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Table 2 Baseline characteristics and previous pregnancy outcomes of randomized non-pregnant women (n = 1354)

From: Participant recruitment and retention in longitudinal preconception randomized trials: lessons learnt from the Calcium And Pre-eclampsia (CAP) trial

Country

Baseline characteristics

Previous pregnancy outcomes

Age

Parity

Time since last complicated birth (months)

Baby born alive

Gestational age at delivery

Eclampsia and/or HELLP syndrome

Onset of pre-eclampsia (weeks)

n

Mean [SD]

n

Mean [SD]

n

Mean [SD]

Median (IQR)

n

%

N

Mean [SD]

n

%

n

Mean [SD]

Argentina

117

29.4 [7.3]

117

1.6 [1.0]

117

15.7 [17.8]

8.9 (15.0)

111

94.9

116

35.2 [4.0]

21

18.1

111

32.6 [5.3]

South Africa

955

30.2 [5.7]

955

1.9 [1.0]

909

25.6 [37.2]

10.4 (33.5)

467

48.9

765

30.5 [6.1]

246

29.9

655

28.0 [6.5]

Zimbabwe

282

30.7 [5.6]

282

2.3 [1.3]

266

20.7 [24.8]

11.5 (18.7)

107

37.9

277

30.9 [5.5]

66

24.4

267

27.9 [5.7]

Total

1354

30.3 [5.9]

1354

2.0 [1.1]

1292

23.7 [33.7]

10.5 (29.4)

685

50.6

1158

31.1 [6.0]

333

27.5

1033

28.4 [6.3]

  1. Abbreviations: IQR interquartile range, n number of participants, SD standard deviation, HELLP hemolysis, elevated liver enzymes and low platelets