Please answer all 9 questions based on your ankle condition and experiences over the past month. For each question, select the response that best describes your situation. Consider your most affected ankle when answering. The questionnaire takes approximately 3-5 minutes to complete.

The CAIT uses a variable scoring system across 9 items. Each question has different response options with associated point values. The total score ranges from 0 to 30, where higher scores indicate better ankle stability and function. Scores are calculated by summing the point values from all 9 items. A score of 27 or less (out of 30) is generally considered indicative of functional ankle instability, while a score below 24 strongly suggests chronic ankle instability. The questionnaire does not use subscales; rather, it provides a single total score representing overall ankle stability.

The Cumberland Ankle Instability Tool was developed by Claire E. Hiller and colleagues at the University of Sydney, Australia. The questionnaire was published in 2006 following extensive validation studies with athletes and individuals experiencing chronic ankle instability. The development process included item generation, expert review, and psychometric testing to ensure comprehensive assessment of functional ankle instability.

Please answer all 9 questions based on your ankle condition and experiences over the past month. For each question, select the response that best describes your situation. Consider your most affected ankle when answering. The questionnaire takes approximately 3-5 minutes to complete.

The CAIT is a self-reported questionnaire and may be influenced by patient recall bias or subjective perception of symptoms. It focuses specifically on functional ankle instability and does not assess structural instability or ligamentous laxity. The questionnaire may not be sensitive enough to detect subtle changes in highly functional individuals. Some questions reference specific activities that may not be relevant to all populations (e.g., non-athletes). The CAIT should be used in conjunction with clinical examination and other objective measures for comprehensive ankle assessment.