Development and Evaluation of a Chinese Version of the Adult Strabismus Questionnaire (AS-20)

ABSTRACTPurpose: The 20-item Adult Strabismus Quality of Life Questionnaire (AS-20) was developed in the United States to assess health-related quality of life (HRQOL) of adult patients with strabismus. At present, no questionnaire is available for assessing HRQOL specifically for adult patients with strabismus in China. A Chinese version of the AS-20 (CAS-20) was developed and its reliability and validity evaluated in adult patients with strabismus in China.Methods: The AS-20 was translated into Chinese. A total of 102 adults with strabismus and 102 visually healthy adult controls were recruited to answer the 5-level Likert items of the CAS-20. Demographic (age and sex) and clinical data of the recruited subjects were documented. Internal consistency, test-retest reliability, correlations between items and their respective subscale, and construct validity were evaluated to assess questionnaire reliability and validity.Results: The number of responses for each item was calculated, as well as individual it...