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Table 2 Socio-demographic characteristics of substance users and non-users among Korean adolescents

From: Prevalence, correlates, and associated psychological problems of substance use in Korean adolescents

  Substance users (n = 311), % Non-users (n = 71,749), % OR (95 % CI) p-value
Age (years), mean (95 % CI) 15.90 (15.70–16.10) 15.00 (14.96–15.04) 1.37 (1.27–1.48) <0.001
Sex, male, % 65.1 52.1 1.71 (1.33–2.21) <0.001
Area of residence, %     
 Rural 8.2 6.5 ref  
 Small city 46.0 49.9 0.83 (0.53–1.32) 0.441
 Large city 45.8 43.6 0.73 (0.46–1.16) 0.184
Paternal Education, %     
 Middle school education or lower 11.0 3.4 ref  
 High school education 32.4 36.5 0.28 (0.17–0.46) <0.001
 College degree or higher 56.6 60.0 0.3 (0.19–0.47) <0.001
Maternal Education, %     
 Middle school education or lower 12.8 3.0 ref  
 High school education 35.1 46.9 0.17 (0.1–0.29) <0.001
 College degree or higher 52.1 50.2 0.24 (0.15–0.39) <0.001
Residential type, %     
 With family 59.5 96.1 ref  
 With relatives 9.0 0.8 18.03 (12.38–26.25) <0.001
 With friends, alone, domitory 11.2 2.7 6.7 (4.61–9.73) <0.001
 Facility 20.3 0.4 88.78 (63.81–123.54) <0.001
Socio-economic status, %     
 Low 25.0 3.7 ref  
 Low-Middle 16.4 14.2 0.17 (0.12–0.24) <0.001
 Middle 19.9 48.4 0.06 (0.04–0.09) <0.001
 High-Middle 16.4 25.7 0.1 (0.06–0.15) <0.001
 High 22.3 7.9 0.42 (0.31–0.57) <0.001
Academic achievement, %     
 Low 29.9 10.8 ref  
 Low-Middle 18.9 24.1 0.29 (0.2–0.4) <0.001
 Middle 18.4 28.0 0.24 (0.17–0.33) <0.001
 High-Middle 10.2 24.9 0.15 (0.1–0.23) <0.001
 High 22.6 12.2 0.67 (0.5–0.9) 0.008
Alcohol use 85.1 42.8 7.64 (5.5–10.62) <0.001
Tobacco use 78.6 19.7 15.01 (11.41–19.75) <0.001
  1. OR odd ratios, CI confidence intervals