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Table 5 Association of maternal age with adverse perinatal outcomes

From: The trend in delayed childbearing and its potential consequences on pregnancy outcomes: a single center 9-years retrospective cohort study in Hubei, China

Perinatal traits Maternal age groups
G1 (< 30 years)
aOR (95% CI)
G2 (30–34 years)
aOR (95% CI)
G3 (≥35 years)
aOR (95% CI)
Preterm birth 1.00 (reference) 1.1 (0.9, 1.2) 1.6 (1.4, 1.7)
Perinatal mortality 1.00 (reference) 0.8 (0.6, 1.1) 1.8 (1.3, 2.3)
LBW 1.00 (reference) 0.9 (0.8, 1.1) 1.3 (1.2, 1.4)
IUGR 1.00 (reference) 0.9 (0.6, 1.2) 0.7 (0.4, 1.1)
LPI 1.00 (reference) 1.0 (0.8, 1.2) 1.1 (0.9, 1.3)
Low Apgar score 1.00 (reference) 0.9 (0.8, 1.1) 1.3 (1.1, 1.6)
Fetal hypoxia 1.00 (reference) 1.1 (0.8, 1.3) 1.1 (0.8, 1.4)
Macrosomia 1.00 (reference) 1.2 (1.1, 1.4) 1.1 (0.9, 1.3)
Congenital defects 1.00 (reference) 0.8 (0.6, 1.1) 0.9 (0.7, 1.3)
  1. aOR Adjusted odds ratios, LBW Low birth weight, IUGR Intrauterine growth restriction, LPI Low ponderal index, Adjusted for prepregnancy body weight, parity, neonatal gender, maternal education, and occupation;