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Bland–Altman plot for the CS-30, TUG, and SOLEO tests. The solid red line parallel to the x-axis represents the mean difference between two measurements, whereas the two dotted red lines indicate the 95% confidence interval. The solid black lines represent the permissible range for criterion-related validation. A 30-s chair-stand test (CS-30). B Time Up and Go test (TUG). C Standing on one leg with eyes open (SOLEO). ICT, information and communications technology
