Association between the Degree of Twin Birthweight Discordance and Perinatal Outcomes

Autor: Yvonne W. Cheng, Aaron B. Caughey, Lynn M. Yee, Lena H. Kim
Rok vydání: 2018
Předmět:
Zdroj: American Journal of Perinatology. 36:969-974
ISSN: 1098-8785
0735-1631
DOI: 10.1055/s-0038-1675769
Popis: Background Twin birthweight discordance is associated with adverse outcomes. Objective To determine what degree of twin birthweight discordance is associated with adverse outcomes. Study Design This is a retrospective cohort study of twins with vertex twin A delivered vaginally at 36 to 40 weeks (U.S. Vital Statistics Natality birth certificate registry data 2012–2014). The primary outcome was a composite of neonatal morbidity: 5-minute Apgar 6 hours, neonatal seizure, and/or neonatal transport to a higher level of care. Effect estimates were expressed as incidence rate and adjusted odds ratio (aOR) controlling for confounding using multivariate clustered analysis for between-pair effects, and multilevel random effect generalized estimating equation regressions to account for within-pair effects. We adjusted for sex discordance, breech delivery of the second twin, maternal race/ethnicity, nulliparity, age, marital status, obesity, and socioeconomic status. Results In comparison to birthweight discordance of ≤20%, aORs with 95% confidence intervals (CIs) by weight discordance of the primary outcome among 27,276 twin deliveries were as follows: 20.01 to 25% (aOR: 1.46 [95% CI: 1.29–1.65]); 25.01 to 30% (aOR: 1.96 [95% CI: 1.68–2.29]); and 30.01 to 60% (aOR: 2.97 [95% CI: 2.52–3.50]). Conclusion Twin birthweight discordance >20% was associated with increased odds of adverse neonatal outcome.
Databáze: OpenAIRE