From: Association of p21 SNPs and risk of cervical cancer among Chinese women
 | Patients (n=393) | Controls (n=434) | Pa |
---|---|---|---|
 | No. (%) | No. (%) |  |
Age | Â | Â | Â |
 ≤35 | 82 (20.9) | 105 (24.4) | 0.377 |
 36-50 | 219 (55.7) | 241 (55.5) |  |
 >50 | 92 (23.4) | 88 (20.3) |  |
Smoking | Â | Â | Â |
 Never | 371 (94.4) | 419 (96.5) | 0.177 |
 Ever | 22 (5.6) | 15 (3.5) |  |
HPV status | Â | Â | Â |
HPV+ | 351 (89.3) | 0 (0) | Â |
HPV- | 42 (10.7) | 434 (100) | Â |
Clinical stageb | Â | Â | Â |
 Stage 0 | 213 (54.2) |  |  |
 Stage I | 138 (35.1) |  |  |
 Stage II | 34 (8.7) |  |  |
 Stage III | 7 (1.8) |  |  |
 Stage IV | 1 (0.3) |  |  |