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Background: Stress exposure in the neonatal intensive care unit (NICU) is associated with poor outcomes in preterm infants. However, factors predicting subsequent NICU stress exposure have not been identified. Purpose: To characterize NICU stressors experienced by preterm infants during the first 2 weeks of life and identify demographic, perinatal, and institutional variables associated with stress exposure. Methods: A secondary analysis of data from a nonexperimental, prospective study was conducted using data from 60 very preterm infants born 28 to 31 weeks gestational age. Stress exposures during the first 2 weeks of life, operationalized as number of invasive procedures, were characterized by type and quantity for each infant using data extracted from electronic health records. Associations between number of invasive procedures and demographic, perinatal, or institutional variables were analyzed using linear regressions with robust standard errors. Results: Preterm infants experienced, on average, 98 (SD = 41.8) invasive procedures. Of these invasive procedures, nasal and/or oral suctioning episodes (58.1%), followed by skin-breaking procedures (32.6%), were most frequent. Differences in the number of invasive procedures were found for maternal race; infants born to Black mothers experienced fewer total invasive procedures than infants born to White mothers. The number of invasive procedures also varied across NICUs. Implications for Practice and Research: Preterm infant stress exposure differed by maternal race and NICU, consistent with research findings of differential treatment of diverse infants. Further research is needed to understand the reasons for these differences and to identify best practices to standardize neonatal care. [ABSTRACT FROM AUTHOR]

Purpose: To characterize and quantify touch experienced by preterm infants in the NICU during essential nursing care, identify instances of skin-to-skin touch between infants and caregivers, and identify clinical/demographic variables associated with touch experiences. Design: Cross-sectional study. Sample: Preterm infants (N = 20) born 27–32 weeks post-menstrual age. Main Outcome Variable: Categories of touch during observations. Results: Touch experienced by infants during day and night shifts was primarily direct touch that was further categorized as general handling. During day shifts, 30 percent of direct touch was provided for comfort, but only 9.7 percent of touch was provided exclusively for comfort (i.e., without more intrusive touch). During night shifts, 10.6 percent of direct touch was provided for comfort, and 3 percent was categorized as exclusive comforting touch. Caregivers wore gloves for >89 percent of infant touch. Only the level of respiratory support was associated with touch categories during both shifts. [ABSTRACT FROM AUTHOR]

Supplemental Digital Content is Available in the Text. Positive tactile experiences in the newborn period are critical to normal sensory development. Universal gloving in the neonatal intensive care unit has become a controversial issue in neonatal nursing practice. Intended to prevent infection among neonatal patients, universal gloving also hinders the provision of human touch. The purpose of this survey study was to (1) describe gloving policies in neonatal intensive care units, and (2) describe the gloving and touch practices of neonatal nurses and identify associations between these practices and demographic characteristics. The investigators developed a 19-question, anonymous survey. The survey link was distributed through the National Association of Neonatal Nurses' social media and newsletter. Of the 137 responses, only 22.1% of nurses reported unit policy requiring universal gloving. While nurses reported some ambiguity about gloving policies, surveyed nurses commonly used gloves when performing general care activities. Institutional gloving policies varied in this geographically diverse sample, but routine, bare-handed touch was an uncommon practice among neonatal nurses. Research evidence is needed to guide nursing practice and inform policy decisions regarding glove use in the neonatal intensive care unit. [ABSTRACT FROM AUTHOR]

Background: Although the survival rate of very preterm infants has improved, rates of subsequent neurobehavioral disabilities remain high. One factor implicated in poor neurobehavioral and developmental outcomes is hospitalization and inconsistent caregiving patterns in the neonatal intensive care unit. Although much underlying brain damage occurs in utero or shortly after birth, neuroprotective strategies may stop progression of damage, particularly when these strategies are used during the most sensitive periods of neural plasticity 2-3 months before term age. Objective: The purpose of this analysis was to test the effect of a patterned feeding experience involving a tactile component (touch and/or holding) provided during feedings on preterm infants' clinical outcomes, measured by oral feeding progress, as an early indicator of neurodevelopment. Methods: We used an experimental, longitudinal, two-group random assignment design. Preterm infants (n = 120) were enrolled within the first week of life and randomized to an experimental group receiving a patterned feeding experience or to a control group receiving usual feeding care. Results: Analysis of data from 91 infants showed that infants receiving touch at more than 25% of early gavage feedings achieved full oral feeding more quickly; as touch exposure increased, time from first oral to full oral feeding decreased. There was no association between holding during early gavage feedings or touch during transition feedings and time to full oral feeding. Discussion: Neurological expectation during critical periods of development is important for infants. However, a preterm infant's environment is not predictable: Caregivers change regularly, medical procedures dictate touch and holding, and care provision based on infant cues is limited. Current knowledge supports caregiving that occurs with a naturally occurring sensation (i.e., hunger), is provided in a manner that is congruent with the expectation of the neurological system, and occurs with enough regularity to enhance neuronal and synaptic development. In this study, we modeled an experience infants would "expect" if they were not in the neonatal intensive care unit and demonstrated a shorter time from first oral feeding to full oral feeding, an important clinical outcome with neurodevelopmental implications. We recommend further research to determine the effect of patterned caregiving experiences on other areas of neurodevelopment, particularly those that may occur later in life. [ABSTRACT FROM AUTHOR]

Aims: (a) Determine relationships among stress exposure, inflammation, and neurodevelopment in very preterm infants and determine the mediated effect of inflammation on the relationship between stress exposure and neurodevelopment; (b) describe cytokine trajectories following birth and determine the effect of stress exposure on these trajectories; and (c) examine relationships between stress exposure and chronic stress responses in very preterm infants. Design: Non‐experimental, repeated measures. Methods: Very preterm infants born 28–31 weeks post menstrual age will be enrolled. Cumulative stress exposure over the first 14 days of life will be measured using the Neonatal Infant Stressor Scale. Blood will be collected weekly for the quantification of cytokines. Neurodevelopment will be assessed using the Neurobehavioral Assessment of the Preterm Infant and hair for quantification of hair cortisol will be collected at 35 weeks post menstrual age. Multiple linear regression and conditional process analysis will be used to analyse the relationships among stress exposure, inflammation and neurodevelopment. Linear mixed models will be used to determine inflammatory trajectories over time. IRB approval for the study was received May 2017, and funding from the National Institute of Nursing Research was awarded July 2017. Discussion: This study will determine the extent to which inflammation mediates the relationship between stress exposure and neurodevelopment. Interventions to attenuate inflammation in preterm infants may improve outcomes. Impact: Determining the potentially modifiable mediators of stress exposure and neurodevelopment in preterm infants is critical to improving long‐term outcomes. [ABSTRACT FROM AUTHOR]

Aims The aims of this study are to describe: (1) the frequency of nurse-reported missed care in neonatal intensive care units; and (2) nurses' reports of factors contributing to missed care on their last shift worked. Background Missed nursing care, or necessary care that is not delivered, is increasingly cited as a contributor to adverse patient outcomes. Previous studies highlight the frequency of missed nursing care in adult settings; the occurrence of missed nursing care in neonatal intensive care units is unknown. Design A descriptive analysis of neonatal nurses' self-reports of missed care using data collected through a cross-sectional web-based survey. Methods A random sample of certified neonatal intensive care nurses in seven states was invited to participate in the survey in April 2012. Data were collected from nurses who provide direct patient care in a neonatal intensive care unit ( n = 230). Descriptive statistics constituted the primary analytic approach. Results Nurses reported missing a range of patient care activities on their last shift worked. Nurses most frequently missed rounds, oral care for ventilated infants, educating and involving parents in care and oral feedings. Hand hygiene, safety and physical assessment and medication administration were missed least often. The most common reasons for missed care included frequent interruptions, urgent patient situations and an unexpected rise in patient volume and/or acuity on the unit. Conclusion We find that basic nursing care in the neonatal intensive care unit is missed and that system factors may contribute to missed care in this setting. [ABSTRACT FROM AUTHOR]

Aim We describe an innovative research protocol to test the role of missed nursing care as a mediator of the association between nurse workload and patient outcomes in the neonatal intensive care unit. Background Increases in nurses' workloads are associated with adverse patient outcomes in neonatal intensive care settings. Missed nursing care is a frequently hypothesized explanation for the association between workload and outcomes. Few studies to date have tested missed care as a variable that mediates the workload-outcomes relationship. Design We use a longitudinal, observational study design. Methods We will recruit approximately 125 nurses (80% of target population) providing direct patient care in one neonatal intensive care unit. Four, 6-week data collection cycles occur over 1 year. At the end of every shift, nurses report on their workloads and the frequency with which specific patient care activities were missed for each infant cared for during the shift. Infant-specific nurse reports of missed care are linked to shift-level infant outcomes data extracted from the electronic health record. Funding for the study began in July 2012; Research Ethics Committee approval was granted in December 2012. Discussion Missed care may explain the effects of nurse workload on patient outcomes. This research will generate preliminary evidence regarding the causal relationships among nurses' workloads, missed care and infant outcomes that we will confirm in a future multi-site study. [ABSTRACT FROM AUTHOR]

Objective To examine the association of missed oral feeding opportunities among preterm infants with achievement of full oral feedings and length of hospitalization. Study Design A secondary analysis of clinical trial data was conducted. Study infants included in the analysis (N = 89) were randomized to one of four standardized feeding progression approaches; detailed records on all feedings were maintained. The proportion of oral feeding opportunities reported as missed due to factors unrelated to the infant's clinical condition was calculated for each infant. Results The proportion of missed oral feeding opportunities per infant ranged from 0 to 0.12; 30 infants experienced one or more missed oral feeding opportunity. Each 1% increase in the proportion of missed oral feeding opportunities extended the time to achieve full oral feeding by 1.45 days (p = 0.007) and time to discharge by 1.36 days (p = 0.047). Conclusion Preterm infants' missed oral feeding opportunities may adversely affect feeding outcomes and extend hospitalization. [ABSTRACT FROM AUTHOR]

Purpose The purpose of this study was to explore the relationships among the mother's internal working model of feeding, attentional process, feeding behaviors, and responsiveness accounting for maternal psychological distress, which may contribute to preterm infants' feeding difficulties. Design and Methods In this descriptive study, 21 mother-preterm infant dyads were videotaped during feeding. Results Surprisingly, the internal working model of feeding was a significant negative predictor of maternal feeding behaviors and maternal attention. All other correlations were non-significant. Conclusions Given the early timing of the data collection, it is possible that mothers had not developed a frame of reference of their infant as a person. Research to help further understand factors and timing affecting maternal feeding behaviors is needed. [ABSTRACT FROM AUTHOR]

The purpose of this phenomenological study was to examine the experiences of mothers of preterm infants during the first 6 months at home following discharge from a neonatal intensive care unit (NICU). A purposeful sample of 8 mothers was gathered and interviews were conducted over a 4-month period. Each interview was audio recorded and took place in the study participant's home or another place of her choosing. Interviews were transcribed verbatim and analyzed independently with themes being identified and organized for each participant. From these analyses, the themes of fear, exhaustion, determination, and thankfulness were identified as being common to all study participants and became the basis for developing the essence of the phenomenon. The essence of this experience for these mothers was their resolve to do whatever was necessary to ensure the best possible outcomes for their infants. The data gathered from these personal interviews will serve to further inform our understanding of this important time from the perspective of those who experienced it, as well as aid in the design of interventions to address the specific needs of these mothers prior to NICU discharge. [ABSTRACT FROM AUTHOR]

Objective: To examine the effect of neonatal intensive care unit environmental characteristics (perceived levels of light and sound, and time of day) in open unit wards and single-family rooms (SFRs) on oral feeding outcomes in preterm infants. Design: Data were collected at each scheduled oral feeding for 87 preterm infants from the first oral feeding until discharge. Data included the prescribed volume of feeding and the volume consumed, the infant's level of wakefulness before feeding, and the nurse's perception of light and sound. Results: Data were collected on 5111 feedings in the ward unit and 5802 in the SFR unit from feedings involving 87 preterm infants. Light and sound were rated significantly lower in the SFR (χ² = 139 and 1654.8, respectively). Feeding times of 9 am, 12 noon, and 3 pm were associated with the highest perceived levels of light and sound, regardless of unit design (P, 0.0001). Moderate light levels and feeding times of 12, 3, and 6 am were associated with improved feeding outcomes. Infants consumed a greater proportion of their prescribed feeding volume when fed in the open ward and when awake before feeding. Conclusion: Further study on the clinical effects of unit design is needed, as is study on the effects of environmental stimuli, so that interventions can be appropriately developed and tailored for infants needing the most support for optimal development. [ABSTRACT FROM AUTHOR]

Purpose The purpose of this study was to determine how mothers of preterm infants perceive the feasibility and acceptability of a guided feeding intervention. Design and Methods In this multiple case study design, feasibility was assessed by retention of participants through all intervention sessions. Acceptability was assessed with a semi-structured interview. Results Participants found the intervention useful for demonstrating and explaining behaviors that facilitate feeding, and helpful in dispelling previous, erroneous understandings about infant behaviors. Practice Implications The results are encouraging. The intervention was found to be both feasible and acceptable. The effectiveness of this intervention needs to be assessed in a randomized controlled trial. [ABSTRACT FROM AUTHOR]

Abstract: The purpose of this analysis was to measure changes in preterm infant feeding skill between discharge and two weeks post-discharge. Data were from 2 samples—22 preterm infants who participated in a non-experimental study of feeding readiness and 63 preterm infants who participated in a study of four oral feeding approaches. Both studies were approved by the institutional review board; parents gave informed consent. The Early Feeding Skills Assessment was used to measure feeding skills. Data were analyzed descriptively and by analysis of variance and regression. Analysis revealed that feeding skills changed selectively from discharge to post-discharge and that discharge skills were predictive of post-discharge skill. Changes that occur in feeding skills during the immediate post-discharge period have received little attention from researchers. The findings suggest that enhanced predischarge assessment and parent teaching maybe necessary to reduce reported parental stress associated with feeding the newly discharged infant and to promote a positive feeding experience. [Copyright &y& Elsevier]

Abstract: This longitudinal study of maternal responsiveness included a sample 23 mothers of preterm infants. The mothers completed questionnaires at three intervals: 2 weeks postpartum, 2 weeks after the infant''s discharge from the neonatal intensive care unit, and 3 months postpartum. Factors that have a potential effect on maternal responsiveness including postpartum depression, social support, stressors, self-esteem, maternal well-being, and maternal attitude were also examined. There were no significant changes in these variables or in maternal responsiveness over time. Social support and self-esteem were found to have a significant positive relationship with maternal responsiveness. Stressors had a significant inverse relationship with maternal responsiveness. There were no significant relationships between maternal well-being, postpartum depression, and maternal attitude about being a mother and maternal responsiveness. The findings suggest that although maternal responsiveness may be stable over time, it may be associated with other characteristics of the mother that need to be assessed. [Copyright &y& Elsevier]

Background: Extended hospitalization in neonatal intensive care units subjects preterm infants to multiple stress exposures that affect long-term cognitive functioning, motor development, and stress reactivity. Measurement of stress exposure is challenging with multiple measures of stress exposure in use, including counts of skin-breaking or invasive procedures or counts of noxious sensory exposures. Objectives: The purpose of this analysis was to compare measures of stress exposure commonly used by researchers and to determine the predictive validity of these measures for early neurobehavior. We accomplished this objective through the following specific aims: (a) describe the stress exposures of preterm infants in the first 2 weeks of life, (b) determine the correlations among measures of stress exposure, and (c) compare the predictive validity of measures of stress exposure for early neurobehavior. Methods: Very preterm infants born between 28 and 31 weeks postmenstrual age were enrolled from four neonatal intensive care units in a large Midwest city. We measured stress exposure over the first 14 days of life for each infant as a count of skin-breaking procedures, a count of invasive procedures, and cumulative scores derived from the Neonatal Infant Stressor Scale. Neurobehavior was assessed at 35 weeks postmenstrual age using the motor development and vigor and alertness/orientation subscales from the Neurobehavioral Assessment of the Preterm Infant. We used Spearman's rho to determine correlations among the measures of stress exposure and multiple linear regression to determine the predictive validity of each stress exposure measure for neurobehavioral outcomes. Results: Seventy-one preterm infants were included in the analysis. We found marked variance across individuals in all measures of stress exposure. There were moderate-high correlations among the measures of stress exposure. No measure of stress exposure was associated with early neurobehavior. Discussion: The stress experiences of hospitalized preterm infants vary. This variance is reflected in all measures of stress exposure. Because measures of stress exposure are highly correlated, the most objective measure requiring the least interpretation should be used. However, the currently available measures of stress exposure used in this analysis may not reflect the infant's physiological stress responses and fail to associate with early neurobehavior. [ABSTRACT FROM AUTHOR]

Background: Infants in the neonatal intensive care unit experience aversive stimuli that cause pain and distress. Maintaining adequate relief from pain and distress is challenging because of infants' varying ages and stages of development and their nonverbal status. Thus, pain and distress must be interpreted by a healthcare provider or other proxy from their own observations or perceptions. There is no standard research or clinical measure for pain and distress in infants. Objective: The purpose of this analysis was to evaluate the use of the COMFORT Behavior (COMFORT-B) Scale as a measure of pain and distress in infants diagnosed with life-threatening or life-limiting illnesses in the neonatal intensive care unit in comparison with the nurse-documented Neonatal Pain, Agitation and Sedation Scale; the infants' Technology Dependence Scale; and the mothers' report of total perceived symptom scores. Methods: Infants diagnosed with life-threatening or life-limiting illnesses and hospitalized in a Level IV neonatal intensive care unit in the Midwestern United States and their parents were included. Measurement of pain and distress in infants was collected weekly from enrollment through 12 weeks or until discharge, whichever occurred first. Observations for the COMFORT-B Scale were conducted before and after standard caregiving activities. Pearson r correlations were used to compare means between pain and distress, technology dependence, and mothers' total perceived symptom scores over time. Results: Data from 78 infants (46 male and 32 female infants) of ages 23-41 weeks of gestation at birth were analyzed. No correlations were found among the COMFORT-B Scale; the Neonatal Pain, Agitation and Sedation Scale; and mothers' total perceived symptom scores. Moderate correlations were found among the Technology Dependence Scale; mothers' total perceived symptom scores; and the Neonatal Pain, Agitation and Sedation Scale. Discussion: Performing COMFORT-B observations can be challenging, and it is unclear whether the information obtained from the COMFORT-B Scale added to the assessment of the infant's pain and distress that is typically recorded in the health record or from parents. Further evaluation is needed to determine if it is more reliable to collect the Neonatal Pain, Agitation and Sedation Scale scores rather than conduct observations using the COMFORT-B Scale in studies of infants with life-threatening and life-limiting illnesses in the neonatal intensive care unit. [ABSTRACT FROM AUTHOR]

Supplemental digital content is available in the text. Background: Inflammation may be an important predictor of long-term neurodevelopment in preterm infants. The identification of specific inflammatory biomarkers that predict outcomes is an important research goal. Objectives: The purpose of this analysis was to identify associations between an early measure of inflammation and neurodevelopment in very preterm infants and to identify differences in the relationship between inflammation and neurodevelopment based on infant gender and race. Methods: We conducted a secondary analysis of data from a randomized controlled trial of a caregiving intervention for preterm infants born less than 33 weeks postmenstrual age. Plasma was collected with a clinically indicated laboratory draw by neonatal intensive care unit nurses and analyzed by multiplex assay for cytokines, chemokines, and growth factors. Neurobehavior was assessed by research nurses at the time of discharge from the neonatal intensive care unit using the motor development and vigor and alertness/orientation clusters from the Neurobehavioral Assessment of the Preterm Infant. Neurodevelopment was assessed at 6 months corrected age by the developmental specialist in the hospital's neonatal follow-up clinic using the Bayley Scales of Infant Development, Third Edition. We used linear regressions to estimate the effect of cytokine levels on neurodevelopment and allowed the effects to differ by infant gender and race. Results: In a sample of 62 preterm infants with discharge neurobehavioral assessments and a sample of 40 preterm infants with 6-month neurodevelopmental assessments, we found inconsistent associations between single-time point inflammatory measures and neurobehavior or neurodevelopment in analyses of the total sample. However, regressions with interactions revealed effects for multiple inflammatory measures on early neurobehavior and neurodevelopment that differed by infant gender and race. Discussion: Although early single-time point measures of inflammation may be insufficient to predict neurodevelopment for all preterm infants, the effect of inflammation appears to differ by infant gender and race. These demographic factors may be important considerations for future studies of inflammation and neurodevelopment as well was the development of future interventions to optimize outcomes. [ABSTRACT FROM AUTHOR]

An introduction is presented in which the guest editors discuss the theme of the issue, understanding and intervening to improve outcomes of infants and children born with chronic, complex health conditions.

Background: Hair cortisol is a measure of chronic or repeated hypothalamic--pituitary--adrenal axis activation in response to physical or psychological stressors. Hair cortisol has been successfully used as a measure of chronic stress in adults and children; however, its use as a valid measure in preterm infants has been limited by challenges in measuring cortisol in the low mass samples collectable from these infants. Objectives: The purpose of this report is to present a novel protocol for the measurement of hair cortisol in very low mass hair samples. Methods: Small changes were made to previously published protocols. After washing and pulverizing the hair samples, a double methanol cortisol extraction was performed. Samples were spiked with a known quantity of cortisol and analyzed in duplicate using an enzyme-linked immunosorbent assay. Results: Hair cortisol was detectable in samples weighing between 0.4 and 10.9 mg. The mean cortisol level was 23.74 pg/mg hair (SD = 26.38). Discussion: With small changes to previously published laboratory protocols, cortisol is quantifiable in low mass hair samples from preterm infants. This technical advance is an important step toward quantifying the stress experiences of hospitalized preterm infants. [ABSTRACT FROM AUTHOR]