期刊
ARCHIVES OF PHYSICAL MEDICINE AND REHABILITATION
卷 87, 期 9, 页码 1235-1241出版社
W B SAUNDERS CO-ELSEVIER INC
DOI: 10.1016/j.apmr.2006.05.022
关键词
ankle; joint instability; questionnaires; rehabilitation; sprains and strains
Objective: To test the Cumberland Ankle Instability Tool (CAIT), a 9-item 30-point scale, for measuring severity of functional ankle instability. Design: Cross-sectional study. Setting: General community. Participants: Volunteer sample of 236 subjects. Interventions: Not applicable. Main Outcome Measures: Concurrent validity by comparison with the Lower Extremity Functional Scale (LEFS) and a visual analog scale (VAS) of global perception of ankle instability by using the Spearman p. Construct validity and internal reliability with Rasch analysis using goodness-of-fit statistics for items and subjects, separation of subjects, correlation of items to the total scale, and a Cronbach a equivalent. Discrimination score for functional ankle instability by maximizing the Youden index and tested for sensitivity and specificity. Test-retest reliability by intraclass correlation coefficient, model 2,1 (ICC2,1). Results: There were significant correlations between the CAIT and LEFS (rho=.50, P <.01) and VAS (rho=.76, P <.01). Construct validity and internal reliability were acceptable (alpha=.83; point measure correlation for all items, > 0.5; item reliability index, .99). The threshold CAIT score was 27.5 (Youden index, 68.1); sensitivity was 82.9% and specificity was 74.7%. Test-retest reliability was excellent (ICC2.1 = .96). Conclusions: CAIT is a simple, valid, and reliable tool to measure severity of functional ankle instability.
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