Effect of Fetal Growth on 1-Year Mortality in Neonates With Critical Congenital Heart Disease
- PMID: 30371167
- PMCID: PMC6201429
- DOI: 10.1161/JAHA.118.009693
Effect of Fetal Growth on 1-Year Mortality in Neonates With Critical Congenital Heart Disease
Abstract
Background Infants with critical congenital heart disease ( CCHD ) are more likely to be small for gestational age (GA). It is unclear how this affects mortality. The authors investigated the effect of birth weight Z score on 1-year mortality separately in preterm (GA <37 weeks), early-term (GA 37-38 weeks), and full-term (GA 39-42 weeks) infants with CCHD . Methods and Results Live-born infants with CCHD and GA 22 to 42 weeks born in California 2007-2012 were included in the analysis. The primary predictor was Z score for birth weight and the primary outcome was 1-year mortality. Multivariable logistic regression was used. Results are presented as adjusted odds ratios and 95% confidence intervals ( CIs ). The authors identified 6903 infants with CCHD . For preterm and full-term infants, only a Z score for birth weight <-2 was associated with increased mortality compared with the reference group ( Z score 0-0.5, adjusted odds ratio, 2.15 [95% CI , 1.1-4.21] and adjusted odds ratio, 3.93 [95% CI , 2.32-6.68], respectively). In contrast, in early-term infants, the adjusted odds ratios for Z scores <-2, -2 to -1, and -1 to -0.5 were 3.42 (95% CI , 1.93-6.04), 1.78 (95% CI , 1.12-2.83), and 2.03 (95% CI , 1.27-3.23), respectively, versus the reference group. Conclusions GA seems to modify the effect of birth weight Z score on mortality in infants with CCHD . In preterm and full-term infants, only the most severe small-for-GA infants ( Z score <-2) were at increased risk for mortality, while, in early-term infants, the risk extended to mild to moderate small-for-GA infants ( Z score <-0.5). This information helps to identify high-risk infants and is useful for surgical planning.
Keywords: birth weight Z score; congenital cardiac defect; congenital heart disease; fetal growth; mortality.
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Comment in
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Growth in Congenital Heart Disease: Outcome or Predictor?J Am Heart Assoc. 2018 Sep 4;7(17):e010262. doi: 10.1161/JAHA.118.010262. J Am Heart Assoc. 2018. PMID: 30371175 Free PMC article. No abstract available.
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