Figure 3

SMSW in comparison with the T25FW. Measuring agreement of gait speed detection of MS patients (red dots) and healthy subjects (grey triangles) with standard T25FW and SMSW. To be able to directly compare SMSW and T25FW in a Bland-Altman analysis, the SMSW time equivalent of walking 25-feet at the detected average speed was calculated. A) Results are plotted against each other. The solid line represents an R² of 0.392 from a linear regression analysis; the long dashed lines are 95% confidence intervals to the mean. The short-dashed line represents the theoretical test equality (T25FW = SMSW). B) Bland-Altman plot comparison between T25FW and SMSW average speed. B) The difference of the mean is -0.4 sec (solid line). Long dashed lines are 2x standard deviation.