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Table 2 Prevalence rates stratified by school attendance status and odds ratios for substance abuse and selected covariates (N = 1535)

From: A prospective study of methamphetamine use as a predictor of high school non-attendance in Cape Town, South Africa

  Prevalence Odds ratio
(95% CI)
p-value
Simple models, adjusted for design only1
  Not in school
% (95% CI)
In-school
% (95% CI)
 
Life-time meth. use
(Reference category (Ref)): Never used meth)
12.4 (8.5 - 17.7) 6.1 (4.1 - 9.0) 2.19 (1.39 - 3.46)
p < 0.01
Life-time cannabis use
(Reference category (Ref)): Never used cannabis)
30.7 (23.3 - 39.3) 20.3 (17.6 - 23.2) 1.75 (1.22 - 2.49)
p < 0.01
Current alcohol use
(Ref: Not using alcohol currently)
7.7 (4.9 - 12.0) 6.4 (4.6 - 8.8) 1.22 (0.7 - 2.12)
p > 0.05
Current smoking
(Ref. Not smoking currently)
34.2 (26.0 - 43.4) 18.8 (14.9 - 23.4) 2.25 (1.45 - 3.48)
p <0.01
Ever repeated a year at school
(Ref. Never repeated a year)
37.7 (30.7 - 45.3) 22.7 (16.7 - 30.0) 2.07 (1.42 - 3.02)
p < 0.01
Age > than norm for grade
(Ref. Age normal)
32.2 (22.3 - 44.1) 15.7 (9.2 - 25.6) 2.55 (1.85 - 3.52)
p < 0.01
  1. 1 Logistic regression adjusted for survey design (p-values were from Wald t-tests, df = 14)
  2. adjusted for selected variables and study design (N = 1265)