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 |