Distribution of parental education or religion stratified by Pethidine® and no Pethidine® groups
| Total group (n=297) | % Pethidine® (n=133) | % No Pethidine® (n=164) | |
| Religion | |||
| Christian | 41.4 | 39.8 | 42.7 |
| Other | 4.4 | 6.8 | 2.4 |
| No | 54.2 | 53.4 | 54.9 |
| Education | |||
| Low | 38.4 | 32.3 | 43.3 |
| Intermediate | 27.9 | 32.3 | 24.4 |
| High | 33.7 | 35.3 | 32.3 |
| Sex | |||
| Male | 39.4 | 42.1 | 37.2 |
| Female | 60.6 | 57.9 | 62.8 |
Low. elementary school and vocational education; intermediate, high school; high, university.