Fig. 4

Accuracy of propulsion point metrics. Comparison of direct (i.e., forceplate) and indirect (i.e., IMU) measurements of the a peak propulsion magnitude, b peak propulsion timing, and c propulsion impulse. RMSE and ICC means are reported for each training and validation analysis. A single statistical outlier—identified with a red outline—was identified for the post-stroke peak propulsion validation analysis. The findings with and without the outlier are presented, respectively, in parentheses and with an *. Note: high homogeneity in (b, Left), with multiple points overlaid. See Supplementary Table 2 for ICC 95% confidence interval