Table 1 Selected characteristics for matched breast cancer cases and control subjects
Cases | Controls | OR | |
|---|---|---|---|
N (%) | N (%) | (95% CI) a | |
Age | |||
⩽39 | 79 (27.4) | 79 (27.4) | |
40–49 | 90 (31.3) | 90 (31.3) | |
50–59 | 74 (25.7) | 74 (25.7) | |
⩾60 | 45 (15.6) | 45 (15.6) | |
Education | |||
Under high school | 154 (54.2) | 204 (71.6) | 1.0 |
At and over high school | 130 (45.8) | 81 (28.4) | 2.1 (1.5–3.0) |
Age at first full-term pregnancy (FFTP) | |||
FFTP<30 | 242 (84.0) | 259 (90.2) | 1.0 |
Nulliparous or FFTP⩾30 | 46 (16.0) | 28 (9.8) | 1.8 (1.1–2.9) |
Family history of breast cancer in first and second degree relatives | |||
No | 263 (91.3) | 278 (96.5) | 1.0 |
Yes | 25 (8.7) | 10 (3.5) | 2.6 (1.2–5.6) |
Alcohol consumption | |||
<1/month | 208 (72.2) | 229 (79.5) | 1.0 |
⩾1/month | 80 (27.8) | 59 (20.5) | 1.5 (1.0–2.2) |
Cigarette smoking | |||
<400 cigarettes/lifetime | 270 (93.8) | 271 (94.1) | 1.0 |
⩾400 cigarettes/lifetime | 18 (6.3) | 17 (5.9) | 1.1 (0.5–2.1) |
aORs were not adjusted for other covariates. | |||
