Table 1 Maternal characteristics and perinatal outcomes

Case (n)

188

56

117

15

Gestational age (weeks) ^a, Mean ± SD

37.1 ± 3.31

34.6 ± 3.48

38.3 ± 2.62

37.1 ± 1.97

Maternal age (years) ^a, Mean ± SD

33.3 ± 5.82

33.0 ± 5.08

33.7 ± 6.22

31.2 ± 4.28

Maternal BMI (kg/m²) ^a, Mean ± SD

23.0 ± 4.87

23.2 ± 4.50

23.3 ± 5.09

20.2 ± 1.78

Nulliparity [n (%)] ^b

115 (61.2)

27 (48.2)

84 (71.8)

4 (26.7)

Diabetes mellitus [n (%)] ^b

15 (8.0)

2 (3.6)

13 (11.1)

0

ART [n (%)] ^b

24 (13.0)

5 (9.1)

19 (16.5)

0

Systolic pressure ^a, Mean ± SD

168.5 ± 20.86

175.6 ± 14.17

170.3 ± 18.73

127.7 ± 9.12

Diastolic pressure ^a, Mean ± SD

98.3 ± 15.37

105.5 ± 11.01

98.2 ± 13.83

71.9 ± 11.13

Onset (weeks) ^a, Mean ± SD

33.8 ± 4.77

30.7 ± 4.60

35.2 ± 4.08

Onset [n (%)] ^b

 Early onset

68 (39.3)

38 (67.9)

30 (25.6)

 Late onset

105 (60.7)

18 (32.1)

87 (74.4)

Hypertension [n (%)] ^b

 Mild (≥140/90 mmHg)

43 (24.9)

6 (10.7)

37 (31.6)

 Severe (≥160/110 mmHg)

130 (75.1)

50 (89.3)

80 (68.4)

Proteinuria [n (%)] ^c

 Negative

96 (55.5)

17 (30.4)

79 (67.5)

 Mild (≥300 mg, < 2 g)

35 (20.2)

16 (28.6)

19 (16.2)

 Severe (≥2g)

42 (24.3)

23 (41.1)

19 (16.2)

Placental weight [n (%)] ^b

 <10 percentile

20 (13.1)

10 (21.3)

9 (9.9)

1 (6.7)

 ≥10 percentile

133 (86.9)

37 (78.7)

82 (90.1)

14 (93.3)

Unknown (n)

35

9

26

0

Birth weight (grams) ^a, Mean ± SD

2364.8 ± 757.18

1778.2 ± 728.20

2608.4 ± 640.96

2654.4 ± 363.52

Small for gestational age [n (%)] ^b

58 (30.9)

31 (55.4)

27 (23.1)

0

Infant sex [n (%)] ^b

 Female

94 (50.0)

26 (46.4)

63 (53.8)

5 (33.3)

 Male

94 (50.0)

30 (53.6)

54 (46.2)

10 (66.7)

Umbilical artery pH ^a, Mean ± SD

7.291 ± 0.075

7.283 ± 0.075

7.295 ± 0.069

7.293 ± 0.106

Apgar score at 1 min ^a, Mean ± SD

7.4 ± 1.36

6.9 ± 1.52

7.7 ± 1.17

7.6 ± 1.54

Apgar score at 5 min ^a, Mean ± SD

8.7 ± 0.84

8.5 ± 1.05

8.8 ± 0.70

8.9 ± 0.68