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Table 2 Maternal and neonatal characteristics by perinatal care intensity level

From: Intensity of perinatal care, extreme prematurity and sensorimotor outcome at 2 years corrected age: evidence from the EPIPAGE-2 cohort study

Variable

Levels

Low

Medium

High

p value

  

n

%

n

%

n

%

 

Gestational age at delivery (N = 1112)

 

22

39

10.9

34

8.9

30

8.0

< 0.001

 

23

43

12.0

50

13.2

36

9.6

 
 

24

88

24.6

79

20.8

50

13.4

 
 

25

75

21.0

103

27.1

115

30.8

 
 

26

113

31.6

114

30.0

143

38.2

 

Maternal length of stay prior to delivery (N = 1059)

 

< 24 h

259

74.6

270

74.4

246

70.5

0.59

 

24 to < 48 h

55

15.8

52

14.3

56

16.0

 
 

48 to < 72 h

16

4.6

20

5.5

18

5.2

 
 

72+ h

17

4.9

21

5.8

29

8.3

 

Multiple pregnancy (N = 1112)

 

No

266

74.3

258

67.9

264

70.6

0.16

 

Yes

92

25.7

122

32.1

110

29.4

 

Foetal sex (N = 1105)

 

Male

178

50.3

180

47.6

178

47.7

0.72

 

Female

176

49.7

198

52.4

195

52.3

 

Maternal age group (N = 1105)

 

< 25 years

81

22.6

65

17.1

71

19.4

0.16

 

25-29 years

99

27.6

121

31.8

119

32.4

 
 

30-34 years

94

26.3

123

32.4

105

28.6

 
 

≥ 35 years

84

23.5

71

18.7

72

19.6

 

Mother born outside of France (N = 1033)

 

No

239

72.9

259

74.9

261

72.7

0.78

 

Yes

89

27.1

87

25.1

98

27.3

 

Single mother (N = 1044)

 

Yes

38

11.2

38

10.7

38

10.8

0.97

 

No

300

88.8

317

89.3

313

89.2

 

Family SES (N = 983)

 

Professional

64

20.0

49

14.9

95

28.4

0.01

 

Intermediate

62

19.4

56

17.1

48

14.3

 
 

Administrative, public service, self-employed, students

75

23.4

101

30.8

77

23.0

 
 

Shop assistants, service workers

45

14.1

49

14.9

43

12.8

 
 

Manual workers

49

15.3

47

14.3

51

15.2

 
 

Unemployed

25

7.8

26

7.9

21

6.3

 

Primiparous (N = 1101)

 

No

161

45.6

162

43.1

159

42.7

0.70

 

Yes

192

54.4

214

56.9

213

57.3

 

Maternal fertility treatment (N = 1069)

 

No

291

85.3

294

79.5

279

77.9

0.03

 

Yes

50

14.7

76

20.5

79

22.1

 

pPROM (N = 1053)

 

No

208

60.6

212

58.4

219

63.1

0.44

 

Yes

135

39.4

151

41.6

128

36.9

 

Chorioamnionitis diagnosed < 48 h to delivery (N = 930)

 

No

190

65.1

221

70.4

240

74.1

0.05

 

Yes

102

34.9

93

29.6

84

25.9

 

SGA (N = 1037)

 

Yes

83

25.0

77

21.8

88

25.1

0.50

 

No

249

75.0

277

78.2

263

74.9

 

Spontaneous labour (N = 908)

 

None

64

23.1

71

22.8

76

23.8

0.96

 

Spontaneous

213

76.9

240

77.2

244

76.2

 

Spontaneous rupture of membranes (N = 981)

 

No

130

39.8

130

40.0

138

42.0

0.82

 

Yes

197

60.2

195

60.0

191

58.0

 

Foetal presentation (N = 924)

 

Cephalic

139

50.0

177

55.8

183

55.6

0.19

 

Breech

128

46.0

120

37.8

133

40.4

 
 

Other

11

4.0

20

6.3

13

4.0