| Variables | Characteristics | Number of children | Percentage (%) |
| Sex | M | 45 | 51.1 |
| F | 43 | 48.9 | |
| Total | 88 | 100.0 | |
| Age at echocardiographic diagnosis (in months) | <1 | 2 | 2.2 |
| 1 - 12 | 39 | 44.3 | |
| 13 - 59 | 26 | 29.6 | |
| 60 - 120 | 14 | 15.9 | |
| >120 | 7 | 8.0 | |
| Total | 88 | 100.0 | |
| Level of schooling | Preschool | 39 | 44.3 |
| Primary | 3 | 3.4 | |
| Secondary | 1 | 1.1 | |
| No schooling | 2 | 2.3 | |
| Not specified | 43 | 48.9 | |
| Total | 88 | 100.0 | |
| Residence | Urban | 57 | 64.7 |
| Rural | 11 | 12.5 | |
| Semi-urban | 10 | 11.4 | |
| Not specified | 10 | 11.4 | |
| Total | 88 | 100.0 | |
| Socio-economic level | Low | 48 | 54.5 |
| Middle | 27 | 30.7 | |
| High | 3 | 3.4 | |
| Unspecified | 10 | 11.4 | |
| Total | 88 | 100.0 |