Table 1 Statements on changes in reported behaviour, concerning driving ability and use of driving-impairing medicines

Statements on changes in frequency of driving

Participants decided not to change frequency of driving because:

   • "I did not think the information was relevant to me";

   • "It was not feasible for me to change my frequency of driving";

   • "I did not notice any negative effects that influenced my driving ability";

   • "I found information stating that the medicine does not have any driving-impairing effects";

   • "other reasons".

Participants decided to change frequency of driving because:

   • "I decided not to drive my motorised vehicle anymore";

   • "I decided to drive/ride a motorised vehicle less often";

   • "I decided to drive/ride a motorised vehicle on less parts of the day" (e.g. only during day light);

   • "other reasons".

Statements on changes in the use of driving-impairing medicines

Participants decided not to change the use of driving-impairing medicines because:

   • "I did not think the information was relevant to me";

   • "There was no alternative medicine available";

   • "other reasons".

Participants decided to change the use of driving-impairing medicines because:

   • "I decided not to use the medicine";

   • "I decided to use (most of) the medicine at night instead of during the day";

   • "I decided to only use the medicine when I did not need to drive";

   • "I asked for or I was prescribed a medicine causing less impairment of the ability to drive".

   • "other reasons".