Table 1.
Characteristics of the study population
| Characteristics | Cases n (%) | Controls n (%) | P-valuea |
|---|---|---|---|
| Whole sample | 384 | 361 | |
| Gender | |||
| Male | 263 (68.49) | 243 (67.31) | 0.731 |
| Female | 121 (31.51) | 118 (32.69) | |
| Age mean (years) | 42.24 | 43.58 | |
| Age | |||
| ≤30 | 101 (26.30) | 83 (22.99) | 0.295 |
| >30 | 283 (73.70) | 278 (77.01) | |
| Country | |||
| Tunisia | 190 (49.48) | 172 (47.65) | 0.852 |
| Morocco | 180 (46.88) | 174 (48.20) | |
| Algeria | 14 (3.65) | 15 (4.16) | |
| TNM stageb | |||
| I | 0 | - | |
| II | 13 (4.55) | - | |
| III | 65 (22.73) | - | |
| IV | 208 (72.73) | - | |
a P-value of χ2 comparing cases and controls
bTNM was missing for 98 cases out of 384