Cross-cultural adaptation, reliability and validity of the Cantonese-Chinese Cumberland Ankle Instability Tool (CAIT-HK)

Abstract

Acute lateral ankle sprains are common amongst athletes, and screening is essential in preventing these long-term sequelae. Self-reported questionnaires, such as the Cumberland Ankle Instability Tool (CAIT), may help identify individuals with chronic ankle instability. To date, a Cantonese-Chinese version of the CAIT does not exist.A cross-cultural adaptation and validation of the CAIT were carried out: 46 individuals who were native in Cantonese completed the Cantonese-Chinese version of the CAIT and Chinese Foot and Ankle Outcome Score.For the test-retest analysis, the intraclass correlation coefficient was 0.874. Internal consistency showed a Cronbach’s ɑ value of 0.726. Construct validity against the FAOS was fair but statistically significant with a Spearman’s correlation coefficient of 0.353, 0.460, 0.303, 0.369 and 0.493 for the categories of symptoms, pain, daily function, sports function, and quality of life, respectively.A cutoff score of 20.5 was determined to differentiate healthy individuals from those with chronic ankle instability for this study population. The original English CAIT was successfully translated, cross-culturally adapted and validated into Cantonese-Chinese.