[Hairdex: a tool for evaluation of disease-specific quality of life in patients with hair diseases].

Because of a strong reduction of life quality in patients with hair loss, a special questionnaire was developed following the general Skindex questionnaire for dermatoses. The Hairdex was evaluated in 75 female hair patients. The aim of the study was to prove the questionnaire's statistical values, reliability, validity, general acceptance and accuracy. The clinical manifestation of hair loss was categorized as "not visible", slightly visible" and "obviously visible". The hair loss lead to great differences in the life quality of both the patients with obvious hair loss and in patients with non-visible hair loss, especially in the categories "emotions", "self-confidence" and "stigmatization". The convergent and discriminant validity of the questionnaire was satisfactory. The acceptance of the questionnaire was very good with 90%. The hairdex-questionnaire represents a reliable and patient-oriented instrument for evaluation of life quality in hair diseases. The reliability of the questionnaire concerning longitudinal therapeutic effects will need to be investigated in further studies.