Table 4.

Modification of the questionnaire

Comprehension problem	Modification of the questionnaire
Respondents did not distinguish between the general practitioner, internist and diabetologist.	Additional instructions introduced
Respondents did not distinguish between specialists working in the ambulatory sector and in the hospital.	Wording changed
Respondents did not distinguish between a psychiatrist, a psychotherapist, and a psychologist.	Explanations added
Respondents did not distinguish between emergency care and ambulatory healthcare services provided in hospital.	Wording changed
Respondents mentioned overnight hospital stays in response to the question asking about emergency care visits.	Wording changed
Respondents found the question with regard to changes in diabetes-specific therapy (medication, insulin) in the previous 6 months unclear or difficult.	Two separate questions referring to medication and insulin formulated
Question about out-of-pocket expenditure on medication was not understood in a consistent way.	Two separate questions referring to the prescription medication and over-the-counter medication formulated