Table 4.

Classification of patients to frail and non-frail categories using velocities (cut-off = 0.833 m/s) from stopwatch. Velocities computed using smartphone walking signals are also listed below.

ID	Classification Frail (F), Non-Frail (NF)	Stopwatch Velocity			Smartphone Velocity			Classification Errors
		Mean	SD	CV	Mean	SD	CV
ID04	NF	0.92	0.02	2.44	0.81	0.04	4.56	X
ID06	F	0.59	0.07	12.25	0.61	0.03	4.29
ID08	F	0.73	0.05	6.44	0.66	0.06	9.70
ID09	NF	1.21	0.07	5.89	1.23	0.22	17.56
ID10	NF	1.06	0.14	12.95	0.97	0.05	5.41
ID11	F	0.73	0.03	3.45	0.67	0.04	6.68
ID13	F	0.83	0.09	10.27	0.75	0.07	9.11
ID14	NF	1.06	0.02	2.34	0.81	0.16	20.38	X
ID17	F	0.67	0.01	1.51	0.58	0.05	8.60
ID18	NF	0.91	0.03	2.97	0.70	0.07	10.36	X
ID19	F	0.58	0.09	15.04	0.59	0.14	24.14
ID20	NF	0.97	0.10	9.92	0.88	0.04	4.95
ID21	F	0.83	0.06	7.02	0.72	0.05	7.00
ID22	F	0.74	0.05	6.95	0.65	0.10	16.11
ID23	NF	0.95	0.09	9.24	0.77	0.06	7.71
ID24	NF	1.00	0.06	6.33	1.01	0.10	10.04