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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 (%)