Demographic and socioeconomic characteristics of the survey respondents
| 6–7 year age group: n (%) | 12–15 year age group: n (%) | |||||
|---|---|---|---|---|---|---|
| 1994 | 2001 | p value* | 1994 | 2001 | p value* | |
| *“Not stated” was excluded form the χ2 comparison. | ||||||
| Total subjects surveyed | 2030 | 5305 | – | 4208 | 4058 | – |
| Total schools sampled | 10 | 21 | – | 12 | 15 | – |
| Sex | ||||||
| Female | 45.7 | 47.7 | 43.5 | 57.8 | ||
| Male | 51.6 | 50.7 | 0.257 | 53.8 | 41.4 | <0.001 |
| Not stated | 2.7 | 1.6 | 2.7 | 0.8 | ||
| Race | ||||||
| Chinese | 83.5 | 69.9 | 76.0 | 75.0 | ||
| Malay | 8.7 | 19.1 | 14.1 | 12.3 | ||
| Indian | 3.1 | 7.8 | <0.001 | 5.0 | 8.2 | <0.001 |
| Other/not stated | 4.7 | 3.2 | 4.9 | 4.5 | ||
| Type of housing | ||||||
| Public housing | 59.5 | 86.0 | 80.9 | 68.8 | ||
| Private condominium | 13.5 | 8.1 | 7.6 | 15.3 | ||
| Landed property | 21.2 | 3.6 | <0.001 | 9.0 | 14.2 | <0.001 |
| Not stated | 5.8 | 2.3 | 2.5 | 1.7 | ||