[Cross-cultural adaptation and Spanish validation of Patient Satisfaction Questionnaire in dermatology (PSQ-18)]. / Validación y adaptación transcultural del cuestionario de satisfacción en Dermatología (PSQ-18).

BACKGROUND AND OBJECTIVE: Patient satisfaction has become one of the most important outcome measures of quality of care. This study aimed to present the translation, cultural adaptation and validation of a Spanish version of the Patient Satisfaction Questionnaire (PSQ-18) in a sample of Spanish dermatology patients. METHODS: Cross-cultural linguistic adaptation and translation-backtranslation processes were performed following accepted international guidelines. The psychometric properties, reliability and construct validity were evaluated with Cronbach's alpha and confirmatory factorial analysis respectively. The intraclass correlation coefficient was calculated in a test-retest study, which was conducted on randomly selected participants twice with a 14-21 days interval. RESULTS: 240 participants completed the cross-culturally adapted Spanish questionnaire agreed by the researchers. Internal consistency was high (Cronbach's alpha coefficient of 0.834) and confirmatory factorial analysis showed a good model fitting to the model proposed in the original version of the scale. The intraclass correlation coefficients for all the items on the questionnaire were higher than 0.8. CONCLUSIóN: PSQ-18 proved to be a valid and reliable instrument, with psychometric properties suitable for the assessment of satisfaction among dermatology patients.