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Table 4 Relative risk ratios (RRR) and 95% confidence intervals (CI) with low-risk behavior class as the baseline outcome group

From: Clusters of alcohol and drug use and other health-risk behaviors among Thai secondary school students: a latent class analysis

  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)
  1. GPA grade point average
  2. aIncludes seven items: physical assault, drug use, suicide, rape or sexual assault, heavy drinking, group fighting and interpersonal quarrelling
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