| Socio-demographic characteristics | Numbers | Frequency (%) |
| Age (years) | ||
| - <40 years | 8 | 4.5 |
| - 40 - 50 | 59 | 33.1 |
| - 50 - 60 | 63 | 35.4 |
| - >60 | 48 | 27 |
| Total | 178 | 100 |
| Level of education | ||
| - Not educated | 15 | 8.4 |
| - Primary | 31 | 17.4 |
| - Secondary | 61 | 34.3 |
| - Superior | 71 | 39.9 |
| - Total | 178 | 100 |
| Socio-economic level | ||
| - Low | 13 | 7.3 |
| - medium | 144 | 80.9 |
| - High | 21 | 11.8 |
| - Total | 178 | 100 |