Patients with chronic diabetes may have a physical performance decline, which significantly increases the risk of falling. The study aimed to assess the validity of the Circular Tandem Walk Test (CTWT) in determining fall risk among older community-dwelling Thais with type 2 diabetes mellitus (T2DM). This is a cross-sectional diagnostic study of 71 older participants with T2DM from various communities. The participants were divided into “faller” (who had experienced one or more fall events) and “non-faller” groups based on 6-month fall history data. They were then interviewed about their fear of falling (FOF) using a single question and the Falls Efficacy Scale International (FES-I), followed by the CTWT. Thirty-five participants reported having fallen in the past six months. Significant differences were in the fallers and non-fallers CTWT, FOF, and FES-I scores (p < 0.001). CTWT results were significantly correlated with FOF (rpb = 0.605, p < 0.001), FES-I (rho = 0.837, p < 0.001), and number of falls (rho = 0.736, p < 0.001). The study suggested that the cutoff score for CTWT is 15.2 s, with a sensitivity = 80.00, specificity = 86.11, and AUC = 0.915. This study demonstrated the validity of the CTWT for determining the risk of falls in older community-dwelling individuals with T2DM. Implementing this tool in a community setting would be helpful in the initial screening and referral of data by concerned healthcare professionals. However, further studies may be needed to explore the reliability of CTWT and ensure the appropriate clinical use of CTWT by healthcare professionals.
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