Skip to main content

Table 2 Demographic characteristics of subjects by ethnicity

From: Progesterone Receptor (PGR) gene polymorphism is associated with susceptibility to preterm birth

Characteristics

Malays (N = 480)

Indians (N = 94)

Chinese (N =93)

 

Term (N = 388)

Preterm (N = 92)

P value

Term (N = 74)

Preterm (N = 20)

P value

Term (N = 70)

Preterm (N = 23)

P value

Maternal age

29.2 ± 5.6

29.8 ± 4.1

0.249

30.0 ± 3.7

30.3 ± 3.7

0.938

25.9 ± 3.6

29.4 ± 3.5

0.946

Maternal BMI (kg/m2)

24.3 ± 5.6

24.6 ± 5.4

0.267

25.6 ± 5.7

24.2 ± 5.5

0.550

23 ± 5.5

24.8 ± 4.5

0.329

Married subjects (%)

100

99

0.974

98

99

0.961

100

99

0.920

Gestational diabetes (%)

0

8.0

0.000

0

10

0.004

0

20

0.000

History of PTB (%)

0

14

0.000

0

15

0.000

0

12

0.005

Previous miscarriage (%)

14

24

0.017

19

26

0.511

17

28

0.288

Low income (%)

2.8

3.0

 

3

5

 

1

0

 

Average income (%)

29

35

0.212

55

31

0.161

27

36

0.593

High income (%)

68

61

 

41

63

 

72

64

 
  1. Data are express as mean ± SD for continuous data and as percentage for categorical data
  2. P values were obtained using Mann–Whitney U test or independent t test
  3. P-values <0.05 were considered significant