Bland-Altman plot of changes in participants’ normal speed (level-ground walking vs treadmill walking) at same set speed from day 1 to day 2. Solid line indicates mean difference between two measures and dotted lines indicate 95% confidence interval (CI) (±1.96 standard deviation) about mean agreement. Data points above and below CI were considered outliers. VM = vector magnitude.

Paul Hendrick, MPhty; et.al