| All (N = 980) | Events (N = 141) | Model 1a | Model 2b |
---|---|---|---|---|
Age (mean(SD)) | 48 (9.8) | 49 (11.7) | 1.02 (1.00-1.04) | 1.01 (0.99-1.03) |
 ≤39 | 191 (19.5) | 30 (21.3) | 1.00 | 1.00 |
 40-49 | 422 (43.0) | 50 (35.5) | 0.86 (0.54-1.36) | 0.76 (0.48-1.22) |
 50-59 | 241 (24.6) | 34 (24.1) | 1.02 (0.62-1.70) | 0.83 (0.48-1.42) |
 ≥60 | 126 (12.9) | 27 (19.1) | 1.66 (0.97-2.82) | 1.21 (0.67-2.18) |
Menopausal status | Â | Â | Â | Â |
 Pre | 610 (63.0) | 74 (53.6) | 1.00 | 1.00 |
 Post | 359 (37.0) | 64 (46.4) | 1.50 (0.93-2.42) | 1.38 (0.85-2.25) |
BMI, kg/m2 (mean(SD)) | 23 (2.9) | 23 (3.2) | 0.98 (0.92-1.04) | 0.97 (0.91-1.03) |
 <25 | 753 (77.6) | 107 (77.0) | 1.00 | 1.00 |
 ≥25 | 217 (22.4) | 32 (23.0) | 0.85 (0.56-1.28) | 0.79 (0.52-1.20) |
Education | Â | Â | Â | Â |
 Middle school | 224 (22.9) | 46 (32.6) | 1.00 | 1.00 |
 High school | 402 (41.2) | 56 (39.7) | 0.68 (0.45-1.05) | 0.69 (0.45-1.05) |
 College | 351 (35.9) | 39 (27.7) | 0.58 (0.36-0.94) | 0.58 (0.36-0.93) |
Alcohol drinking | Â | Â | Â | Â |
 <1/month | 559 (57.5) | 85 (60.7) | 1.00 | 1.00 |
 1-3/month | 354 (36.4) | 46 (32.9) | 0.83 (0.57-1.21) | 0.83 (0.57-1.22) |
 1+/week | 59 (6.1) | 9 (6.4) | 1.12 (0.56-2.25) | 1.09 (0.54-2.19) |
Recruited sites | Â | Â | Â | Â |
 SNU | 511 (52.1) | 73 (51.8) | 1.00 | 1.00 |
 AMC | 469 (47.9) | 68 (48.2) | 0.92 (0.65-1.30) | 0.89 (0.63-1.26) |
TNM stage | Â | Â | Â | Â |
 I | 400 (40.8) | 25 (17.7) | 1.00 | 1.00 |
 II | 416 (42.5) | 72 (51.1) | 2.78 (1.74-4.44) | 2.71 (1.69-4.35) |
 III | 164 (16.7) | 44 (31.2) | 4.27 (2.57-7.11) | 4.17 (2.50-6.96) |
Tumor size | Â | Â | Â | Â |
 <2 cm | 526 (54.9) | 42 (29.8) | 1.00 | 1.00 |
 ≥2 cm | 431 (44.9) | 99 (70.2) | 2.57 (1.74-3.79) | 2.51 (1.70-3.72) |
 Tx | 2 (0.2) |  |  |  |
Lymph node status | Â | Â | Â | Â |
 Negative | 577 (58.9) | 60 (42.6) | 1.00 | 1.00 |
 Positive | 390 (39.8) | 78 (55.3) | 1.47 (1.03-2.11) | 1.46 (1.02-2.09) |
 Nx | 13 (1.3) | 3 (2.1) |  |  |
Hormone status | Â | Â | Â | Â |
 ER + and/or PR+ | 698 (72.6) | 74 (53.6) | 1.00 | 1.00 |
 ER–/PR– | 264 (27.4) | 64 (46.4) | 2.06 (1.41-3.01) | 2.06 (1.40-3.02) |
Nuclear grade | Â | Â | Â | Â |
 I-II | 525 (55.2) | 57 (41.0) | 1.00 | 1.00 |
 III | 426 (44.8) | 82 (59.0) | 1.15 (0.78-1.69) | 1.12 (0.75-1.65) |