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Table 3 Socio-demographic characteristics of tobacco users and non-users among Korean adolescents

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

  Tobacco users (n = 13,967), % Non-users (n = 58,094), % OR (95 % CI) p-value
Age (years), mean (95 % CI) 15.70 (1.54) 14.83 (1.75) 1.35 (1.34–1.35) <0.001
Sex, male, % 74.4 46.6 3.33 (3.31–3.25) <0.001
Area of residence, %     
 Rural 7.4 6.3 ref  
 Small city 50.3 49.8 0.86 (0.86–0.87) <0.001
 Large city 42.4 43.9 0.83 (0.82–0.84) <0.001
Paternal Education, %     
 Middle school education or lower 5.5 3.0 ref  
 High school education 43.3 34.8 0.67 (0.66–0.68) <0.001
 College degree or higher 51.2 62.2 0.45 (0.44–0.45) <0.001
Maternal Education, %     
 Middle school education or lower 4.5 2.6 ref  
 High school education 53.4 45.2 0.69 (0.68–0.70) <0.001
 College degree or higher 42.1 52.1 0.47 (0.46–0.48) <0.001
Residential type, %     
 With family 94.2 96.4 ref  
 With relatives 1.6 0.7 2.37 (2.31–2.43) <0.001
 With friends, alone, domitory 3.2 2.6 1.24 (1.22–1.26) <0.001
 Facility 1.0 0.3 3.32 (3.22–3.43) <0.001
Socio–economic status, %     
 Low 7.1 3.0 ref  
 Low-Middle 18.8 13.1 0.62 (0.61–0.62) <0.001
 Middle 46.1 48.8 0.41 (0.40–0.41) <0.001
 High-Middle 21.0 26.8 0.34 (0.33–0.34) <0.001
 High 7.0 8.2 0.37 (0.37–0.38) <0.001
Academic achievement, %     
 Low 20.1 8.7 ref  
 Low-Middle 28.8 22.9 0.54 (0.54–0.55) <0.001
 Middle 24.7 28.8 0.37 (0.36–0.37) <0.001
 High-Middle 18.0 26,5 0.29 (0.29–0.30) <0.001
 High 8.4 13.2 0.27 (0.27–0.28) <0.001
Alcohol use 82.1 33.2 9.22 (9.16–9.28) <0.001
  1. OR odd ratios, CI confidence intervals