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Table 3 Characteristics of the respondents, per country

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

  Country p-value*
  Belgium Germany Netherlands Spain  
Total number of participants 136 146 136 215  
  n %a n %a n %a n %a  
Gender          
   Male 135 34.6 145 34.2 136 41.2 214 47.0 0.175
   Female   64.7   65.1   58.8   52.6  
Age Category          
   18-25   5.9   1.4   3.7   6.5  
   26-34 134 11.8 145 10.3 136 5.9 213 20.5 < 0.001*
   35-44   18.4   24.7   26.5   27.0  
   45-54   32.4   21.2   23.5   22.8  
   55-64   15.4   19.2   27.2   14.0  
   65-75   14.7   22.6   13.2   8.4  
Educational level          
   Not completed primary education   11.0   0.7   1.5   5.1  
   Completed primary education   14.7   32.2   5.9   19.1  
   Lower vocational training 132 22.8 145 32.2 128 19.1 215 16.7 < 0.001*
   Intermediate vocational training   25.7   17.8   41.9   19.5  
   University   22.8   16.4   25.7   39.5  
Use of motorised vehicles          
   Sporadic users 136 33.1 146 34.9 136 47.8 215 31.2 0.012*
   Frequent users   66.9   65.1   52.2   68.8  
Use of driving-impairing medicines          
   Use of 1 medicine   65.2   70.8   71.2   75.0  
   Use of 2 medicines   28.1   25.0   23.5   21.2  
   Use of 3 medicines 135 5.9 144 4.2 132 4.5 212 2.8 0.734
   Use of 4 medicines   0.7   0.0   0.8   0.9  
Experienced side effects          
   No 132 51.5 146 48.6 134 37.3 211 29.9 < 0.001*
   Yes   48.5   51.4   62.7   70.1  
Knowledge b          
   About the risk of having a road accident when using medicinesc 2.4 (1.0) 2.4 (1.1) 2.3 (1.0) 2.3 (0.9) 0.882
Attitude b          
   Use of medicines and drivingc 2.3 (0.9) 2.8 (1.4) 1.9 (0.8) 2.1 (1.1) < 0.001*
   Consequences of driving under the influence of impairing medicinesd 3.5 (0.9) 4.0 (0.9) 3.4 (0.9) 3.6 (0.8) < 0.001*
Reported behaviour - change in the frequency of driving          
   No 42 61.9 64 71.9 79 81.0 120 74.2 0.149
   Yes   38.1   28.1   19.0   25.8  
Reported behaviour - change in the use of driving-impairing medicines          
   No 38 57.9 65 55.4 75 81.3 118 56.8 0.002*
   Yes   42.1   44.6   18.7   43.2  
  1. aThe percentage refers to within the country
  2. bKnowledge and attitude results presented in terms of mean (standard deviation)
  3. c5-item scale (1 = totally disagree; 2 = disagree; 3 = no opinion; 4 = agree; 5 = totally agree). Totally disagree means that the patient does not perceive any risk of driving under the influence of medicines
  4. d5-item scale (1 = totally disagree; 2 = disagree; 3 = no opinion; 4 = agree; 5 = totally agree). Totally disagree means that patients have a negative opinion on the influence of medicines on driving performance and about the consequences of that behaviour
  5. * p-value < 0.05 considered to be statistically significant. P-value was calculated by means of the Chi-square test.