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Table 5 Changes in driving frequency and in use of driving-impairing medicines: multiple logistic regression analysis

From: Predictors for patient knowledge and reported behaviour regarding driving under the influence of medicines: a multi-country survey

Independent variables Change in driving frequency (n = 305) Change in the use of driving-impairing medicines (n = 296)
  Odds-ratio 95% CI for OR Odds-ratio 95% CI for OR
   lower upper   lower upper
Country (Germany used as reference)
   Belgium 2.00 0.53 6.41 0.79 0.29 2.19
   The Netherlands 0.69 0.21 2.26 0.24* 0.08 0.69
   Spain 0.63 0.23 1.72 0.46 0.20 1.07
Gender (0 = male; 1 = female) 1.70 0.97 3.00 1.18 0.77 1.80
Age categories (category 55-64 used as reference)
   18-25 4.87 0.93 25.49 0.81 0.18 3.52
   26-34 4.17* 1.14 15.25 1.78 0.59 5.42
   35-44 2.08 0.71 6.15 1.72 0.68 4.31
   45-54 2.75 0.97 7.84 1.79 0.71 4.54
   65-75 1.62 0.48 5.84 0.60 0.19 1.95
Educational level (Intermediate vocational training used as reference)
   Not completed primary school 1.14 0.17 7.65 0.76 0.14 4.15
   Completed primary school 2.78 0.95 8.11 2.13 0.81 5.61
   Lower vocational training 2.20 0.82 5.90 0.79 0.33 1.88
   University 1.46 0.57 3.71 0.98 0.43 2.20
Use of motorised vehicles
   (0 = sporadic users; 1 = frequent users) 0.35* 0.18 0.69 0.58 0.31 1.10
Experienced side effects
   (0 = no side effects; 1 = side effects) 3.18* 1.40 7.21 3.39* 1.68 6.82
Medicines (Tranquilisers used as reference)
   Sedatives 0.77 0.36 1.62 1.07 0.55 2.08
   Antidepressants 0.84 0.42 1.68 0.24* 0.12 0.50
   Anti-allergics 0.24* 0.10 0.58 0.82 0.40 1.66
Knowledge about the risk of having a road accident (0 = totally disagree; 5 = totally agree) 0.932 0.65 1.33 1.49* 1.09 2.03
Attitude
   Use of medicines and driving (0 = totally disagree; 5 = totally agree) 0.88 0.64 1.20 1.08 0.82 1.43
   Driving under the influence of driving-impairing medicines (0 = totally disagree; 5 = totally agree) 2.23* 1.43 3.50 1.29 0.91 1.85
Adjusted R 2   0.348    0.273  
p-value (model) < 0.001* < 0.001*