Table 1.
Demographic data for cases and controls. Figures are numbers (percentage) of women
| Cases (n=588) | Controls (n=2350) | |
|---|---|---|
| Ethnic group (%): | ||
| White | 448 (76.2) | 1986 (84.5) |
| Black | 98 (16.6) | 263 (11.2) |
| Other | 42 (7.2) | 101 (4.3) |
| Mean (SD) age (years) | 29.6 (5.8) | 28.7 (5.6) |
| Class (%): | ||
| Non-manual | 342 (58.2) | 1347 (57.3) |
| Manual | 111 (18.8) | 524 (22.3) |
| Unemployed | 85 (14.5) | 268 (11.4) |
| Unknown | 50 (8.5) | 209 (8.9) |
| Marital status (%): | ||
| Married | 349 (59.3) | 1398 (59.5) |
| Single supported | 199 (33.8.0) | 801 (34.1) |
| Single unsupported | 32 (5.5) | 108 (4.6) |
| Divorced | 8 (1.4) | 35 (1.5) |
| Unknown | 0 | 9 (0.4) |
| Parity (%): | ||
| 0 | 247 (42.0) | 752 (32.0) |
| 1 | 153 (26.0) | 705 (30.0) |
| 2 | 82 (14.0) | 423 (18.0) |
| ⩾3 | 106 (18.0) | 470 (20.0) |