Table 1 Description of sociodemographic characteristics of population (n = 3159)
Variable | N | % | Variable | N | % | |
|---|---|---|---|---|---|---|
Child's sex | Maternal tobacco status in early pregnancy | |||||
Male | 1613 | 51.1 | Non smoker | 2250 | 72.0 | |
Female | 1545 | 48.9 | Former smoker | 442 | 14.1 | |
Missing | 1 | Smoker | 433 | 13.9 | ||
Level of urbanization | Missing | 34 | ||||
Urban | 660 | 20.9 | Maternal alcohol consumption in early pregnancy | |||
Rural | 2499 | 79.1 | Never/occasionally | 2661 | 85.2 | |
Districts of inclusion | ≤ 1 drink/day | 405 | 13.0 | |||
Ille-et-Vilaine | 2076 | 65.7 | > 1 drink/day | 56 | 1.8 | |
Côtes d'Armor - Finistère | 1083 | 34.3 | Missing | 37 | ||
Year of inclusion | Parity | |||||
2002 | 388 | 12.3 | 0 | 1406 | 44.6 | |
2003 | 1203 | 38.1 | 1 | 1171 | 37.2 | |
2004 | 1110 | 35.1 | ≥ 2 | 572 | 18.2 | |
2005 - beginning 2006 | 458 | 14.5 | Missing | 10 | ||
Gestational age at inclusion (weeks of amenorrhea) (mean (min-max)) | 11.7 (3.0-19.0) | Marital status | ||||
Couple | 3079 | 97.6 | ||||
Season in early pregnancy | Single | 75 | 2.4 | |||
Spring | 768 | 24.3 | Missing | 5 | ||
Summer | 880 | 27.9 | Gestational or preexisting diabetes | |||
Fall | 737 | 23.3 | No | 2981 | 96.3 | |
Winter | 774 | 24.5 | Yes | 116 | 3.7 | |
Maternal age at inclusion (years) | Missing | 62 | ||||
< 25 | 345 | 10.9 | High blood pressure during pregnancy | |||
25-29 | 1259 | 39.9 | No | 2931 | 94.4 | |
30-34 | 1113 | 35.2 | Yes | 174 | 5.6 | |
≥ 35 | 442 | 14.0 | Missing | 54 | ||
BMI before pregnancy (kg/m 2 ) | Delivery with cesarean section | |||||
< 18.5 | 235 | 7.5 | No | 2553 | 82.6 | |
18.5-25 | 2339 | 74.6 | Yes | 536 | 17.4 | |
25-30 | 402 | 12.8 | Missing | 70 | ||
≥ 30 | 159 | 5.1 | ||||
Missing | 24 | |||||
Maternal educational level | ||||||
Primary education | 578 | 18.3 | ||||
Some secondary education | 579 | 18.5 | ||||
High school completed or higher | 1995 | 63.3 | ||||
Missing | 7 | |||||