Abstract
Objective Antenatal testing has been implemented for advanced maternal age (AMA) women given
their increased stillbirth risk. Our objective was to evaluate cesarean delivery and
induction rates after the start of antenatal testing at our institution.
Study Design A retrospective cohort study of AMA women (≥ 40 years) who delivered at our institution
was performed. Testing for AMA began in 2005. AMA women who delivered before (unexposed)
and after (exposed) the implementation were compared. Our primary outcome was cesarean
delivery and secondary outcome was induction. Chi-square compared categorical variables
and multivariable logistic regression calculated odds ratio (OR) and controlled for
confounders.
Results A total of 276 women were included (147 unexposed and 129 exposed). The cesarean
rate was higher in the exposed group (53 vs. 39%, OR 1.76 [1.09–2.84]). The increased
risk of cesarean remained after adjusting for race, previous cesarean, multiple gestations,
and parity (adjusted OR 1.85 [1.05–3.28]). When excluding those with previous cesareans,
the risk of primary cesarean was not significant (OR 1.57 [0.89–2.76]). The induction
rate was not different (38 vs. 33%, p = 0.4).
Conclusions While overall cesareans increased, there was no difference in primary cesarean and
induction rates for AMA women after implementation of antenatal testing for AMA.
Keywords
advanced maternal age - antenatal testing - cesarean - induction