| Variables | Cases No. (%) | Controls No. (%) | Total No. (%) | P-value* |
| Educational level | ||||
| Can read & write | 26 (52) | 10 (20) | 36 (36) | 0.001 |
| Secondary | 16 (32) | 9 (18) | 25 (25) | |
| University & higher | 8 (16) | 31 (62) | 39 (39) | |
| Total | 50 (100) | 50 (100) | 100 (100) | |
| Occupation | ||||
| Working | 13 (26) | 34 (68) | 47 (47) | 0.001 |
| Not working | 37 (74) | 16 (32) | 53 (53) | |
| Total | 50 (100) | 50 (100) | 100 (100) | |
| Type of residency | ||||
| Apartment | 22 (44) | 27 (54) | 49 (49) | 0.31 |
| House | 28 (56) | 23 (46) | 51 (51) | |
| Total | 50 (100) | 50 (100) | 100 (100) | |
| Satisfaction with financial income | ||||
| Satisfied | 16 (32) | 36 (72) | 52 (52) | 0.001 |
| Unsatisfied | 34 (68) | 14 (28) | 48 (48) | |
| Total | 50 (100) | 50 (100) | 100 (100) | |
| Smoking | ||||
| Smoker | 23 (46) | 7 (14) | 30 (30) | 0.001 |
| Non-smoker | 27 (54) | 43 (86) | 70 (70) | |
| Total | 50 (100) | 50 (100) | 100 (100) | |