Mirshahi Maryam, Halabchi Farzin, Golbakhsh Mohammadreza, Saadat Soheil
Sports Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran.
Sina Hospital, Tehran University of Medical Sciences, Tehran, Iran.
Adv J Emerg Med. 2019 Jun 6;3(3):e26. doi: 10.22114/ajem.v0i0.180. eCollection 2019 Summer.
The Cumberland Ankle Instability Tool (CAIT) is a valid instrument for determining the presence and severity of functional ankle instability. This questionnaire was recently cross-culturally adapted into Persian; however, the reliability of the Persian version has not been examined in athletes. CAIT has also been used with various independently-selected cut-off scores to determine instability.
The present study was conducted to evaluate the psychometric properties of the Persian version of CAIT and to determine its optimal cut-off score in athletic populations.
One-hundred and sixteen athletes (volleyball, basketball and track and field players) over 18 years old both with and without ankle instability completed the Persian version of the CAIT. The internal consistency, test-retest reliability and discriminative ability of the tool were assessed. A receiver operating characteristic (ROC) curve was drawn to confirm the cut-off point of the Persian version of CAIT using the Youden index.
The average CAIT score was 25.14±4.98 for the right and 25.76±4.94 for the left ankle. The Persian version of CAIT had a good internal consistency (Cronbach's α of 0.78 for the right ankle and 0.79 for the left ankle) and substantial reliability (ICC = 0.88; 95% CI: 0.86 - 0.90) in athletes. No ceiling or floor effects were observed. The optimal cut-off score for discriminating between athletes with and without FAI was 24.
The Persian version of CAIT was shown to be a reliable tool for assessing functional ankle instability among Iranian athletes.
坎伯兰踝关节不稳定工具（CAIT）是一种用于确定功能性踝关节不稳定的存在及其严重程度的有效工具。该问卷最近已进行跨文化改编为波斯语版本；然而，波斯语版本在运动员中的可靠性尚未得到检验。CAIT也已使用各种独立选择的临界值来确定踝关节不稳定情况。
本研究旨在评估波斯语版CAIT的心理测量特性，并确定其在运动员群体中的最佳临界值。
116名18岁以上有或无踝关节不稳定的运动员（排球、篮球和田径运动员）完成了波斯语版的CAIT。评估了该工具的内部一致性、重测信度和区分能力。绘制了受试者工作特征（ROC）曲线，使用约登指数确定波斯语版CAIT的临界值。
右踝关节的平均CAIT评分为25.14±4.98，左踝关节为25.76±4.94。波斯语版CAIT在运动员中具有良好的内部一致性（右踝关节的Cronbach's α为0.78，左踝关节为0.79）和较高的信度（ICC = 0.88；95% CI：0.86 - 0.90）。未观察到天花板效应或地板效应。区分有和没有功能性踝关节不稳定（FAI）的运动员的最佳临界值为24。
波斯语版CAIT被证明是评估伊朗运动员功能性踝关节不稳定的可靠工具。
