| Socio-economic data of parents | Effective | Percentage |
| Age of patients |
|
|
| 1 - 5 months | 222 | 64.9 |
| 6 - 11 months | 79 | 23.1 |
| 12 - 17 months | 24 | 7 |
| 18 - 23 months | 17 | 5 |
| Gender |
|
|
| Male | 189 | 55.3 |
| Female | 153 | 44.7 |
| Fathers’ education level |
|
|
| Not in school | 108 | 31.6 |
| Primary | 70 | 20.5 |
| Secondary | 87 | 25.4 |
| Higher | 77 | 22.5 |
| Profession of fathers |
|
|
| Civil servant | 56 | 16.4 |
| Tradesman | 97 | 28.4 |
| Worker | 117 | 34.2 |
| Craftsman | 72 | 21 |
| Educational level of mothers |
|
|
| Not in school | 133 | 39 |
| Primary | 74 | 21.6 |
| Secondary | 95 | 27.8 |
| Higher | 40 | 11.7 |
| Mothers’ occupation |
|
|
| Housewife | 240 | 70.2 |
| Civil servant | 18 | 5.2 |
| Craftswoman | 50 | 14.6 |
| Tradeswoman | 30 | 8.8 |
| Other | 4 | 1.2 |
| Parents’ economic conditions |
|
|
| Favourable | 50 | 14.6 |
| Acceptable | 95 | 27.8 |
| Unfavourable | 197 | 57.6 |