92 Chapter 6 (one participant one time, two participants five times). Moreover, the comfortable treadmill speed did not significantly differ between fallers and non-fallers (0.84 ± 0.31 ms-1 vs. 0.92 ± 0.22 ms-1; p=0.39). Fallers scored significantly worse on the ABC-6 compared to non-fallers (p=0.001), and the ABC showed excellent discrimination between fallers and non-fallers (AUC = 0.84). Furthermore, the Mini-BEST showed acceptable discriminatory ability between fallers and non-fallers fallers scored significantly worse on the Mini-BEST compared to non-fallers (AUC = 0.75). The gait capacity and gait stability measures showed poor discriminatory ability between fallers and non-fallers (AUCs < 0.70; Table 2). Table 2: Differences between fallers and non-fallers regarding clinical and biomechanical measures at comfortable treadmill velocity. Fallers (n=14) Non-Fallers (n=18) P-value AUC Clinical Assessment Activities-specific Balance Confidence scale – six-item 44 ± 19 78 ± 14 0.001 0.837 Mini-BEST 17.6 ± 4.1 20.8 ± 4.5 0.046 0.750 Ten-meter walk test – comfortable (ms-1) 1.2 ± 0.3 1.4 ± 0.2 0.081 0.659 Ten-meter walk test – fast (ms-1) 1.6 ± 0.4 1.8 ± 0.3 0.251 0.615 Biomechanical assessment Step width (mm) 135 ± 43 120 ± 44 0.350 0.433 Coefficient of variation • Step length (%) 7.4 ± 5.7 7.2 ± 5.3 0.808 0.472 • Step time (%) 5.7 ± 0.4 4.5 ± 2.1 0.587 0.560 • Step width (%) 27.3 ± 14.9 26.8 ± 12.5 0.925 0.488 Mediolateral Margin of Stability (MoS) (mm) 40.3 ± 17.7 51.2 ± 15.2 0.071 0.690 Variability of MoS (mm) 13.3 ± 8.8 13.7 ± 7.7 0.866 0.480 Mediolateral Foot Placement Deviation (cm) 1.0 ± 0.3 1.0 ± 0.3 0.377 0.595 Local Divergence Exponents • Trunk - mediolateral 1.8 ± 0.4 1.8 ± 0.3 0.878 0.480 • Trunk - anteroposterior 1.7 ± 0.2 1.8 ± 0.3 0.737 0.500 • Trunk - vertical 1.4 ± 0.2 1.4 ± 0.2 0.764 0.464 • Pelvis - mediolateral 1.3 ± 0.2 1.3 ± 0.2 0.706 0.563 • Pelvis - anteroposterior 1.5 ± 0.2 1.4 ± 0.3 0.574 0.560 • Pelvis - vertical 1.3 ± 0.2 1.3 ± 0.1 0.266 0.611 Values displayed are means ± standard deviation. Abbreviations: Mini-BEST: Mini Balance Evaluation Systems Test. Mini-BEST ranges between 0-28 points; Activities-specific Balance Confidence scale – six-item ranges between 0-100 points.
RkJQdWJsaXNoZXIy MjY0ODMw