Sociodemographic breakdown of sample (n=940)
| Mean age in years | n | % |
| 15.9 (SD=1.46) | ||
| Females | 443 | 47.1% |
| Males | 497 | 52.9% |
| Nationality | ||
| Singaporean citizen | 805 | 85.6% |
| Permanent resident | 135 | 14.4% |
| Ethnicity | ||
| Chinese | 773 | 82.2% |
| Malay | 41 | 4.4% |
| Indian | 75 | 8.0% |
| Other | 51 | 5.4% |