Table 1. DistributionA of selected characteristics between cases and controls.
| Discovery Set (MAY-NCO) | Replication Set 1 (AUS) | ||||||||
| Characteristic | Cases | Controls | Characteristic | Cases | Controls | ||||
| N | 397 | 920 | N | 436 | 1098 | ||||
| Age, yr [mean (SD)] | 59.9 | (11.2) | 57.2 | (12.7) | Age, yr [mean (SD)] | 59.9 | (9.95) | 57.2 | (11.8) |
| Age at menarche, yr | Age at menarche, yr | ||||||||
| <12 | 83 | (23.6) | 152 | (16.8) | <12 | 77 | (17.9) | 192 | (17.9) |
| 12 | 84 | (23.9) | 239 | (26.4) | 12 | 102 | (23.7) | 234 | (21.8) |
| 13 | 97 | (27.6) | 266 | (29.3) | 13 | 109 | (25.4) | 289 | (23.9) |
| ≥14 | 88 | (25.0) | 250 | (27.6) | ≥14 | 142 | (33.0) | 358 | (33.4) |
| Oral contraceptive use, mo | Oral contraceptive use | ||||||||
| Never | 168 | (43.6) | 314 | (34.7) | No | 143 | (32.8) | 219 | (20.0) |
| 1–48 | 108 | (28.1) | 223 | (24.6) | Yes | 292 | (67.0) | 879 | (80.1) |
| ≥48 | 109 | (28.3) | 368 | (40.7) | |||||
| Parity, n/age at first birth, yr | Full-term births, n | ||||||||
| Nulliparous | 64 | (16.1) | 128 | (14.0) | 0 | 61 | (14.0) | 117 | (10.7) |
| 1–2/≤20 | 42 | (10.6) | 81 | (8.8) | 1 | 45 | (10.3) | 91 | (8.3) |
| 1–2/≥20 | 127 | (32.0) | 341 | (37.2) | 2 | 124 | (28.5) | 359 | (32.7) |
| ≥3/≤20 | 76 | (19.1) | 124 | (13.5) | 3 | 109 | (25.1) | 311 | (28.3) |
| ≥3/≥20 | 88 | (22.2) | 242 | (26.4) | >3 | 96 | (27.1) | 220 | (20.0) |
| Tumor stage | Tumor stage | ||||||||
| I | 26 | (6.7) | I | 27 | (6.5) | ||||
| II | 21 | (5.4) | II | 26 | (6.2) | ||||
| III | 282 | (72.5) | III | 320 | (76.7) | ||||
| IV | 60 | (15.4) | IV | 44 | (10.6) | ||||
A
Data are counts (%) except for age. Sample is 1,317 Caucasian subjects in the discovery set and 1,534 Caucasian subjects in replication set 1.