Table 1.
Characteristics for breast cancer cases and non-breast cancer controls.
| Variable | Cases (N = 735) | Controls (N = 735) | P |
|---|---|---|---|
| Age (years) | 49.6 (8.7) | 48.9 (8.7) | 0.151 |
| Body mass index (kg/m2) | 24.3 (3.5) | 24.3 (3.3) | 0.957 |
| Age at menarche (years) | 15.2 (1.8) | 15.2 (1.7) | 0.903 |
| Hypertension diagnosis (n, %) | 91 (12.4) | 99 (13.5) | 0.534 |
| Type II diabetes diagnosis (n, %) | 38 (5.2) | 26 (3.5) | 0.125 |
| History of cancer (n, %) | 23 (3.1) | 14 (1.9) | 0.134 |
| Smoking (n, %) | 19 (2.6) | 18 (2.5) | 0.868 |
| Alcohol consumption (n, %) | 2 (0.3) | 2 (0.3) | 1.000 |
| Family history of cancer (n, %) | 44 (6.0) | 49 (6.7) | 0.592 |
| Postmenopausal status (n, %) | 298 (40.5) | 247 (33.6) | 0.006 |
| Parity (n, %) | 0.002 | ||
| 0 | 36 (4.9) | 18 (2.5) | |
| 1 | 483 (65.7) | 496 (67.5) | |
| 2 | 178 (24.2) | 203 (27.6) | |
| 3+ | 38 (5.2) | 18 (2.5) |
Unless otherwise specified, variables are presented as the means (standard deviations).