Skip to main content

Table 3 Association Between Maternal Age and Adverse Perinatal and Neonatal Outcomes

From: The association of maternal age with adverse neonatal outcomes in Lusaka, Zambia: a prospective cohort study

Total (N=11,501)   Crude Odds Ratio 95% CI Adjusted Odds Ratio 95% CI
Neonatal Maternal Age
Low birthweight (<2500 grams) 10-19 1.52** (1.27, 1.84) 1.36** (1.12, 1.66)
20-24 1.00 (ref)  - 1.00 (ref)  -
25-34 1.06 (0.91, 1.24) 1.26* (1.05, 1.51)
35+ 1.18 (0.94, 1.49) 1.61** (1.18, 2.20)
Preterm birth 10-19 1.53** (1.18, 1.98) 1.40* (1.06, 1.84)
20-24 1.00 (ref)  - 1.00 (ref)  -
25-34 1.27* (1.03, 1.56) 1.44** (1.12, 1.85)
35+ 1.49* (1.10, 2.02) 1.80** (1.20, 2.71)
Resuscitation needed at birth 10-19 0.74* (0.57, 0.95) 0.71* (0.54, 0.92)
20-24 1.00 (ref)  - 1.00 (ref)  -
25-34 0.95 (0.80, 1.14) 0.92 (0.74, 1.14)
35+ 0.70* (0.51, 0.96) 0.62* (0.41, 0.93)
Stillbirth 10-19 1.32 (0.81, 2.14) 1.22 (0.74, 2.02)
20-24 1.00 (ref)  - 1.00 (ref)  -
25-34 1.19 (0.81, 1.75) 1.40 (0.90, 2.19)
35+ 1.71 (1.01, 2.88) 2.35* (1.15, 4.78)
Death in first 7 days after birth 10-19 0.98 (0.56, 1.70) 1.04 (0.59, 1.87)
20-24 1.00 (ref)  - 1.00 (ref)  -
25-34 0.97 (0.64, 1.47) 0.84 (0.51, 1.39)
35+ 1.13 (0.60, 2.12) 0.80 (0.34, 1.87)
Death in first 28 days after birth 10-19 0.85 (0.50, 1.44) 0.90 (0.52, 1.57)
20-24 1.00 (ref)  - 1.00 (ref)  -
25-34 0.96 (0.66, 1.40) 0.84 (0.53, 1.32)
35+ 1.2 (0.70, 2.12) 0.88 (0.41, 1.89)
Any adverse neonatal outcomesa 10-19 1.08 (0.92, 1.26) 0.99 (0.84, 1.16)
20-24 1.00 (ref)  - 1.00 (ref)  -
25-34 1 (0.89, 1.13) 1.09 (0.94, 1.26)
35+ 0.97 (0.80, 1.17) 1.10 (0.85, 1.41)
  1. a Occurrence of any one of the following adverse neonatal outcomes: low birthweight, pre-term birth, resuscitation needed after birth, miscarriage, stillbirth, death in the first 7 days after birth, death in first 28 days after birth *p<0.05, **p<0.01