Objective: This study aims to evaluate the validity and reliability of the Timed 360° Turn Test (360°-TTT) in measuring dynamic balance in patients who have undergone anterior cruciate ligament reconstruction (ACL-R) surgery.
Materials and Methods: Forty patients who underwent ACL-R surgery were included in this study. The reliability analysis involved evaluating the inter-rater and test-retest reliability of the test duration and number of steps of the 360°-TTT by calculating intraclass correlation coefficients (ICCs). To assess the concurrent validity of the 360°-TTT, correlations between the test duration and number of steps of the 360°-TTT and the Berg Balance Scale (BBS) and Time Up and Go (TUG) test were examined. Additionally, standard error of measurement95 (SEM95) and minimal detectable change95 (MDC95) values were computed for the test duration and number of steps of the 360°-TTT.
Results: The inter-rater and test-retest reliability for both the test duration and the number of steps within the 360°-TTT demonstrated excellence, with ICCs of 0.83, 0.91, 0.88, and 0.87, respectively. A statistically significant correlation was observed between the 360°-TTT and both the BBS and the TUG (p<0.001). The inter-rater and test-retest reliability of the raters was visually confirmed using Bland-Altman plots, further affirming the consistency of outcomes. The SEM95 and MDC95 values for the test duration and number of steps of the 360°-TTT were 0.09, 0.24, 0.18, and 0.49, respectively.
Conclusion: The 360°-TTT is a reliable and valid method for evaluating dynamic balance in patients undergoing ACL-R surgery.