Table 1 Maternal characteristics, overall and by ethnic group.

From: Population reference and healthy standard blood pressure range charts in pregnancy: findings from the Born in Bradford cohort study

 

All (n = 9218)c

White British (n = 3701)

Pakistani (n = 4109)

N

Median (IQR) or %

N

Median (IQR) or %

N

Median (IQR) or %

Number of measuresa

74,770

8 (7, 9)

30,826

9 (8, 10)

32,700

8 (7, 9)

Parity

Nulliparous

3004

40.0

1727

48.2

1277

32.5

Multiparous

4506

60.0

1852

51.8

2654

67.5

Pre-existing hypertension

81

0.9

45

1.2

28

0.7

Pre-existing diabetes (type 1 & 2)

13

0.1

6

0.2

6

0.2

Gestational hypertension

658

7.1

397

10.7

181

4.4

Pre-eclampsia

233

2.5

102

2.8

96

2.3

Gestational diabetes

718

7.8

170

4.6

432

10.5

Preterm delivery

447

4.9

183

4.9

187

4.6

Large for gestational age

373

4.1

232

6.3

98

2.4

Small for gestational age

2351

25.5

682

18.4

1293

31.5

Alcohol during pregnancy

1859

20.2

1640

44.3

17

0.4

Smoked during pregnancy

1526

16.6

1238

33.5

142

3.5

BMI < 18.5 or ≥25.0

5055

54.8

2099

56.7

2256

54.9

Healthy pregnancyb

1790

19.4

426

11.5

1,036

25.2

  1. aNumber of blood pressure measurements per woman following random selection of one measure per two week period of pregnancy.
  2. bHealthy pregnancies are defined as those without medical conditions (has pre-existing hypertension, has existing diabetes or developed gestational diabetes, developed pre-eclampsia) and adverse pregnancy outcomes (pre-term birth, small for gestational age or lagre for gestational age infant) and unhealthy lifestyle characteristics (smoking and drinking alcohol during pregnancy, unhealthy BMI).
  3. cComposed of the following ethnic groups: White British = 3701; Pakistani = 4109; Other ethnicity = 1408.
Back to article page