Table 1.
Characteristics of patients and control individuals
| Control | ||
| Characteristics | Patients (n [%]) | individuals (n [%]) |
| Age at diagnosis or check up (years) | ||
| 30-39 | 18 (9.0) | 14 (7.7) |
| 40-49 | 72 (36.3) | 39 (21.4) |
| 50-59 | 69 (34.3) | 71 (39.0) |
| 60-69 | 41 (20.4) | 58 (31.9) |
| Age at menarche (years) | ||
| -13 | 92 (46.0) | 89 (48.9) |
| 14-15 | 84 (42.0) | 65 (35.7) |
| 16+ | 23 (11.5) | 28 (15.4) |
| No recall | 1 (0.5) | 0 (0.0) |
| Menopause | ||
| Premenopausal | 108 (54.2) | 95 (52.2) |
| Postmenopausal | 92 (45.8) | 87 (47.8) |
| Body mass index | ||
| <20 | 46 (23.0) | 42 (23.1) |
| 20-24 | 108 (54.0) | 93 (51.1) |
| ≥ 24 | 46 (23.0) | 47 (25.8) |
| Breast cancer family history, in mother and/or sister(s) | ||
| No | 175 (87.6) | 178 (97.8) |
| Yes | 25 (12.4) | 4 (2.2) |
The total number of cases was 200, and that of control individuals was 182.