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Table 1 Background characteristics of study participants (n = 11,387)

From: The association between daily 500 mg calcium supplementation and lower pregnancy-induced hypertension risk in Bangladesh

Characteristics

n

% or Mean ± SD

District

 Mymensingh

5649

49.61

 Rangpur

2270

19.94

 Lalmonirhat

1613

14.17

 Kurigram

1855

16.29

Age (years)

  < 20

2733

24.00

 20–24

3237

28.43

 25–29

3297

28.95

  ≥ 30

2120

18.62

Occupation

 Housewife

11,286

99.11

 Working outside

101

0.89

Parity

 1

2803

24.62

 2

4452

39.10

  ≥ 3

4132

36.29

Number of living children

 None

2715

23.84

 1

5098

44.77

  ≥ 2

3574

31.39

Household type

 Pacca/semi-pacca

1666

14.63

 Tin and others

9721

85.37

Household asset

 Poor

5321

46.73

 Non-poor

6066

53.27

Systolic blood pressure

 Baseline

11,387

99.27 ± 7.27

 Follow up 1

10,151

99.94 ± 8.31

 Follow up 2

10,376

100.75 ± 8.57

 Follow up 3

9358

101.59 ± 9.15

 Follow up 4

5224

102.41 ± 9.63

Diastolic blood pressure

 Baseline

11,387

62.50 ± 6.99

 Follow up 1

10,151

63.77 ± 7.76

 Follow up 2

10,377

64.52 ± 7.97

 Follow up 3

9356

65.43 ± 8.48

 Follow up 4

5225

66.06 ± 8.80

Weight (kg)

 Baseline

11,387

49.02 ± 8.03

 Follow up 1

10,111

50.46 ± 7.99

 Follow up 2

10,369

51.98 ± 8.04

 Follow up 3

9363

53.58 ± 8.20

 Follow up 4

5221

54.93 ± 8.28

  1. Baseline = 5th gestational month, Follow up 1–4 = 6th – 9thgestational month