Table 4 Relative risk ratios (RRR) and 95% confidence intervals (CI) with low-risk behavior class as the baseline outcome group
| Â | Moderate-risk | High-risk | ||
|---|---|---|---|---|
RRR | 95% CI | RRR | 95% CI | |
Male gender | 2.09 | (1.91–2.28) | 10.3 | (6.02–17.8) |
Age, years (Ref: 12) | ||||
 13 | 1.24 | (1.02–1.50) | 1.54 | (0.53–4.45) |
 14 | 2.31 | (1.89–2.83) | 2.52 | (0.86–7.41) |
 15 | 2.93 | (2.42–3.54) | 4.62 | (1.67–12.8) |
Religion (Ref: Buddhist) | ||||
 Muslim/Christian | 0.68 | (0.57–0.82) | 2.96 | (1.88–4.67) |
GPA (Ref: 3.1–4.0) | ||||
 2.1–3.0 | 1.45 | (1.31–1.60) | 1.27 | (0.81–2.00) |
  ≤ 2.0 | 1.97 | (1.72–2.25) | 3.08 | (1.89–5.01) |
Lives with parents | 0.85 | (0.77–0.94) | 0.85 | (0.57–1.28) |
Private school (vs public) | 1.44 | (1.31–1.59) | 1.57 | (1.11–2.23) |
Alcohol use by family members | 1.32 | (1.19–1.46) | 0.70 | (0.44–1.11) |
Tobacco use by family members | 1.28 | (1.15–1.43) | 1.67 | (1.06–2.64) |
Drug use by family members | 1.98 | (1.58–2.48) | 8.94 | (5.23–15.3) |
Alcohol use by peers | 1.60 | (1.45–1.76) | 1.52 | (1.01–2.29) |
Tobacco use by peers | 1.74 | (1.55–1.96) | 1.52 | (0.81–2.84) |
Drug use by peers | 1.30 | (1.18–1.43) | 3.45 | (2.25–5.29) |
Disdain from friends if use drugs (low vs. high level) | 2.17 | (1.98–2.37) | 5.26 | (3.14–8.81) |
Perceived roughnessaof school (high vs. low level) | 1.21 | (1.11–1.32) | 2.02 | (1.44–2.83) |