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Table 4 Adjusted ORs and Confidence intervals for substance use overestimation

From: Peer substance use overestimation among French university students: a cross-sectional survey

Variable Adjusted OR (95% confidence interval)
  Tobacco Cannabis Alcohol HED
Tobacco use (reference: no use)     
   Low: < 1/day in the last month 0.68 (0.40 - 1.17) - NS 0.64 (0.41 - 0.99)
   High: ≥ 1/day in the last month 0.52 (0.30 - 0.89)    0.47 (0.28 - 0.77)
Cannabis use (reference: no use)     
   Low: ≤ 1/week in the last 12 months - 1.66 (1.11 - 2.51) - -
   High: > 1/week in the last 12 months   2.37 (1.23 - 4.73)   
Alcohol use (reference: no use)     
   Low: < 10 days in the last month - NS 1.95 (1.31 - 2.92) -
   High: ≥ 10 days in the last month    2.17 (1.10 - 4.23)  
HED (reference: no use)     
   Low: < 4 times in the last month - - - 1.85 (1.19 - 2.89)
   High: ≥ 4 times in the last month     2.64 (1.35 - 5.29)
Discipline (reference: sociology)     
   Foreign language - 0.78 (0.32 - 1.93) 0.44 (0.13 - 1.43) 0.75 (0.21 - 2.68)
   Medicine   0.34 (0.18 - 0.64) 3.72 (2.28 - 6.11) 3.46 (2.12 - 5.70)
   Nursing studies   0.35 (0.18 - 0.70) 1.16 (0.72 - 1.85) 1.01 (0.66 - 1.54)
Tobacco use prevalence in class 0.92 (0.89 - 0.94) - - -
Cannabis use prevalence in class - 0.92 (0.88 - 0.96) - -
Alcohol use prevalence in class - NS 0.96 (0.93 - 0.99) 1.04 (1.01 - 1.07)
HED prevalence in class - - 0.93 (0.87 - 0.99) 0.85 (0.79 - 0.91)
Gender (reference: male) 2.51 (1.56 - 4.02) NS - 1.75 (1.17 - 2.64)
Previous questionnaires (reference: no) - - 1.56 (1.10 - 2.21) NS
Cannabis prevention campaigns 1.15 (1.02 - 1.34) 1.11 (1.02 - 1.22) - -
  1. A "-" sign indicates that the variable was not included in this model. NS: the variable was included in the model but failed to reach significance at the 5% level. HED: Heavy episodic drinking.