Turkish version of Skindex-29

Background There is a clear need for a useable measure of health-related quality-of-life (HRQoL) for dermatology patients. Most of the existing dermatology-specific measures were developed for the English language, and these measures should be adapted for use in other cultures. Objective To adapt Skindex-29 (one of the most widely recognized dermatology-specific quality-of-life indices) for the Turkish cultural setting. Patients and methods Forward and backward translations were carried out, and for doubtful items the process was repeated until a satisfactory agreement with the original version of Skindex-29 was achieved. The intermediate Turkish version was administered to a group of 20 randomly selected Turkish adults with and without skin conditions. The final Turkish version of the Skindex-29 was administered to 456 patients attending Osmangazi University Dermatology outpatient clinics. Reliability, construct and content validity were assessed. Results The instrument was internally consistent, with Cronbach's alpha-coefficients of 0.94, 0.76, 0.88, and 0.92 for entire questionnaire, symptom, emotional, and functional scales, respectively. The Turkish Skindex-29 demonstrated construct and content validity. Conclusion Our evaluation of the Skindex-29 indicates that the instrument is a comprehensible, useable, reliable and valid measure of quality-of-life for Turkish dermatologic patients.