Table 1 Demographic characteristics of the 'breast cancer' and 'screening control' groups.
From: Endostatin gene variation and protein levels in breast cancer susceptibility and severity
CHARACTERISTICS | CASES | CONTROLS | P VALUE | |
|---|---|---|---|---|
Age | N | 847 | 712 | P < 0.01# |
|  | Median (IQR) | 62 (54–70) | 57 (53–61) |  |
Ever Smoked | N | 844 | 712 | P < 0.01~ |
| Â | Yes | 295 (35%) | 316 (44.4%) | Â |
| Â | No | 549 (65%) | 396 (55.6%) | Â |
Post Menopausal | N | 849 | 712 | P = 0.34~ |
| Â | Yes | 547 (64.4%) | 476 (66.9%) | Â |
| Â | No | 302 (35.6%) | 236 (33.1%) | Â |
Age at Menarche | N | 840 | 709 | P = 0.05# |
|  | Median (IQR) | 13 (12–14) | 13 (12–14) |  |
Age at Menopause | N | 485 | 420 | P = 0.38# |
|  | Median (IQR) | 50 (46–52) | 50 (47–52) |  |
Number of children | N | 849 | 712 | P < 0.01# |
|  | Median (IQR) | 2 (1–3) | 2 (2–3) |  |
Age at first pregnancy | N | 705 | 646 | P < 0.01# |
|  | Median (IQR) | 24 (21–27) | 23 (20–26) |  |
Family history of breast cancer | N | 850 | 712 | P < 0.01~ |
| Â | Yes | 234 (27.5%) | 153 (21.5%) | Â |
| Â | No | 616 (72.5%) | 559 (78.5%) | Â |