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Table 2 Frequency of perinatal outcomes according to maternal age group

From: The effect of advanced maternal age on perinatal outcomes in nulliparous singleton pregnancies

  Maternal Age Groups p
Perinatal Outcomes Total < 35 years (a) (n = 471) 35–39 years (b) (n = 399) ≥40 years (c) (n = 87) a vs.b a vs. c b vs. c
Gestational diabetes mellitus 101 27 (5.7) 57 (14.3) 15 (17.2) < 0.001 < 0.001 0.041
Gestational hypertension 58 20 (4.2) 29 (7.2) 8 (9.2) < 0.001 < 0.001 0.035
Pre-eclampsia 62 22 (4.6) 31 (7.7) 8 (9.2) 0.033 < 0.001 0.457
Ablatio placenta 7 2 (0.4) 4 (1.0) 1 (1.1) 0.073 0.051 0.865
Spontaneous preterm delivery before 34 weeks 83 39 (8.2) 36 (9.0) 7 (8.0) 0.469 0.754 0.601
Spontaneous late preterm delivery between 34 and 37 weeks of gestation 71 34 (7.2) 28 (7.0) 9 (10.3) 0.342 0.044 0.038
Prolonged rupture of membranes 41 21 (4.5) 16 (4.0) 4 (4.6) 0.780 0.913 0.612
Small for gestational age 80 21 (4.5) 48 (12.0) 11 (11.5) < 0.001 < 0.001 0.560
Large for gestational age 21 7 (1.5) 12 (3.0) 2 (2.3) 0.072 0.134 0.411
Placenta previa 24 13 (2.8) 9 (2.2) 2 (2.3) 0.613 0.218 0.891
Post-term pregnancy 66 41 (8.7) 21 (5.3) 4 (4.6) 0.021 < 0.001 0.139
Operative vaginal delivery 16 9 (1.9) 6 (1.5) 1 (1.1) 0.451 0.112 0.207
Cesarean delivery 396 175 (37.1) 167 (41.8) 44 (50.5) 0.029 < 0.001 0.040
  1. Data are presented as n (%)