Table 1 Demographics and clinical characteristics.

Sample size, n

693

342

61

74

112

Maternal age, y, mean (± SD)

24.4 (± 6.2)

25.2 (± 6.8)

31.1 (± 6.9)^a

20.5 (± 6.1)^a

27.0 (± 6.7)^a

SBP, mmHg, mean (± SD)

117 (± 12)

156 (± 19)^a

166 (± 28)^a

159 (± 21)^a

154 (± 21)^a

DBP, mmHg, mean (± SD)

75 (± 9)

105 (± 13)^a

108 (± 14)^a

108 (± 16)^a

101 (± 13)^a

Proteinuria, n (%)

Negative

693 (100)

0 (0.0)

0 (0.0)

2 (2.7)

7 (6.3)

1 +

–

104 (30.4)

28 (45.9)

11 (14.9)

13 (11.6)

≥ 2 +

–

238 (69.6)

16 (26.2)

43 (58.1)

85 (75.8)

Missing

–

0 (0.0)

17 (27.9)

18 (24.3)

7 (6.3)

Primigestas, n (%)

300 (43.3)

180 (52.8)^a

14 (23.3) ^a

54 (73.0)^a

46 (41.4)

Gestational age at delivery, w, mean (± SD)

38.8 (± 3.1)

37.2 (± 3.0)^a

35.8 (± 3.5)^a

36.2 (± 3.6)^a

34.3 (± 4.0)^a

Number of antenatal care visits, mean (± SD)

5.9 (± 2.8)

6.2 (± 2.3)

6.1 (± 2.9)

4.5 (± 2.5)^a

5.3 (± 2.3)^a

Family history of

Chronic hypertension^b

238 (35.5)

178 (56.9)^a

46 (80.7)^a

32 (46.4)

55 (49.6)^a

Preeclampsia^c

22 (3.8)

41 (15.9)^a

5 (10.9)^a

12 (21.0)^a

8 (8.3)^a

Eclampsia^c

7 (1.2)

11 (4.4)^a

3 (6.5)^a

5 (8.8)^a

2 (2.1)