Influence of virtual reality and task complexity on digital health metrics assessing upper limb function

Table 2 Responsiveness (standardized response mean SRM and number of individuals with changes exceeding the measurement noise # > SRD) and concurrent validity (correlation ρ to Nine Hole Peg Test NHPT and Box and Block Test BBT) for persons with MS

Metric	PPIT				VPIT
Metric	SRM	# > SRD	ρ BBT	ρ NHPT	SRM	# > SRD	ρ BBT	ρ NHPT
Log Jerk TP	− 0.32	5	− 0.84	0.68	− 0.46	1	− 0.56	0.63
Log Jerk RT	0.19	4	− 0.62	0.75	− 0.35*	0	− 0.58	0.67
SPARC RT	− 0.12	7	− 0.50	0.44	− 0.29	10	− 0.67	0.79
Path length ratio TP	0.02	5	− 0.14	0.27	− 0.13	7	− 0.45	0.32
Path length ratio RT	− 0.17	3	− 0.49	0.45	− 0.46*	7	− 0.49	0.32
Velocity max. RT	0.21	0	0.48	-0.65	0.16	3	0.53	− 0.56
Jerk peg approach	0.16*	8	− 0.50	0.67	− 0.43	10	− 0.38	0.28
Force rate num. peaks TP	− 0.44	2	− 0.57	0.52	− 0.53	5	− 0.42	0.44
Force rate SPARC TP	0.02	1	− 0.53	0.41	− 0.47*	1	− 0.34	0.50
Force rate SPARC hole approach	0.04	3	− 0.48	0.39	− 0.42*	8	− 0.57	0.47
Aggregate (abs. values)	0.16 ± 0.17	3.5 ± 3.0	0.50 ± 0.09	0.48 ± 0.27	0.43 ± 0.18	6.0 ± 7.0	0.51 ± 0.15	0.49 ± 0.31

*Indicates metrics that had a statistically significant change over the rehabilitation program (1 for the PPIT, 4 for the VPIT). Aggregate indicates the median ± inter-quartile range of the absolute (abs.) value across metrics

ISSN: 1743-0003