1. Relationship between pre‐pregnancy maternal body mass index and infant weight trajectories in HIV‐exposed and HIV‐unexposed infants
- Author
-
Hlengiwe P. Madlala, Allison Zerbe, Kirsty Brittain, Gregory Petro, Elaine J. Abrams, Landon Myer, Angela M. Bengtson, Stanzi M le Roux, Thokozile R Malaba, and Tamsin K Phillips
- Subjects
medicine.medical_specialty ,Efavirenz ,Epidemiology ,Breastfeeding ,HIV Infections ,Overweight ,Article ,Body Mass Index ,chemistry.chemical_compound ,Pregnancy ,Humans ,Medicine ,Mass index ,Obesity ,Pregnancy Complications, Infectious ,Child ,business.industry ,Obstetrics ,Infant ,virus diseases ,medicine.disease ,Breast Feeding ,chemistry ,Pediatrics, Perinatology and Child Health ,Body-Weight Trajectory ,Female ,medicine.symptom ,business ,Body mass index ,Viral load ,Weight gain - Abstract
BACKGROUND: Maternal HIV and antiretroviral therapy exposure in-utero may influence infant weight, but the contribution of maternal y body mass index (BMI) to early life overweight and obesity is not clear. OBJECTIVE: To estimate associations between maternal BMI at entry to antenatal care and infant weight through approximately 1 year of age and to evaluate if associations were modified by maternal HIV status, maternal HIV and viral load, breast feeding intensity through 6 months or timing of entry into antenatal care. METHODS: We followed HIV-uninfected and -infected pregnant women initiating efavirenz-based antiretroviral therapy from first antenatal visit through 12 months postpartum. Infant weight was assessed via World Health Organization BMI and weight-for-length (WL) z-scores at 6 weeks, 3, 6, 9, and 12 months. We used multivariable linear mixed effects models to estimate associations between maternal BMI and infant z-scores over time. RESULTS: In 861 HIV-uninfected infants (454 HIV-exposed; 407 HIV-unexposed), nearly 20% of infants were overweight or obese by 12 months of age, regardless of HIV-exposure status. In multivariable analyses, increasing maternal BMI category was positively associated with higher infant BMIZ and WLZ scores between 6 weeks and 12 months of age and did not differ by HIV exposure status. However, HIV-exposed infants had slightly lower BMIZ and WLZ trajectories through 12 months of age, compared to HIV-unexposed infants across all maternal BMI categories. Differences in BMIZ and WLZ scores by HIV exposure were not explained by timing of entry into antenatal or maternal viral load pre-antiretroviral therapy initiation, but z-scores were slightly higher for HIV-exposed infants who were predominantly or exclusively versus partially breast fed. CONCLUSIONS: These findings suggest maternal BMI influences early infant weight gain, regardless of infant HIV-exposure status. Intervention to reduce maternal BMI may help to address growing concerns about obesity among HIV-uninfected children.
- Published
- 2021
- Full Text
- View/download PDF