Table 4.

Sensitivity and specificity of accelerometry metrics to differentiate subgroups.

Groups	Accelerometry	AUC	Sensitivity	Specificity	NPV	PPV	Delong's test p-value
Control vs. patient	ActiGraph steps/minute	0.683	0.746	0.586	0.618	0.719	p = 0.286
	Smartphone varVM	0.750	0.567	0.843	0.776	0.670
RRMS vs. PP-SP/MS	ActiGraph steps/minute	0.613	0,767	0.484	0.696	0.575	p < 0.001
	Smartphone varVM	0.946	0.939	0.853	0.935	0.861
Impaired vs. minimal impaired	ActiGraph steps/minute	0.567	0.426	0.750	0.308	0.833	p = 0.153
	Smartphone varVM	0.728	0.694	0.833	0.500	0.919

ROC analyses. The area under the curve (AUC) results were compared with Delong's test.

AUC, area under the curve; NPV, negative predictive value; PPV, positive predictive value.