Baseline demographic characteristics
| Control (n=76) | Intervention (n=91) | |
| Age, M (SD) | 18.0 (1.3) | 17.7 (1.2) |
| Ethnicity, n (%) | ||
| Pasifika | 34 (44.7) | 46 (50.6) |
| Anglo-European | 36 (47.4) | 34 (37.4) |
| Other | 5 (6.6) | 10 (11.0) |
| Missing | 1 (1.3) | 1 (1.1) |
| Sexuality, n (%) | ||
| Heterosexual | 72 (94.7) | 81 (89) |
| Gay | 1 (1.3) | NA |
| Bisexual | NA | 1 (1.1) |
| Not listed | 1 (1.3) | 2 (2.2) |
| Missing | 2 (2.6) | 7 (7.7) |