Table 2.
Comparison of categorical variables by case-control status (787 cases and 928 controls) in Fars province, Iran, 2009
| Characteristic | Cases (n = 787) |
Controls (n = 928) | P-value* | |||
|---|---|---|---|---|---|---|
| n | % | n | % | |||
| Education level | Illiterate | 171 | 21.7 | 371 | 40.0 | 0.001 |
| Primary | 284 | 36.1 | 303 | 32.6 | ||
| High-school | 239 | 30.4 | 217 | 23.4 | ||
| Academic | 93 | 11.8 | 37 | 4.0 | ||
| Occupation status | Housewife | 635 | 80.7 | 873 | 94.1 | 0.001 |
| Employed | 152 | 19.3 | 55 | 5.9 | ||
| Marital status | Married | 665 | 84.5 | 777 | 83.7 | 0.440 |
| Divorced | 11 | 1.4 | 8 | 0.90 | ||
| Widow | 111 | 14.1 | 143 | 15.4 | ||
| Menopause status | Pre-Menopausal | 330 | 41.9 | 476 | 51.3 | 0.001 |
| Post- Menopausal | 457 | 58.1 | 452 | 48.7 | ||
| Age at first pregnancy (year) | < 25 | 613 | 77.9 | 831 | 89.55 | 0.001 |
| ≥25 | 174 | 22.1 | 97 | 10.45 | ||
| Age at first marriage (year) | < 20 | 478 | 60.7 | 713 | 76.8 | 0.001 |
| ≥20 | 309 | 39.3 | 215 | 23.2 | ||
| Breastfeeding duration (month) | ≤60 | 475 | 60.4 | 385 | 41.5 | 0.001 |
| > 60 | 312 | 39.6 | 643 | 58.5 | ||
| OC use | Never | 280 | 35.6 | 397 | 42.8 | 0.002 |
| Ever | 507 | 64.4 | 531 | 57.2 | ||
| Parity | ≤3 | 354 | 45.0 | 317 | 34.2 | 0.001 |
| > 3 | 433 | 55.0 | 611 | 65.8 | ||
*Obtained from chi-square test