| Variables | Cases n (%) | Controls n (%) | Total n (%) | P |
| Age (Years) | ||||
| Median and SIR | 42 (29-55) | 45 (37-53) | 281 (100) | 0.34 |
| Gender | 0.91 | |||
| F | 43 (61.4) | 128 (60.7) | 171 (60.9) | |
| M | 27 (38.6) | 83 (39.3) | 110 (39.1) | |
| Marital status | 0.08 | |||
| Married | 20 (28.6) | 90 (42.7) | 110 (39.1) | |
| Single | 35 (50) | 88 (41.7) | 123 (43.8) | |
| Divorced | 13 (18.6) | 22 (10.4) | 35 (12.5) | |
| Common-law | 2 (2.9) | 11 (5.2) | 13 (4.6) | |
| Level of education | 0.94 | |||
| Without education | 5 (7.1) | 19 (9) | 24 (8.5) | |
| Primary | 6 (8.6) | 16 (7.6) | 22 (7.8) | |
| Secondary | 39 (55.7) | 112 (53.1) | 151 (53.7) | |
| University | 20 (28.6) | 64 (30.3) | 84 (29.9) | |
| Remuneration | 0.1 | |||
| No | 29 (41.4) | 65 (30.8) | 94 (33.5) | |
| Yes | 41 (58.6) | 146 (69.2) | 187 (66.5) | |
| Patient’s place of residence | 0.552 | |||
| Out of Zone | 65 (92.9) | 191 (90.5) | 256 (91.1) | |
| Zone | 5 (7.1) | 20 (9.5) | 25 (8.9) | |