Table 1.
The distribution of women in the control group (n = 2167) and patients with breast cancer (n = 1492) according to the factors including age, education, body mass index (BMI), smoking and alcohol intake.
| Factors | women in the control group (n = 2167) |
patients with breast cancer (n = 1492) |
| Age (years) | ||
| ≥ 35 <35 |
1625 (75.0%) 541 (25.0%) |
1410 (94.5%) 82 (5.5%) |
| 35–39 | 253 (11.7%) | 120 (8.2%) |
| 40–49 | 636 (29.3%) | 410 (27.5%) |
| ≥ 50 | 737 (34.0%) | 880 (58.8%) |
| Education (years) | ||
| <13 | 1110 (51.2%) | 891 (59.7%) |
| ≥ 13 | 1057 (48.8%) | 601 (40.3%) |
| Body mass index (BMI-kg/m2) | ||
| <25 | 971 (44.8%) | 534 (35.8%) |
| ≥ 25 | 1196 (55.2%) | 958 (64.2%) |
| Smoking | ||
| Never | 1517 (70.0%) | 1141 (76.5%) |
| Ever | 650 (30.0%) | 351 (23.5%) |
| Alcohol intake | ||
| Never | 2166 (99.99%) | 1489 (99.98%) |
| Ever | 1 (0.01%) | 3 (0.02%) |
| Family history of breast cancer [first-degree relative(s)] | ||
| No | 2059 (95.0%) | 1384 (92.8%) |
| Yes | 108 (5.0%) | 108 (7.2%) |