Skip to main content

Table 1 Demographic characteristics of cases and controls in the IPD analysis

From: A better understanding of the association between maternal perception of foetal movements and late stillbirth—findings from an individual participant data meta-analysis

Variable

N = 851

Cases, n or mean

% or s.d.

N = 2257

Controls, n or mean

% or s.d.

Chi-square or t-test (p-value)

Maternal age

      

12.24 (0.06)

 < 20

846

33

3.9

2238

59

2.6

 

 20–24

 

115

13.6

 

274

12.2

 

 25–29

 

228

27.0

 

631

28.2

 

 30–34

 

265

31.3

 

794

35.5

 

 35–39

 

160

18.9

 

396

17.7

 

 40+

 

45

5.3

 

84

3.8

 

Maternal BMI

842

27.7

6.9

2229

26.3

6.1

4.99 (< 0.0001)

Maternal ethnicity

      

21.43 (0.0015)

 White

851

522

61.3

2257

1545

68.5

 

 Black

 

22

2.6

 

42

1.9

 

 South Asian

 

90

10.6

 

219

9.7

 

 South East and East Asian

 

40

4.7

 

111

4.9

 

 Maori

 

46

5.4

 

107

4.7

 

 Pacific

 

91

10.7

 

154

6.8

 

 Others

 

40

4.7

 

79

3.5

 

Parity

      

56.49 (< 0.0001)

 Nulliparous

851

446

52.4

2257

930

41.2

 

 1–2

 

292

34.3

 

1110

49.2

 

 3–4

 

87

10.2

 

176

7.8

 

 5+

 

26

3.1

 

41

1.8

 

Maternal education

      

39.59 (< 0.0001)

 Primary

842

187

22.2

2249

348

15.5

 

 Secondary

 

161

19.1

 

343

15.3

 

 University

 

328

39.0

 

1069

47.5

 

 Post-graduate degree

 

73

8.7

 

240

10.7

 

 Non-university trading education

 

93

11.0

 

249

11.1

 

Marital status

      

22.60 (< 0.0001)

 Not in stable relationship

847

92

10.9

2255

143

6.3

 

 Stable relationship

 

755

89.1

 

2112

93.7

 

Smoking status

      

39.19 (< 0.0001)

 Current smoker

848

145

17.1

2247

205

9.1

 

 Non-smoker or quit smoking before end of 1st trimester

 

703

82.9

 

2042

90.9

 

Gestational age (weeks)

851

36.7

3.6

2257

36.3

3.7

2.64 (0.008)

 28–32

 

151

17.7

 

479

21.2

5.78 (0.06)

 33–36

 

214

25.2

 

523

23.2

 

 37+

 

486

57.1

 

1255

55.6