Table I.
Demographic characteristics of study population
| Overall | Male | Female | P | |
|---|---|---|---|---|
| N (%) | 6414 (100.0) | 3174 (49.5) | 3240 (50.5) | |
| Age (y) | ||||
| 6-9 | 1772 (27.6) | 899 (28.3) | 873 (26.9) | |
| 10-14 | 2519 (39.3) | 1257 (39.6) | 1262 (39.0) | |
| 15-19 | 2123 (33.1) | 1018 (32.1) | 1105 (34.1) | .19 |
| Ethnicity, n (%) | ||||
| Malay | 4317 (67.3) | 2131 (67.1) | 2186 (67.5) | |
| Indian | 632 (9.9) | 322 (10.1) | 310 (9.6) | |
| Chinese | 1272 (19.8) | 625 (19.7) | 647 (20.0) | |
| Bumiputera/Orang Asli | 116 (1.8) | 61 (1.9) | 55 (1.7) | |
| Other | 77 (1.2) | 35 (1.1) | 42 (1.3) | .81 |
Differences in distributions across categories between male and female subjects were compared using the Pearson χ2 test.