Table 1. Frequency distribution of select characteristics in cervical cases and controls.
| Variablesa | Test set | P | Validation set | P | ||
|---|---|---|---|---|---|---|
| Cases | Controls | Cases | Controls | |||
| n = 571 (%) | n = 657 (%) | n = 608 (%) | n =1165 (%) | |||
| Age, year (mean ± SD) | 47.5 ± 10.1 | 47.3 ± 10.6 | 0.726 | 51.5±9.4 | 51.6±10.7 | 0.971 |
| Parity | ||||||
| 0-1 | 324 (58.3) | 446 (75.2) | < 0.001 | 323(54.2) | 800(72.6) | <0.001 |
| ≥ 2 | 232 (41.7) | 147 (24.8) | 273(45.8) | 302(27.4) | ||
| Abortion | ||||||
| No | 377 (70.5) | 402 (72.0) | 0.565 | 242(40.7) | 454(41.5) | 0.762 |
| Yes | 158 (29.5) | 156 (28.0) | 352(59.3) | 640(58.5) | ||
| Menopausal status | ||||||
| Premenopausal | 240 (44.0) | 127 (21.1) | < 0.001 | 318(52.65) | 436(39.7) | <0.001 |
| Postmenopausal | 306 (56.0) | 476 (78.9) | 286(47.35) | 661(60.3) | ||
| Histologic types | ||||||
| Squamous cell carcinoma | 538 (94.2) | 550(90.5) | ||||
| Adenocarcinomas | 24 (4.2) | 31(5.1) | ||||
| Adenosquamous carcinoma | 4 (0.7) | 16(2.6) | ||||
| Othersb | 5 (0.9) | 11(1.8) | ||||
| Stage | ||||||
| I | 383 (68.0) | 391(64.3) | ||||
| II | 145 (25.8) | 209(34.4) | ||||
| III | 28 (5.0) | 2(0.3) | ||||
| IV | 7 (1.2) | 6(1.0) | ||||
a Some cases lack information of selected variables.
b Other histological types, such as cervical choriocarcinoma.