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Table 4 Results from multiple logistic regression that evaluated demographic/family factors and emotional/behavioural problems in relation to the presence of smoking habits

From: Emotional, behavioural problems and cigarette smoking in adolescence: findings of a Greek cross-sectional study

Explanatory variables OR(95% CI)
Age (years)  
12-15 1.00‡
16-18 8.56(4.89-14.97)
Gender  
girl 1.00
boy 0.90(0.52-1.54)
Family socioeconomic status  
low 0-3 1.00
medium 4-5 0.43(0.26-0.71)
high 6-7 0.46(0.23-0.94)
Mother smoker  
No 1.00
Yes 2.56(1.49-4.39)
Father smoker  
No 1.00
Yes 1.94(1.11-3.4)
Exposure to family members' smoking  
No 1.00
Yes 1.11(0.65-1.88)
Leisure time (for one unit increase) 1.01(0.99-1.02)
SDQ total difficulties (for one unit increase) 1.13(1.08-1.18)
  1. Abbreviations: OR = Odds Ratio, CI = 95% Confidence Interval, SDQ = Strengths and Difficulties
  2. Questionnaire ‡ indicates reference category