Table 2.

Quality of fit of the regressions for step (SPS), impulse (IMS) and first peak symmetry (P1S) indexes vs stance symmetry index (SNS)

	SPS vs SNS		IMS vs SNS		P1S vs SNS
	R 2	RMSE	R 2	RMSE	R 2	RMSE
TFM	0,97	0,042	0,81	0,137	0,06	0,154
TFC	0,81	0,042	0,69	0,090	0,04	0,177
TT	0,70	0,036	0,37	0,128	0,20	0,289
CONTROLS	0,51	0,017	0,47	0,040	0,05	0,038
ALL	0,95	0,037	0,79	0,103	0,00	0,247

The coefficient of determination (R²), and the Root Mean Squared Error (RMSE) are reported for every group (TFM transfemoral mechanical knee users, TFC transfemoral C-leg users, TT transtibial amputees, Controls), and for all subjects altogether (ALL). Bold: R² > 0.64, Regular: 0.36 < R² < 0.64, Italic: R² < 0.36 [30]