Characteristics of cases and controls
| Variables | Cases (%) | Controls (%) |
|---|---|---|
| *p Values = 0.04, all other variables had a p value >0.05. | ||
| Mean (SD) age of parent (years) | ||
| Father | 31.2 (6.5)* | 30.1 (5.3)* |
| Mother | 27.8 (5.9)* | 26.7 (5.1)* |
| Father's education | ||
| Primary | 71 | 64.3 |
| Secondary | 17 | 25.7 |
| More than secondary | 12 | 10.0 |
| Mother's education | ||
| Primary | 74 | 71.5 |
| Secondary | 23 | 20.1 |
| More than secondary | 3 | 8.4 |
| Father's occupation | ||
| Agriculture | 45 | 46.5 |
| Labour: daily or permanently employed | 36 | 40.5 |
| Private business | 10 | 5.2 |
| Others | 9 | 7.7 |
| Mother's occupation | ||
| Agriculture | 50 | 49.1 |
| Labour: daily or permanently employed | 19 | 25.2 |
| Housewife | 22 | 17.7 |
| Private business | 8 | 6.2 |
| Others | 1 | 1.7 |
| Parents' marital status | ||
| Living together | 87 | 87.9 |
| Living apart | 13 | 12.1 |
| Child's primary caregiver | ||
| Parents | 83 | 79.5 |
| Grandparents or relatives | 17 | 20.5 |
| Daytime caregiver | ||
| Parents | 52 | 58.0 |
| Grandparents | 34 | 31.6 |
| Other relatives | 7 | 5.2 |
| Nurseries | 7 | 5.2 |
| Night-time caregiver | ||
| Parents | 78 | 76.5 |
| Grandparents or other relatives | 22 | 23.5 |