Table 1 Characteristics of cancer cases and non‐cases at baseline.
| Cases (n = 180), n (%) | Non‐cases (n = 3183), n (%) | |
|---|---|---|
| Year of birth | ||
| 1925–29 | 73 (40.6) | 935 (29.4) |
| 1930–34 | 65 (36.1) | 916 (28.8) |
| 1935–39 | 19 (10.6) | 366 (11.5) |
| 1940–44 | 10 (5.6) | 163 (5.1) |
| 1945–49 | 6 (3.3) | 281 (8.8) |
| 1950–54 | 6 (3.3) | 322 (10.1) |
| 1955–58 | 1 (0.6) | 200 (6.3) |
| Marital status | ||
| Never married | 1 (0.6) | 29 (0.9) |
| Married | 162 (90.0) | 2894 (90.9) |
| Divorced | 2 (1.1) | 22 (0.7) |
| Widowed | 15 (8.3) | 238 (7.5) |
| Alcohol consumption | ||
| Never | 150 (83.3) | 2608 (81.9) |
| <1/month | 18 (10.0) | 432 (13.6) |
| 1–3/month | 1 (0.6) | 49 (1.5) |
| 1/week | 6 (3.3) | 25 (0.8) |
| 2+/week | 5 (2.9) | 69 (2.2) |
| Smoking status | ||
| Never | 159 (88.3) | 3039 (95.5) |
| Former smoker | 5 (2.8) | 26 (0.8) |
| Current smoker | 16 (8.9) | 118 (3.7) |
| Number of live birth | ||
| 1 | 18 (10.3) | 750 (24.5) |
| 2 | 30 (17.1) | 573 (18.7) |
| ⩾3 | 127 (72.6) | 1736 (56.8) |
| Age at first live birth | ||
| 19 or less | 23 (13.1) | 266 (8.7) |
| 20–24 | 83 (47.4) | 1302 (42.6) |
| 25–29 | 49 (28.0) | 1154 (37.7) |
| 30 or older | 20 (11.4) | 337 (11.0) |
| Daily oral contraceptive use | ||
| Never | 161 (89.4) | 2764 (86.8) |
| Ever | 19 (10.6) | 419 (13.2) |