Table 4.

Values for the group mean error ( me ), mean standard deviation of the subject error ( sde ), mean absolute error ( mae ) and the percent of it ( %mae ) in estimating stride length for the four (healthy elderly – E, hemiparetic – H, Parkinson’s disease – P and choreic – C)

Group	me(sde) [mm]		mae[mm]		%mae
	V1	V2	V1	V2	V1	V2
E	2 (19)	0 (19)	18	15	1%	1%
H	−6 (27)	−11 (22)	21	20	3%	3%
P	4 (21)	1 (19)	18	16	2%	2%
C	−8 (29)	−7 (31)	26	24	2%	2%