to increase. Conclusions: The TGCS shows varying CS trends and rates among countries of Europe. Comparisons between European countries, particularly those with differing trends, could provide insight into strategies to reduce CS without clinical indication. [ABSTRACT FROM AUTHOR]

Aim: To measure the association between cerebral palsy (CP) and non‐CP‐related movement difficulties and health‐related quality of life (HRQoL) among 5‐year‐old children born extremely preterm (<28 weeks gestational age). Method: We included 5‐year‐old children from a multi‐country, population‐based cohort of children born extremely preterm in 2011 to 2012 in 11 European countries (n = 1021). Children without CP were classified using the Movement Assessment Battery for Children, Second Edition as having significant movement difficulties (≤5th centile of standardized norms) or being at risk of movement difficulties (6th–15th centile). Parents reported on a clinical CP diagnosis and HRQoL using the Pediatric Quality of Life Inventory. Associations were assessed using linear and quantile regressions. Results: Compared to children without movement difficulties, children at risk of movement difficulties, with significant movement difficulties, and CP had lower adjusted HRQoL total scores (β [95% confidence interval] = −5.0 [−7.7 to −2.3], −9.1 [−12.0 to −6.1], and − 26.1 [−31.0 to −21.2]). Quantile regression analyses showed similar decreases in HRQoL for all children with CP, whereas for children with non‐CP‐related movement difficulties, reductions in HRQoL were more pronounced at lower centiles. Interpretation: CP and non‐CP‐related movement difficulties were associated with lower HRQoL, even for children with less severe difficulties. Heterogeneous associations for non‐CP‐related movement difficulties raise questions for research about mitigating and protective factors. This original article is commented on by Evensen on pages 1546–1547 of this issue. [ABSTRACT FROM AUTHOR]

The article discusses the use of growth charts for identifying fetuses and newborns at risk due to suboptimal growth. It highlights the debate surrounding the choice and performance of intrauterine growth charts and presents a study that compares different charts in their ability to identify infants with severe neonatal morbidity. The study finds that all charts perform poorly at predicting severe neonatal morbidity, but emphasizes the need to consider realistic expectations when interpreting these results. The article also discusses the challenges in selecting appropriate outcomes for evaluating the predictive value of growth charts and the importance of validating charts to ensure they fit the population. Overall, the study provides important knowledge about the risks associated with birthweight and can inform preventive action and international comparisons. [Extracted from the article]

Aim: To assess the predictive validity of parent‐reported gross motor impairment (GMI) at age 2 years to detect significant movement difficulties at age 5 years in children born extremely preterm. Method: Data were from 556 children (270 males, 286 females) born at less than 28 weeks' gestation in 2011 to 2012 in 10 European countries. Parent report of moderate/severe GMI was defined as walking unsteadily or unable to walk unassisted at 2 years corrected age. Examiners assessed significant movement difficulties (score ≤ 5th centile on the Movement Assessment Battery for Children, Second Edition) and diagnoses of cerebral palsy (CP) were collected by parent report at 5 years chronological age. Results: At 2 years, 66 (11.9%) children had moderate/severe GMI. At 5 years, 212 (38.1%) had significant movement difficulties. Parent reports of GMI at age 2 years accurately classified CP at age 5 years in 91.0% to 93.2% of children. Classification of moderate/severe GMI at age 2 years had high specificity (96.2%; 95% confidence interval 93.6–98.0) and positive predictive value (80.3%; 68.7–89.1) for significant movement difficulties at age 5 years. However, 74.5% of children with significant movement difficulties at 5 years were not identified with moderate/severe GMI at age 2 years, resulting in low sensitivity (25.1%; 19.4–31.5). Interpretation: This questionnaire may be used to identify children born extremely preterm who at age 2 years have a diagnosis of CP or movement difficulties that are likely to have a significant impact on their functional outcomes at age 5 years. [ABSTRACT FROM AUTHOR]

Objective: To assess whether standardised longitudinal reporting of growth monitoring information improves antenatal detection of infants who are small for gestational age (SGA), compared with usual care. Design: Cluster‐randomised controlled trial. Setting: Sixteen French level‐3 units in 2018–2019. Population: Singleton pregnancies. Methods: The intervention consisted of the serial plotting of symphysis–fundal height (SFH) and estimated fetal weight (EFW) measurements on customised growth charts using a software program, compared with standard antenatal care. We estimated relative risks (RR) adjusted for known risk factors for fetal growth restriction (FGR). Main Outcome Measures: The primary outcome was antenatal detection of FGR among SGA births (with birthweights below the tenth centile of French customised curves), defined as the mention of suspected FGR in medical records and either referral ultrasounds for growth monitoring or indicated delivery for FGR. Secondary outcomes were false‐positive rates, mode of delivery, perinatal morbidity and mortality, and number of antenatal visits and ultrasounds. Results: In total, seven intervention clusters (n = 4349) and eight control clusters (n = 4943) were analysed, after the exclusion of one intervention centre for a major deviation in protocol. SGA births represented 613 (14.1%) and 626 (12.7%) of all births, respectively. The rates of antenatal detection of FGR among SGA births were 40.0% in the intervention arm versus 37.1% in the control arm (crude RR 1.08, 95% CI 0.87–1.34; adj RR 1.09, 95% CI 0.88–1.35). No benefits of the intervention were detected in the analyses of secondary outcomes. Conclusions: Serial plotting of SFH and EFW measurements on customised growth charts did not improve the antenatal detection of FGR among SGA births. Linked article: This article is commented on by Kiserud, pp. 740 in this issue. To view this mini commentary visit https://doi.org/10.1111/1471‐0528.17416. [ABSTRACT FROM AUTHOR]

Introduction: Research on maternal prepregnancy weight suggests adiposity is associated with dysfunctional labor, but knowledge about how gestational weight gain (GWG) affects labor is sparse. Our objective was to evaluate associations between GWG adequacy and intrapartum obstetric interventions (oxytocin administration; cesarean section) necessitated by labor dysfunction. Material and methods: Using national, population‐based French National Perinatal Survey 2016 data, we included term cephalic singleton pregnancies involving trial of labor (n = 9724). For the intrapartum oxytocin administration analysis, we included only women with spontaneous labor (n = 7352). GWG was calculated as the difference between end of pregnancy and prepregnancy weight (both self‐reported) and categorized as insufficient, adequate (reference group), or excessive by prepregnancy body mass index (BMI; underweight <18.5, normal weight 18.5–24.9, overweight 25–29.9, obese ≥30 kg/m2) using the 2009 Institute of Medicine thresholds. Multilevel generalized estimating equation logistic regression models, unadjusted and adjusted for a priori confounders, evaluated intervention‐GWG adequacy associations within BMI categories (under/normal weight combined), stratified by parity (primiparas; multiparas). Results: GWG adequacy was associated with oxytocin use among under/normal weight women (primiparas: insufficient 57.3%, adequate 60.8%, excessive 65.0%, p = 0.014; multiparas: insufficient 27.2%, adequate 29.1%, excessive 36.2%, p < 0.001) and overweight primiparas (insufficient 56.0%, adequate 58.7%, excessive 72.5%, p = 0.002). In unadjusted and adjusted models, trends of increased odds of oxytocin administration among women with excessive GWG were found regardless of parity and prepregnancy BMI. Similarly, among under/normal weight women, GWG adequacy was associated with intrapartum cesarean section (primiparas: insufficient 10.7%, adequate 12.7%, excessive 15.3%, p = 0.014; multiparas: insufficient 3.1%, adequate 3.5%, excessive 6.3%, p < 0.001) with increased cesarean section among multiparas with excessive GWG persisting in adjusted models (adjusted odds ratio 1.9, 95% confidence interval 1.3–2.7). However, intrapartum cesarean section was reduced among multiparas with overweight and obese prepregnancy BMI and excessive GWG. Conclusions: Excessive GWG was associated with intrapartum oxytocin administration, regardless of parity or prepregnancy BMI, and cesarean section among women with under/normal weight prepregnancy BMI, providing evidence for benefits of healthy GWG for normal labor progression. Additional research is needed to verify our findings and understand differences by BMI. [ABSTRACT FROM AUTHOR]

Background: Meta‐analyses of the voluminous scientific literature on the impact of very preterm (VPT, <32 weeks' gestation) birth on cognition find a marked deficit in intelligence quotient (IQ) among children born VPT relative to term‐born peers, but with unexplained between‐study heterogeneity in effect size. Objectives: To conduct an umbrella review to describe the design and methodology of primary studies and to assess whether methodological heterogeneity affects the results of meta‐analyses. Data Sources: Primary studies from five systematic reviews with meta‐analysis on VPT birth and childhood IQ. Study Selection and Data Extraction: Information on study design, sample characteristics and results was extracted from studies. Study features covered study type, sample size, follow‐up rates, adjustment for social context, management of severe impairments and test type. Synthesis: We used random‐effects subgroup meta‐analyses and meta‐regressions to investigate the contribution of study features to between‐study variance in standardised mean differences (SMD) in IQ between groups. Results: In 58 cohorts (56%), children with severe impairments were excluded, while 23 (22%) cohorts accounted for social factors. The least reported feature was the follow‐up rate (missing in 38 cohorts). The largest difference in SMDs was between studies using full scale IQ tests (61 cohorts, SMD −0.89, 95% CI −0.96, −0.82) versus short‐form tests (27 cohorts, SMD −0.68, 95% CI −0.79, −0.57). The proportion of between‐study variance explained by the type of test was 14%; the other features explained less than 1% of the variance. Conclusions: Study design and methodology varied across studies, but most of them did not affect the variance in effect size, except the type of cognitive test. Key features, such as the follow‐up rate, were not consistently reported limiting the evaluation of their potential contribution. Incomplete reporting limited the evaluation of the full impact of this methodological diversity. [ABSTRACT FROM AUTHOR]

The objective of this paper is to describe gestational weight gain (GWG), to assess the applicability of the 2009 Institute of Medicine (IOM) guidelines, and to derive a GWG adequacy classification within a French cohort. We included twins from the national, prospective, population‐based JUmeaux MODe d'Accouchement (JUMODA) cohort study (2014–2015). Following the IOM approach, we selected a 'standard' population of term pregnancies with 'optimal' birthweight (≥2500 g; n = 2562). GWG adequacy (insufficient; adequate; excessive) was defined using IOM recommendations (normal body mass index [BMI]: 16.8–24.5 kg [also utilized for underweight BMI]; overweight: 14.1–22.7 kg; obese: 11.4–19.1 kg). Additionally, using the IOM approach, we determined the 25th and 75th percentiles of GWG in our standard population to create a JUMODA‐derived GWG adequacy classification. GWG and GWG adequacy were described, overall and by BMI and parity. In the JUMODA standard population of term twin livebirths with optimal birthweight, mean GWG was 16.1 kg (standard deviation 6.3). Using IOM recommendations, almost half (46.5%) of the women had insufficient and few (10.0%) had excessive GWG, with similar results regardless of BMI or parity. The 25th and 75th percentiles of GWG in the JUMODA standard population (underweight: 13–21 kg; normal weight: 13–20 kg; overweight: 11–19 kg; obese: 7–16 kg) were lower than the IOM recommendations. The IOM recommendations classified a relatively high percentage of French women as having insufficient and a low percentage as having excessive GWG. Additional research to evaluate recommendations in relation to adverse perinatal outcomes is needed to determine whether the IOM recommendations or the JUMODA‐derived classification is more appropriate for French twin gestations. Key messages: Using the 2009 Institute of Medicine (IOM) recommendations to define gestational weight gain (GWG) adequacy in our French cohort classified almost half of women as having insufficient GWG and a relatively low percentage as having excessive GWG.The USA‐derived IOM definition for adequate GWG may not apply in France or in other non‐USA, contemporary obstetric populations.Additional research in large, population‐based contemporary cohorts with prospective GWG ascertainment and assessment of GWG adequacy classifications in relation to adverse outcomes is needed to inform evidence‐based GWG recommendations for twin pregnancies. [ABSTRACT FROM AUTHOR]

Background: Meta-analyses of studies on very preterm (VPT) birth and childhood cognition select primary studies using gestational age inclusion criteria only, while others also include birthweight criteria. The consequences of this choice are unknown.Objective: The objective of this study was to describe the gestational age (GA) and birthweight (BW) criteria used in studies of VPT birth and cognition and to investigate whether meta-analysis results differ based on these criteria.Data Sources: Five systematic reviews on VPT birth and childhood IQ.Study Selection and Data Extraction: Country, birth years, GA-BW selection criteria and participant IQ were extracted from 156 studies representing 103 birth cohorts.Synthesis: Pooled standardised mean differences (SMD) in IQ between children born VPT and term-born controls were estimated by sub-group based on GA-BW criteria (GA, BW and GA-BW combined) and degree of preterm birth-low birthweight combinations: extremely preterm (EPT, <28 weeks) and extremely low BW (ELBW, <1000 g); VPT (<32 weeks) and very low BW (VLBW, <1500 g); and moderately MPT (<34 weeks) and moderately low BW (MLBW, <1800 g).Results: Cohorts used 27 distinct GA-BW inclusion criteria. Most common criteria were BW <1500 g (24 cohorts), BW <1000 g (12), GA <32 weeks (12) and GA <33 weeks (12); 23 studies used GA-BW combinations. BW-only criteria were more frequent in North America than Europe (63% versus 24%) and for cohorts before than after 1990 (67% vs 26%). Pooled SMD in IQ varied: SMDEPT/ELBW -0.94, 95% confidence interval [CI] -1.07, -0.82; SMDVPT/VLBW -0.78, 95% CI -0.85, -0.71; SMDMPT/MLBW -0.68, 95% CI -0.79, -0.57; however, there was no difference in SMD across cohorts using BW compared to GA criteria after adjustment on risk group.Conclusions: These findings support the inclusion of studies using GA and/or BW criteria in meta-analyses on VPT birth and cognition to increase the geographical and temporal generalisability of the results and to allow investigation of the impact of the heterogeneous inclusion criteria in this literature on outcomes. [ABSTRACT FROM AUTHOR]

Aim: To (1) determine the proportion of 5‐year‐old children born extremely preterm (EPT) with movement difficulties including cerebral palsy (CP) and the proportion of these children receiving motor‐related health care (MRHC), and (2) describe factors associated with receiving MRHC. Method: Children born before 28 weeks' gestation in 2011 to 2012 in 11 European countries were assessed with the Movement Assessment Battery for Children, Second Edition (MABC‐2) at 5 years of age. Information on family characteristics, child health including CP diagnosis, and health care use were collected using parent‐report questionnaires. MRHC was defined as visits in the previous year with health care providers (physical and occupational therapists) specialized in assessing/treating motor problems. We analysed receipt of MRHC and associated factors among children at risk of movement difficulties (MABC‐2 score 6th–15th centiles), with significant movement difficulties (SMD; ≤5th centile) or with CP. Results: Of 807 children assessed at 5 years 7 months (SD 4 months; 4 years 7 months–7 years 1 month), 412 were males (51.1%), 170 (21.1%) were at risk of movement difficulties, 201 (24.9%) had SMD, and 92 (11.4%) had CP. Those who received MRHC comprised 89.1% of children with CP, 42.8% with SMD, and 25.9% at risk of movement difficulties. MRHC for children with SMD varied from 23.3% to 66.7% between countries. Children were more likely to receive MRHC if they had other developmental problems or socioemotional, conduct, or attention difficulties. Interpretation: Efforts are needed to increase MRHC for 5‐year‐old children born EPT with movement difficulties. What this paper adds: Children born extremely preterm without cerebral palsy frequently experienced motor difficulties.Most of these children were not receiving motor‐related health care (MRHC).Large geographical differences throughout Europe were observed in receipt of MRHC.Socioemotional problems were related to MRHC use. [ABSTRACT FROM AUTHOR]

In a cohort of children born very preterm (VPT), we investigated the association between breast milk feeding (BMF) initiation and its duration on cognitive development at 2 years of corrected age. Data were obtained from the Effective Perinatal Intensive Care in Europe population‐based prospective cohort of children born <32 weeks of gestation, in 11 European countries, in 2011–2012. The study sample included 4323 children. Nonverbal cognitive ability was measured applying the Parental Report of Children's Abilities, except for France where the problem‐solving domain of the Ages & Stages Questionnaire was used. Verbal cognition was based on the number of words the child could say. To determine the association between BMF (mother's own milk) and nonverbal and verbal cognition (outcome categorized as optimal and suboptimal), adjusted risk ratios (aRRs) were estimated fitting Poisson regression models, with inverse probability weights to account for nonresponse bias. Overall, 16% and 11% of the children presented suboptimal nonverbal and verbal cognition, respectively. Never BMF was associated with a significantly increased risk for suboptimal nonverbal (aRR = 1.29, 95% confidence interval [CI] = 1.09–1.53) and verbal (aRR = 1.45, 95% CI = 1.09–1.92) cognitive development compared with those ever breastfed, after adjustment for perinatal and sociodemographic characteristics. Compared with children breastfed 6 months or more, children with shorter BMF duration exhibited a statistically nonsignificant elevated aRR. VPT children fed with breast milk had both improved nonverbal and verbal cognitive development at 2 years in comparison with never breastfed, independently of perinatal and sociodemographic characteristics. This study encourages targeted interventions to promote BMF among these vulnerable children. Key messages: In a European cohort of children born very preterm, 16% and 11% presented suboptimal nonverbal and verbal cognitive development, respectively.Never‐breastfed children faced a higher risk of having suboptimal nonverbal and verbal cognition at 2 years of corrected age when compared with those who were breastfed, independently of perinatal and sociodemographic characteristics.Breastfeeding support is a modifiable factor regardless of perinatal and sociodemographic characteristics, which reinforces the importance of specifically targeted interventions to protect, promote and support breast milk feeding in neonatal intensive care units and after discharge. [ABSTRACT FROM AUTHOR]

Introduction: Customized intrauterine growth charts are widely used for growth monitoring and research. They are based on three assumptions: (1) estimated fetal weight (EFW) has a normal distribution with a constant coefficient of variation at all gestational ages; (2) Hadlock's growth curve accurately describes the relation between EFW and gestational ages; (3) associations between EFW and the fetal and maternal characteristics included in the customization model (fetal sex, pre‐pregnancy weight, height, parity) are proportional throughout pregnancy. The aim of this study was to test whether these underlying assumptions are verified. Material and methods: Data came from (1) the French Longitudinal Study of Children (ELFE) cohort, which recruited births after 32 weeks' gestation in 349 maternity hospitals in France in 2011, and (2) the National Perinatal Survey, which included births from all French maternity hospitals in 2016. The study population included, respectively, 6 920 and 8 969 singleton non‐malformed term live births with data on customization characteristics and EFW. We computed the coefficient of variation by gestational age and then modeled the association of gestational age, maternal and fetal characteristics with EFW at the second and third trimester ultrasound and with birthweight using linear regression. To assess the proportionality of the impact of maternal and fetal characteristics, we computed the percent change in weight associated with these characteristics at these three time points. Results: The coefficient of variation was close to 12% at each gestational age, but EFW was not normally distributed, leading to small but systematic underestimation of fetuses under the 10th percentile. Weights representing the 50th and 10th percentiles based on Hadlock's growth trajectory were lower than observed or predicted weights. Most characteristics more strongly impacted weight at birth than during pregnancy. In the French Longitudinal study of Children (ELFE) cohort, boys were 1.8% (95% confidence interval [CI] 1.3–2.4) heavier than girls in the third trimester, whereas this percentage was 4.6% (95% CI 4.0–5.2) at birth. In the National Perinatal Survey, these percentages were 2.3% (95% CI 1.8–2.8) and 4.3% (95% CI 3.8–4.8). Conclusions: These results from two independent sources revealed discrepancies between routine clinical EFW data used for growth monitoring and the customized growth model's assumptions. [ABSTRACT FROM AUTHOR]

The pandemic has highlighted other time challenges, including the possibility of greater left truncation bias due to pandemic-related early losses, or immortal time, when assessing risks associated with infection at delivery only. The temporal dimension of research on the COVID-19 pandemic and pregnancy outcomes poses multiple challenges for perinatal epidemiologists. The challenges of time for studies on the population effects of the COVID-19 pandemic on perinatal outcomes. [Extracted from the article]

Background: Measuring infant health at birth is key for surveillance and research in obstetrics and neonatology, but there is no international consensus on morbidity indicators. The Neonatal Adverse Outcome Indicator (NAOI) is a composite indicator, developed in Australia, which measures the burden of severe neonatal morbidity using hospital discharge data. Objective: To evaluate the applicability of the NAOI in France for surveillance and research. Methods: We constituted a cohort of live births ≥24 weeks' gestational age in Metropolitan France from 2014 to 2015 using hospital discharge, insurance claims and cause of death data. Outlier hospitals were identified using funnel plots of standardised morbidity ratios (SMR), and their coding patterns were assessed. We compared the NAOI and its component codes with published Australian and English data and estimated unadjusted and adjusted risk ratios for known risk factors for neonatal morbidity. Results: We included 1,459,123 births (511 hospitals). Twenty‐eight hospitals had SMR above funnel plot control limits. Newborns with NAOI morbidities in these hospitals had lower mortality and shorter stays than in other hospitals. Amongst within‐limit hospitals, NAOI prevalence was 4.8%, comparable to Australia (4.6%) and England (5.4%). Most individual components had a similar prevalence, with the exception of respiratory support, intravenous fluid procedures and infection. NAOI was lowest at 39 weeks (2.2%) with higher risks for maternal age ≥40 (relative risk [RR] 1.47, 95% confidence interval [CI] 1.42, 1.51), state medical insurance (RR 1.60, 95% CI 1.52, 1.68), male sex (RR 1.21, 95% CI 1.19, 1.23) and birthweight <3rd percentile (RR 4.60, 95% CI 4.51, 4.69). Conclusions: The NAOI provides valuable information on population prevalence of severe neonatal morbidity and its risk factors. Whilst the prevalence was similar in high‐income countries with comparable neonatal mortality levels, ensuring valid comparisons between countries and hospitals will require further work to harmonize coding procedures, especially for infection and respiratory morbidity. [ABSTRACT FROM AUTHOR]

Aim: We investigated the timing of survival differences and effects on morbidity for foetuses alive at maternal admission to hospital delivered at 22 to 26 weeks' gestational age (GA). Methods: Data from the EXPRESS (Sweden, 2004–07), EPICure‐2 (England, 2006) and EPIPAGE‐2 (France, 2011) cohorts were harmonised. Survival, stratified by GA, was analysed to 112 days using Kaplan‐Meier analyses and Cox regression adjusted for population and pregnancy characteristics; neonatal morbidities, survival to discharge and follow‐up and outcomes at 2–3 years of age were compared. Results: Among 769 EXPRESS, 2310 EPICure‐2 and 1359 EPIPAGE‐2 foetuses, 112‐day survival was, respectively, 28.2%, 10.8% and 0.5% at 22–23 weeks' GA; 68.5%, 40.0% and 23.6% at 24 weeks; 80.5%, 64.8% and 56.9% at 25 weeks; and 86.6%, 77.1% and 74.4% at 26 weeks. Deaths were most marked in EPIPAGE‐2 before 1 day at 22–23 and 24 weeks GA. At 25 weeks, survival varied before 28 days; differences at 26 weeks were minimal. Cox analyses were consistent with the Kaplan‐Meier analyses. Variations in morbidities were not clearly associated with survival. Conclusion: Differences in survival and morbidity outcomes for extremely preterm births are evident despite adjustment for background characteristics. No clear relationship was identified between early mortality and later patterns of morbidity. [ABSTRACT FROM AUTHOR]

Background: Regionalisation programmes aim to ensure that very preterm infants are born in level III units (inborn) through antenatal referral or transfer. Despite widespread knowledge about better survival without disability for inborn babies, 10%‐30% of women deliver outside these units (outborn). Objective: To investigate risk factors associated with outborn deliveries and to estimate the proportion that were probably or possibly avoidable. Methods: We used a national French population‐based cohort including 2205 women who delivered between 24 and 30+6 weeks in 2011. We examined risk factors for outborn delivery related to medical complications, antenatal care, sociodemographic characteristics and living far from a level III unit using multivariable binomial regression. Avoidable outborn deliveries were defined by pregnancy risk (obstetric history, antenatal hospitalisation) and time available for transfer. Results: 25.0% of women were initially booked in level III, 9.1% were referred, 49.8% were transferred, and 16.1% had outborn delivery. Risk factors for outborn delivery were gestational age <26 weeks (adjusted relative risk (aRR) 1.37, 95% confidence interval (CI) 1.13, 1.66), inadequate antenatal care (aRR 1.39, 95% CI 1.10, 1.81), placental abruption (aRR 1.66, 95% CI 1.27, 2.17), and increased distance to the closest level III unit ((aRR 2.79, 95% CI 2.00, 3.92) in the 4th versus 1st distance quartile). Among outborn deliveries, 16.7% were probably avoidable, and 25.6% possibly avoidable, which could increase the proportion of inborn deliveries between 85.9% and 92.9%. Avoidable outborn deliveries were mainly associated with gestational age, intrauterine growth restriction, preterm premature rupture of membranes, and haemorrhage, but not distance. Conclusions: Our study identified some modifiable risk factors for outborn delivery; however, when regionalised care relies heavily on antenatal transfer, as it does in France, only some outborn deliveries may be prevented. Earlier referral of high‐risk women will be needed to achieve full access to tertiary care. [ABSTRACT FROM AUTHOR]

Advances in perinatal medicine in high-income countries have resulted in a significant reduction in mortality for infants born very preterm (<32 weeks gestation), such that most now survive. These results are in line with those from the study by Zayegh et al.1 showing trends in extremely low birthweight outcomes over four decades in Australia were concordant with investigations in later cohorts based on gestational age. Encouragingly, however, once the severity of the very low birth weight or very preterm birth was considered, the use of birthweight or gestational age did not contribute to heterogeneity in the meta-analysis estimates of the cognitive deficit associated with very preterm birth. [Extracted from the article]

We used two SGA definitions: birthweight <10th percentile and <-2 standard deviations.4 We identified 37 257 preterm births before 37 weeks of GA. Abbreviations FGR foetal growth restriction GA gestational age SGA small for gestational age Foetal growth restriction (FGR) is a major risk factor for infant mortality and morbidity and adverse lifelong developmental, mental and physical health outcomes.1 It is usually studied using small for gestational age (SGA), which is most commonly defined as a weight under the 10th percentile based on growth charts. There were 26 891 once we had excluded births <24 weeks, multiple births, missing birthweights or GA and discordant birthweights for GA (<300 g or I Z i -score <-6 or >4 standard deviations). [Extracted from the article]

Aim: To estimate healthcare use and related costs for 2-year-old very preterm (VP) children after discharge from the neonatal unit.Methods: As part of a European project, we recruited an area-based cohort including all VP infants born in three Italian regions (Lazio, Emilia-Romagna and Marche) in 2011-2012. At 2 years corrected age, parents completed a questionnaire on their child health and healthcare use (N = 732, response rate 75.6%). Cost values were assigned based on national reimbursement tariffs. We used multivariable analyses to identify factors associated with any rehospitalisation and overall healthcare costs.Results: The most frequently consulted physicians were the paediatrician (85% of children), the ophthalmologist (36%) and the neurologist/neuropsychiatrist (26%); 38% of children were hospitalised at least once after the initial discharge, for a total of 513 admissions and over one million euros cost, corresponding to 75% of total healthcare costs. Low maternal education and parental occupation index, congenital anomalies and postnatal prematurity-related morbidities significantly increased the risk of rehospitalisation and total healthcare costs.Conclusion: Rehospitalisation and outpatient care are frequent in VP children, confirming a substantial health and economic burden. These findings should inform the allocation of resources to preventive and rehabilitation services for these children. [ABSTRACT FROM AUTHOR]

Introduction: The objective of this study is to investigate factors associated with risks of perinatal death in a disadvantaged, high-migrant French district with mortality rates above the national average.Material and Methods: The study design is a perinatal audit in 2014 in all 11 maternity units in the Seine-Saint-Denis district (25 037 births). The data come from medical chart abstraction, maternal interviews and peer assessor confidential review of deaths. A representative sample of live births in the same district, from the 2010 French Perinatal Survey, was used for comparisons (n = 429). The main outcome measures were stillbirth and neonatal death (0-27 days) at ≥22 weeks of gestation.Results: The audit included 218 women and 227 deaths (156 stillbirths, 71 neonatal deaths); 75 women were interviewed. In addition to primiparity and multiple pregnancy, overweight and obesity increased mortality risks (50% of cases, adjusted odds ratios [aOR] 1.7, 95% confidence interval [CI] 1.1-2.8, and aOR 1.9 [95% CI 1.1-3.2], respectively) as did the presence of preexisting medical/obstetric conditions (28.6% of cases, aOR 3.2, 95% CI 2.0-5.3). Problems accessing or complying with care were noted in 25% of medical records and recounted in 50% of interviews. Assessors identified suboptimal factors in 73.2% of deaths and judged 33.9% to be possibly or probably preventable. Care not adapted to risk factors and poor healthcare coordination were frequent suboptimal factors. Possibly preventable deaths were higher (P < .05) for women with gestational diabetes or hypertension (44.6%) than women without (29.0%).Conclusions: Preventive actions to improve healthcare referral and coordination, especially for overweight and obese women and women with medical and obstetrical risk factors, could reduce perinatal mortality in disadvantaged areas. [ABSTRACT FROM AUTHOR]

Background: Monitoring severe acute maternal morbidity (SAMM) appears essential for optimising care and informing health care policies, especially given changes in obstetric practices and mother profiles. International comparisons can identify areas where improvement is needed, but the comparability of indicators must be evaluated.Objective: To assess the feasibility of monitoring SAMM using common definitions from hospital discharge databases across Europe.Methods: We used hospital discharge data in eight countries (2 826 868 deliveries) to identify women with SAMM among all hospitalisations of women of reproductive age admitted for antenatal or delivery care. Five SAMM indicators were investigated: eclampsia, septicaemia, hysterectomy, hysterectomy associated with a diagnosis of obstetric haemorrhage, and red blood cell (RBC) transfusion associated with a diagnosis of obstetric haemorrhage. Between-country variation was described, by the ratio of the highest to lowest rates, while external validation was assessed by comparing with population-based studies on maternal morbidity.Results: Ratios for hysterectomy and red blood cell (RBC) transfusion in the context of obstetric haemorrhage were 1:2.1 and 1:3.5, respectively. High values of hysterectomy and low values of transfusion were both consistent with high maternal mortality from haemorrhage (France, Italy, Portugal). Ratios across countries were relatively low for eclampsia (1:3.4) but very high for septicaemia (1:22.5). Compared to population-based morbidity estimates, eclampsia was over-reported in hospital databases whereas the two indicators of severe haemorrhage had good external validity.Conclusions: In association with diagnosis codes indicating obstetric haemorrhage, hysterectomy and RBC transfusion appear to be good candidates for surveillance of maternal morbidity in Europe. [ABSTRACT FROM AUTHOR]

Background: Neonatal morbidity is associated with lifelong impairments, but the absence of a consensual definition and the need for large data sets limit research.Objectives: To inform initiatives to define standard outcomes for research, we reviewed composite neonatal morbidity indicators derived from routine hospital discharge data.Data Sources: PubMed (updated on October 12, 2018). The search algorithm was based on three components: "morbidity," "neonatal," and "hospital discharge data."Study Selection and Data Extraction: Studies investigating neonatal morbidity using a composite indicator based on hospital discharge data were included. Indicators defined for specific conditions (eg congenital anomalies, maternal addictions) were excluded. The target population, objectives, component morbidities, diagnosis and procedure codes, validation methods, and prevalence of morbidity were extracted.Synthesis: For each study, we assessed construct validity by describing the methods used to select the indicator components and evaluated whether the authors assessed internal and external validity. We also calculated confidence intervals for the prevalence of the morbidity composite.Results: Seventeen studies fulfilled inclusion criteria. Indicators targeted all (n = 4), low-/moderate-risk (n = 9), and very preterm (VPT, n = 4) infants. Components were similar for VPT infants, but domains and diagnosis codes within domains varied widely for all and low-/moderate-risk infants. Component selection was described for 8/17 indicators and some form of validation reported for 12/17. Neonatal morbidity prevalence ranged from 4.6% to 9.0% of all infants, 0.4% to 8.0% of low-/moderate-risk infants, and 17.8% to 61.0% of VPT infants.Conclusions: Multiple neonatal morbidity indicators based on hospital discharge data have been used for research, but their heterogeneity limits comparisons between studies. Standard neonatal outcome measures are needed for benchmarking and synthesis of research results. [ABSTRACT FROM AUTHOR]

Copyright of Developmental Medicine & Child Neurology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective: To determine, by expert consensus using a Delphi procedure, a minimum reporting set of study variables for fetal growth restriction (FGR) research studies.Methods: A panel of experts, identified based on their publication record as lead or senior author of studies on FGR, was asked to select a set of essential reporting study parameters from a literature-based list of variables, utilizing the Delphi consensus methodology. Responses were collected in four consecutive rounds by online questionnaires presented to the panelists through a unique token-secured link for each round. The experts were asked to rate the importance of each parameter on a five-point Likert scale. Variables were selected in the three first rounds based on a 70% threshold for agreement on the Likert-scale scoring. In the final round, retained parameters were categorized as essential (to be reported in all FGR studies) or recommended (important but not mandatory).Results: Of the 100 invited experts, 87 agreed to participate and of these 62 (71%) completed all four rounds. Agreement was reached for 16 essential and 30 recommended parameters including maternal characteristics, prenatal investigations, prenatal management and pregnancy/neonatal outcomes. Essential parameters included hypertensive complication in the current pregnancy, smoking, parity, maternal age, fetal abdominal circumference, estimated fetal weight, umbilical artery Doppler (pulsatility index and end-diastolic flow), fetal middle cerebral artery Doppler, indications for intervention, pregnancy outcome (live birth, stillbirth or neonatal death), gestational age at delivery, birth weight, birth-weight centile, mode of delivery and 5-min Apgar score.Conclusions: We present a list of essential and recommended parameters that characterize FGR independent of study hypotheses. Uniform reporting of these variables in prospective clinical research is expected to improve data quality, study consistency and ultimately our understanding of FGR. Copyright © 2018 ISUOG. Published by John Wiley & Sons Ltd. [ABSTRACT FROM AUTHOR]

Background: The Intergrowth-21st (IG) project proposed prescriptive fetal growth standards for global use based on ultrasound measurements from a multicounty study of low-risk pregnancies selected using strict criteria. We examined whether the IG standards are appropriate for fetal growth monitoring in France and whether potential differences could be due to IG criteria for "healthy" pregnancies.Method: We analysed data on femur length and abdominal circumference at the second and/or the third recommended ultrasound examination from 14 607 singleton pregnancies from the Elfe national birth cohort. We compared concordance of centile thresholds using the IG standards and current French references and used restricted cubic splines to plot z-scores by gestational age. A "healthy pregnancy" sub-sample was created based on maternal and pregnancy selection criteria, as specified by IG.Results: Mean gestational age-specific z-scores for femur length and abdominal circumference using French references fluctuated around 0 (-0.2 to 0.1), while those based on IG standards were higher (0.3-0.8). Using IG standards, 2.5% and 5.2% of fetuses at the third ultrasound were <10th centile for femur length and abdominal circumference, respectively, and 31.5% and 16.7% were >90th. Only 34% of pregnancies fulfilled IG low-risk criteria, but sub-analyses yielded very similar results.Conclusion: Intergrowth standards differed from fetal biometric measures in France, including among low-risk pregnancies selected to replicate IG's healthy pregnancy sample. These results challenge the project's assumption that careful constitution of a low-risk population makes it possible to describe normative fetal growth across populations. [ABSTRACT FROM AUTHOR]

Background: Facilitating factors and barriers to breast milk feeding (BMF) very preterm (VP) infants have been widely studied at the individual level. We aimed to describe and analyse factors associated with BMF at discharge for VP infants, with a special focus on unit policies aiming to support BMF.Methods: We described BMF at discharge in 3108 VP infants enrolled in EPIPAGE-2, a French national cohort. Variables of interest were kangaroo care during the 1st week of life (KC); unit's policies supporting BMF initiation (BMF information systematically given to mothers hospitalised for threatened preterm delivery and breast milk expression proposed within 6 hours after birth) and BMF maintenance (availability of protocols for BMF and a special room for mothers to pump milk); the presence in units of a professional trained in human lactation and regional BMF initiation rates in the general population. Associations were investigated by multilevel logistic regression analysis, with adjustment on individual factors.Results: In total, 47.2% of VP infants received BMF at discharge (range among units 21.1%-84.0%). Unit policies partly explained this variation, regardless of individual factors. BMF at discharge was associated with KC (adjusted odds ratio (aOR) 2.26 (95% confidence interval (CI) 1.40, 3.65)), with policies supporting BMF initiation (aOR 2.19 (95% CI 1.27, 3.77)) and maintenance (aOR 2.03 (95% CI 1.17, 3.55)), but not with BMF initiation rates in the general population.Conclusion: Adopting policies of higher performing units could be an effective strategy for increasing BMF rates at discharge among VP infants. [ABSTRACT FROM AUTHOR]

The article presents the discussion on optimising existing data on stillbirths for exploring trends and risk factors in countries with similar standards of living and access to health services. Topics include recording of stillbirths in population databases relating to terminations of pregnancy and extremely preterm births; and confirming associations with maternal age, foetal growth restriction, and social deprivation as measured using an area-based score.

Background: The World Health Organization recommends exclusive breast milk feeding until 6 months and continuing up to 2 years of age; little is known about whether very preterm infants are fed in accordance with these recommendations. We aimed to describe the prevalence and duration of breast milk feeding in very preterm children and to systematically review internationally published data.Methods: We evaluated breast milk feeding initiation and duration in very preterm children born in 2 Portuguese regions (2011-2012) enrolled in the EPICE cohort and followed-up to the age of 3 (n = 466). We searched PubMed® from inception to January 2017 to identify original studies reporting the prevalence and/or duration of breast milk feeding in very preterm children.Results: 91.0% of children received some breast milk feeding and 65.3% were exclusively breast fed with a median duration of 2 months for exclusive and 3 months for any breast milk; only 9.9% received exclusive breast milk for at least 6 months, 10.2% received any breast milk for 12 months or more, and 2.0% for up to 24 months. The literature review identified few studies on feeding after hospital discharge (n = 9); these also reported a low prevalence of exclusive breast milk feeding at 6 months (1.0% to 27.0%) and of any breast milk at 12 months (8.0% to 12.0%).Conclusions: The duration of breast milk feeding among Portuguese very preterm infants was shorter than recommended. However, this appears to be common globally. Research is needed to inform strategies to promote continued breast milk feeding. [ABSTRACT FROM AUTHOR]

Background: The reduction in the under-5 year mortality rate to at least as low as 25 per 1000 livebirths by 2030 has been implemented as one of the new Sustainable Development Goals. Fetal growth restriction (FGR) is one of the most important determinants of infant mortality in developing countries. In this review, we assess the extent of the literature and summarize its findings on the main preventable factors of FGR in Africa.Methods: A scoping review was conducted using the Arksey and O'Malley framework. Five bibliographic databases and grey literature were used to identify studies assessing at least one risk factor for FGR. Aggregate risk estimates for the main factors associated with FGR were calculated.Results: Forty-five of a total of 671 articles were selected for the review. The prevalence of FGR varied between 2.6 and 59.2% according to both the African region and the definition of FGR. The main preventable factors reported were a low maternal nutritional status (aggrerate odds ratio [OR]: 2.28, 95% confidence interval [CI] 1.59, 3.25), HIV infection (aOR 1.86, 95% CI 1.38, 2.50), malaria (aOR 1.95, 95% CI 1.04, 3.66), and gestational hypertension (aOR 2.61, 95% CI 2.42, 2.82).Conclusion: FGR is, to a large extent, preventable through existing efficacious interventions dedicated to malaria, HIV and nutrition. Further studies are still needed to assess the influence of risk factors most commonly documented in high-income countries. Improving research on FGR in Africa requires a consensual and standardized definition of FGR-for a higher comparability-between studies and settings. [ABSTRACT FROM AUTHOR]

Breast milk feeding (BMF) is associated with lower neonatal morbidity in the very preterm infant (<32 weeks gestation) and breastfeeding is beneficial for maternal health. Previous studies show large variations in BMF after very preterm birth and recognize the need for targeted breastfeeding support in the neonatal intensive care units (NICU). In a European collaboration project about evidence-based practices after very preterm birth, we examined the association between maternal, obstetric, and infant clinical factors; neonatal and maternal care unit policies; and BMF at discharge from the NICU. In multivariable analyses, covariates associated with feeding at discharge were first investigated as predictors of any BMF and in further analysis as predictors of exclusive or partial BMF. Overall, 58% (3,826/6,592) of the infants received any BMF at discharge, but there were large variations between regions (range 36-80%). Primiparity, administration of antenatal corticosteroids, first enteral feed <24 hr after birth, and mother's own milk at first enteral feed were predictors positively associated with any BMF at discharge. Vaginal delivery, singleton birth, and receiving mother's own milk at first enteral feed were associated with exclusive BMF at discharge. Units with a Baby Friendly Hospital accreditation improved any BMF at discharge; units with protocols for BMF and units using donor milk had higher rates of exclusive BMF at discharge. This study suggests that there is a high potential for improving BMF through policies and support in the NICU. [ABSTRACT FROM AUTHOR]

Background: The Apgar score has been shown to be predictive of neonatal mortality in clinical and population studies, but has not been used for international comparisons. We examined population-level distributions in Apgar scores and associations with neonatal mortality in Europe.Methods: Aggregate data on the 5 minute Apgar score for live births and neonatal mortality rates from countries participating in the Euro-Peristat project in 2004 and 2010 were analysed. Country level associations between the Apgar score and neonatal mortality were assessed using the Spearman rank correlation coefficient.Results: Twenty-three countries or regions provided data on Apgar at 5 minutes, covering 2 183 472 live births. Scores <7 ranged from 0.3% to 2.4% across countries in 2004 and 2010 and were correlated over time (ρ = 0.88, P < 0.01). There were large differences in healthy baby scores: scores of 10 ranged from 8.8% to 92.7% whereas scores of 9 or 10 ranged from 72.9% to 96.8%. Countries more likely to score 10 s, as opposed to 9 s, for healthy babies had lower proportions of Apgar <7 (ρ = -0.43, P = 0.04). Neonatal mortality rates were weakly correlated with Apgar score <7 (ρ = -0.06, P = 0.61), but differences over time in these two indicators were correlated (ρ =0.56, P = 0.02).Conclusions: Large variations in the distribution of Apgar scores likely due to national scoring practices make the Apgar score an unsuitable indicator for benchmarking newborn health across countries. However, country-level trends over time in the Apgar score may reflect real changes and merit further investigation. [ABSTRACT FROM AUTHOR]

The article comments on the investigation study on disparities in preterm birth and other pregnancy outcomes by race or ethnicity in the United States. Topics include the disparities between non‐Hispanic Black women and non‐Hispanic White women; similarity in maternal age risk patterns; and study on overall preterm birth rates and preterm birth in terms of spontaneous versus clinician indicated subtypes.

Aim: We evaluated the impact of fetal growth restriction on neurodevelopmental outcomes at 2 years corrected age for infants born before 27 weeks gestational age.Method: Data on infants born before 27 weeks gestational age between 1999 and 2008 (n=463), admitted to a tertiary neonatal unit in Paris, were used to compare neurological outcomes at 2 years for infants with birthweight lower than the 10th centile and birthweight of at least the 10th centile, using intrauterine reference curves. Outcomes were cerebral palsy (CP) and the Brunet-Lézine assessment of cognitive development, which provides age-corrected overall and domain-specific (global and fine motor skills, language and social interaction) developmental quotients. Models were adjusted for perinatal and social factors.Results: Seventy-two percent of infants were discharged alive. Eighty-three percent (n=268) were evaluated at 2 years. Six percent had CP. Fetal growth restriction was not associated with the risk of CP. After adjustment, children with a birthweight lower than the 10th centile had a global developmental quotient 4.7 points lower than those with birthweight of at least the 10th centile (p<0.001); differences were greatest for fine motor and social skills (-4.7, p=0.053 and -7.3, p<0.001 respectively).Interpretation: In extremely preterm children, fetal growth restriction was associated with poorer neurodevelopmental outcomes at 2 years, but not with CP. [ABSTRACT FROM AUTHOR]

Background: Gestational age estimation by last menstrual period (LMP) vs. ultrasound (or best obstetric estimate in the US) may result in discrepant classification of preterm vs. term birth. We investigated whether such discrepancies are associated with adverse infant outcomes.Methods: We studied singleton livebirths in the Medical Birth Registries of Norway, Sweden and Finland and US live birth certificates from 1999 to the most recent year available. Risk ratios (RR) with 95% confidence intervals (CI) by discordant and concordant gestational age estimation for infant, neonatal and post-neonatal mortality, Apgar score <4 and <7 at 5 min, and neonatal intensive care unit (NICU) admission were estimated using generalised linear models, adjusting for maternal age, education, parity, year of birth, and infant sex. Results were presented stratified by country.Results: Compared to infants born at term by both methods, infants born preterm by ultrasound/best obstetric estimate but term by LMP had higher infant mortality risks (range of adjusted RRs 3.9 to 7.2) and modestly higher risks were obtained among infants born preterm by LMP but term by ultrasound/best obstetric estimate (range of adjusted RRs 1.6 to 1.9). Risk estimates for the other outcomes showed the same pattern. These findings were consistent across all four countries.Conclusions: Infants classified as preterm by ultrasound/best estimate, but term by LMP have consistently higher risks of adverse outcomes than those classified as preterm by LMP but term by ultrasound/best estimate. Compared with ultrasound/best estimate, use of LMP overestimates the proportion of births that are preterm. [ABSTRACT FROM AUTHOR]