Explanatory variable | Category | Cases (N = 230) | Controls (N = 230) |
---|---|---|---|
Frequency (%) | Frequency (%) | ||
Sex | Male | 99(43) | 108(47) |
Female | 131(57) | 122(53) | |
Age | 6–11 | 93(40.4) | 81(35.2) |
12–17 | 77(33.5) | 76(33) | |
18–23 | 60(26.1) | 73(31.7) | |
Birth spacing | >= 2 years | 108(47) | 147(64) |
< 2 years | 46(20) | 20(8.7) | |
First child | 76(33) | 63(27.3) |