Cases (n = 280) | Controls (n = 285) | p | |||
---|---|---|---|---|---|
No. | % | No. | % | ||
*Matching variables. | |||||
NS: p > 0.05. | |||||
Sex | |||||
Male | 166 | 59.3 | 166 | 58.3 | NS |
Age* (y) | |||||
<2 | 33 | 11.8 | 51 | 17.8 | |
2–3 | 85 | 30.4 | 52 | 18.3 | |
4–6 | 83 | 29.6 | 78 | 27.4 | |
7–10 | 41 | 14.6 | 63 | 22.1 | |
⩾11 | 38 | 13.6 | 41 | 14.4 | <0.01 |
Centre* | |||||
Lille | 39 | 13.9 | 26 | 9.1 | |
Lyon | 36 | 12.9 | 35 | 12.3 | |
Nancy | 23 | 8.2 | 22 | 7.7 | |
Paris | 182 | 65.0 | 202 | 70.9 | NS |
Origin* | |||||
European | 244 | 87.1 | 236 | 82.8 | |
North African | 15 | 5.4 | 23 | 8.1 | |
Other | 21 | 7.5 | 26 | 9.1 | NS |
Socioeconomic status | |||||
High | 147 | 52.5 | 160 | 55.1 | |
Intermediate | 55 | 19.6 | 49 | 17.2 | |
Low | 78 | 27.9 | 75 | 26.3 | NS |
Missing value | 0 | 0.0 | 1 | 0.4 | |
Education of mother | |||||
>High school | 90 | 32.1 | 108 | 37.9 | |
⩽High school | 190 | 67.9 | 175 | 61.4 | NS |
Missing value | 0 | 0.0 | 2 | 0.7 | |
Education of father | |||||
>High school | 87 | 31.1 | 99 | 34.7 | |
⩽High school | 181 | 64.6 | 170 | 59.7 | NS |
Missing value | 12 | 4.3 | 16 | 5.6 | |
Family situation | |||||
Couple | 247 | 88.2 | 242 | 84.9 | |
Widow/separate | 26 | 9.3 | 35 | 12.3 | |
Single | 7 | 2.5 | 5 | 1.8 | NS |
Missing values | 0 | 0.0 | 3 | 1.1 | |
Type of dwelling | |||||
Urban | 221 | 78.9 | 234 | 82.1 | |
Rural | 58 | 20.7 | 49 | 17.2 | NS |
Missing value | 1 | 0.4 | 2 | 0.7 |