Risk factor | Cases (%) | Control (%) | OR (95% CI) |
---|---|---|---|
 | n = 1,011 | n = 1,011 |  |
Age (yrs) (mean ± SD) | 47.7 ± 10.9 | 47.7 ± 11.7 | p = 0.984* |
Education | Â | Â | Â |
Under or at middle school | 315 (31.3) | 319 (31.7) | 1.0 |
At high school | 378 (37.5) | 407 (40.5) | 1.0 (0.80–1.24) |
At or over college | 315 (31.3) | 280 (27.8) | 1.2 (0.98–1.57) |
FHBC ‡ |  |  |  |
No | 937 (92.7) | 976 (96.5) | 1.0 |
Yes | 74 (7.3) | 35 (3.5) | 2.2 (1.47–3.38) |
Age at FFTP ‡ (yrs) or nulliparity |  |  |  |
<25 | 325 (32.2) | 349 (34.9) | 1.0 |
25–29 | 477 (47.3) | 471 (47.1) | 1.1 (0.92–1.38) |
≥30 or nulliparity | 206 (20.4) | 181 (18.1) | 1.3 (1.04–1.76) |
P for trend | Â | Â | p = 0.027 |
LEE ‡ (yrs) (mean ± SD) | 29.1 ± 6.9 | 28.3 ± 7.4 | 1.2 (1.05–1.41)†|
BMI (kg/m 2 ) | Â | Â | Â |
<25.0 | 748 (74.4) | 769 (76.8) | 1.0 |
25.0–29.9 | 227 (22.6) | 216 (21.6) | 1.0 (0.84–1.29) |
≥30.0 | 31 (3.1) | 16 (1.6) | 2.0 (1.07–3.78) |
Smoking status | Â | Â | Â |
Nonsmoker | 933 (92.4) | 943 (93.4) | 1.0 |
Smoker | 77 (7.6) | 67 (6.6) | 1.2 (0.85–1.70) |
Alcohol drinking | Â | Â | Â |
<1/month | 756 (74.8) | 709 (72.3) | 1.0 |
1–3/month | 178 (17.6) | 211 (21.5) | 0.8 (0.64–1.02) |
≥1/week | 77 (7.6) | 61 (6.2) | 1.2 (0.86–1.76) |