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Table 4 Self-enforcement and associated factors

From: Compliance and enforcement of a partial smoking ban in Lisbon taxis: an exploratory cross-sectional study

Self-enforcement   Yes   No   Total   Crude OR 95%CI p value Adjusted OR 95%CI p value MLR
   n % n % n %        
Smoking behaviour N-Smokers 131 92.9 10 7.1 141 100 5.44 2.54–11.69 <0.001 3.94 1.77–8.75 0.001 Model explanation
Ref Smokers 77 70.6 32 29.4 109 100        82.9%
  Total 208 83.2. 42 16.8 250 100        
Smoking Drivers’ Compliance Yes 35 94.6 2 5.4 37 100 12.50 2.79–56.02 <0.001 ns    Hosmer &Lemeshow test
Ref No 42 58.3 30 41.7 72 100        P value = 0.264
  Total 77 70.6 32 29.4 109 100        
Smoke-free Car * Yes 111 92.5. 9 7.5 120 100 4.54 2.03–10.17 <0.001 ns    Model p value
Ref No 76 73.1 28 26.9 104 100        <0.001
  Total 187 83.5 37 16.5 224 100        
Allowing smoking prior to the ban** No 48 96.0 2 4.00 50 100 6.41 1.49–27.69 0.005 4.79 1.08–21.16 0.039  
Ref Yes 131 78.9 35 21.1 166 100        
  Total 179 82.9 37 17.1 216 100        
Age ≥55 104 88.9 13 11.1 117 100 2.23 1.10–4.53 0.024 ns    
Ref <55 104 78.2 29 21.8 133 100        
  Total 208 83.2 42 16.8 250 100        
Ban support Yes 179 86.5 28 13.5 207 100 3.09 1.46–6.55 0.002 ns    
Ref No 29 67.4 14 32.6 43 100        
  Total 208 83.2 42 16.8 250 100        
  1. OR Odds ratio, MLR Multiple logistic regression, Ref Reference category for comparison; ns: non-significant; *not-applicable: “I do not have a car” (n = 26); **not-applicable: “I did not work as a taxi driver prior the ban” (n = 34); Adjusted OR derives from MLR adjusted for drivers’ smoking behaviour, allowing smoking prior to the ban, smoke-free car, age, ban support.