Table 1.
Demographic and selected variables between cervical cancer cases and controls
| Variables | Cases (N = 1486) | Controls (N = 1536) | P |
|---|---|---|---|
| Age, year | |||
| ≤50 | 657 (44.21) | 641 (41.73) | 0.168 |
| >50 | 829 (55.79) | 895 (58.27) | |
| Age at menarche, year | |||
| ≤16 | 1069 (71.94) | 921 (59.96) | <0.001 |
| >16 | 417 (28.06) | 615 (40.04) | |
| Menopausal status | |||
| Premenopausal | 608 (41.70) | 598 (38.93) | 0.015 |
| Natural menopause | 769 (52.74) | 878 (57.16) | |
| Unnatural menopause | 81 (5.56) | 60 (3.91) | |
| Parity | |||
| 0–1 | 620 (42.29) | 731 (48.31) | 0.001 |
| 2 | 406 (27.69) | 405 (26.77) | |
| >2 | 440 (30.01) | 377 (24.92) | |
| Smoking status | |||
| Never | 1404 (95.77) | 1514 (98.57) | <0.001 |
| Ever | 62 (4.23) | 22 (1.43) | |
| Family history of any cancer | |||
| No | 1187 (81.02) | 1223 (79.62) | 0.335 |
| Yes | 278 (18.98) | 313 (20.38) | |
| Histological types | |||
| Squamous cell carcinoma | 1380 (92.87) | ||
| Adenocarcinomas | 77 (5.18) | ||
| Adenosquamous carcinoma | 26 (1.75) | ||
| Others | 3 (0.20) | ||
| Stage | |||
| CIN3 | 10 (0.67) | ||
| I | 366 (24.63) | ||
| II | 769 (51.75) | ||
| III | 187 (12.58) | ||
| IV | 45 (3.03) | ||
| Unclassified | 109 (7.34) | ||
The boldface values represent these P values were <0.05.