Translation and validation of the Portuguese version of the Keratoconus Outcomes Research Questionnaire (KORQ)

ABSTRACT Purpose: The purpose of this study is to translate and validate a Portuguese version the Keratoconus Outcomes Research Questionnaire. Questionnaire psychometrically robust valid instrument used assess impact keratoconus on activity limitations symptoms. Methods: We performed translation, cross-cultural adaptation, validation initial translation English language was by two independent native speaker translators, followed an interdisciplinary panel evaluation translated version. then back-translated into speakers, comparison with original same panel. For subsequent validation, questionnaire administered at different times population 30 subjects, results were compared in concordance analysis. Results: back-translation determined be correct. Thirty participants enrolled (mean age, 29.23 ± 7.56 years). Nine questions (31%) had almost perfect agreement (questions 3, 4, 5, 8, 18, 22, 27, 28, 29), 15 (51.7%) substantial 1, 2, 6, 7, 9, 12, 14, 15, 16, 17, 20, 21, 23, 25, 26), 4 (13.8%) moderate 10, 11, 19, 24) 1 question (3.5%) reasonable (question 13). High-correlation coefficients obtained when comparing application second sample individuals, which indicated excellent regard results, repeatability, reliability. Conclusions: This validated can applied larger intent quality life patients overall Brazilian as well distinct regions country.