Background and Objective: A German dermatological quality-of-life instrument was developed on the basis of a representive and standardised patient population. Patient/Methods: Qualitative interviews were performed in 633 patients. Based on the answers of 20 patients from each of the 10 most frequent diagnostic groups, items were identified and a questionnaire developed. This was used in 704 patients and the number of items was reduced. Results: The long version of the instrument has 72 items. By factor analysis the number of items was reduced. The final instrument consisting of 36 questions was used in 842 outpatients and quality assessments (validity, reliability, responsiveness) were performed. Conclusions: In the use within a large patient sample the DIELH proved to be feasible, valid, reliable and responsive.
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Background and Objective: A German dermatological quality-of-life instrument was developed on the basis of a representive and standardised patient population. Patient/Methods: Qualitative interviews were performed in 633 patients. Based on the answers of 20 patients from each of the 10 most frequent diagnostic groups, items were identified and a questionnaire developed. This was used in 704 patients and the number of items was reduced. Results: The long version of the instrument has 72 items. By...
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