Table 3.

Step length RMSE, RA, and intraclass correlations for different groups of participants in the test set (recall Table 1, top panel)

	OA participants (n = 81)			MCI participants (n = 27)			PD patients (n = 149)
	RMSE [cm]	RA [%]	ICC (2,1)	RMSE [cm]	RA [%]	ICC (2,1)	RMSE [cm]	RA [%]	ICC (2,1)
Single SL	6.39 ± 0.52	9.20 ± 0.61	0.90 ± 0.02	5.27 ± 0.93	8.22 ± 2.16	0.77 ± 0.15	6.64 ± 0.25	9.59 ± 0.48	0.89 ± 0.01
3-average SL	5.26 ± 0.45	7.88 ± 0.57	0.92 ± 0.01	4.29 ± 1.12	6.90 ± 2.38	0.82 ± 0.13	5.27 ± 0.23	7.91 ± 0.50	0.92 ± 0.01
5-average SL	5.06 ± 0.45	7.58 ± 0.58	0.93 ± 0.01	4.09 ± 1.17	6.65 ± 2.44	0.83 ± 0.13	5.03 ± 0.23	7.56 ± 0.49	0.92 ± 0.01
10-average SL	4.88 ± 0.45	7.30 ± 0.57	0.93 ± 0.01	3.92 ± 1.22	6.43 ± 2.51	0.83 ± 0.13	4.83 ± 0.24	7.26 ± 0.48	0.93 ± 0.01

The test set refers to Table 1 top panel. Values are presented as mean ± standard deviation. RMSE Root mean square error. The correlation is the Pearson’s coefficient between the model estimate and the reference value.

OA older adults, PD Parkinson’s disease, MCI mild cognitive impairment, SL step length, RA relative error.