Neonatal and Infant Mortality Risk Associated with Preterm and Small for Gestational Age Births in Tanzania: Individual Level Pooled Analysis Using the Intergrowth Standard - 13/12/17
, Karim Manji, MD, MPH 4, Christopher Duggan, MD, MPH 2, 3, 5, Honorati Masanja, PhD 6, Rodrick Kisenge, MD 4, Gernard Msamanga, MD 7, Willy Urassa, MD 8, Wafaie Fawzi, MBBS, MPH, DrPH 2, 5, 9Abstract |
Objectives |
To evaluate the risk of newborn and infant mortality associated with preterm, small for gestational age (SGA), and low birth weight (LBW) stratified by maternal HIV status and the location of birth.
Study design |
We created a prospective cohort by pooling 5 individually randomized trials. We used Cox proportional hazard models to estimate the risk of mortality for SGA defined using the recently published Intergrowth standard, preterm, LBW, and gestational age and size for gestational age categories (preterm- appropriate for gestational age [AGA], term-SGA, and preterm-SGA). Effect modification by maternal HIV status and place of residence was assessed using the likelihood ratio test.
Results |
Of the 31 988 infants, 15.3% were preterm, 16.6% were SGA, and 7.3% were LBW. The proportion of preterm and SGA births was higher among the HIV-infected cohort than in the uninfected cohort. Compared with term-AGA groups, infants born both preterm and SGA had a greater risk of neonatal mortality (hazard ratio [HR] 5.43, 95% CI 2.01-14.63) than preterm-AGA infants (HR 2.40, 95% CI 1.89-3.05) and term-SGA infants (HR 2.56, 95% CI 1.96-3.34). Maternal HIV infection modified the risk of infant mortality associated with being born preterm or LBW, with a higher relative risk among those born to HIV-uninfected women. Rural residence significantly modified the risk of neonatal mortality associated with being LBW (P for interaction = .005).
Conclusions |
Preterm and SGA newborns had an increased risk of mortality during the first year of life. Interventions targeting these conditions, especially in HIV-exposed and rural populations, should be integrated into existing maternal and child health programs.
Le texte complet de cet article est disponible en PDF.Keywords : low birth weight, gestational age, HIV, rural health, urban health
Abbreviations : AGA, ART, HR, LBW, SGA
Plan
| Supported by the National Institutes of Health (5T32AI007358-27 [to E.S.] and T32AI114398 [to A.S.]). The parent studies were supported by the Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01 HD32257-05; R01 HD037701-03; NICHD R01 HD043688-01; K24HD058795) and by the Bill and Melinda Gates Foundation through the World Health Organization (Award Number 2011/133255-0). The authors declare no conflicts of interest. |
Vol 192
P. 66 - janvier 2018 Retour au numéro
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