Table 5.

K-Nearest Neighbor model re-substitution loss, prediction loss and performance strength during testing.

F rank	Training model	Rloss	Kloss	Average loss	ROC (AUC)	False classification (%)
						Control	OA
1	Maximum external hip abduction moment	0.17	0.41	0.29 (0.17)	0.47	26	91
2	S/R	0.10	0.10	0.10 (0.00)	0.82	0	36
3	First peak external knee adduction moment	0.06	0.10	0.08 (0.03)	0.88	8	18
4	Second peak external knee adduction moment	0.07	0.09	0.08 (0.02)	0.94	4	9
5	Symptom	0.10	0.10	0.10 (0.00)	0.95	0	9
6	Maximum vertical loading rate	0.24	0.25	0.24 (0.01)	0.74	15	36
7	First peak external hip adduction moment	0.23	0.36	0.29 (0.09)	0.41	62	46
8	Maximum external knee abduction moment	0.11	0.14	0.13 (0.02)	0.87	23	0
9	QOL	0.07	0.07	0.07 (0.00)	0.98	4	0
10	Second peak external hip adduction moment	0.24	0.38	0.31 (0.10)	0.62	4	73
11	ADL	0.11	0.11	0.11 (0.00)	0.92	12	9
12	Pain	0.08	0.13	0.10 (0.03)	0.79	15	27
	All self-reported outcomes	0.08	0.08	0.08 (0.00)	0.82	0	23
	All biomechanical parameters	0.02	0.02	0.02 (0.00)	0.92	8	9
	All biomechanical parameters and QOL outcome	0.01	0.03	0.02 (0.01)	1.00	0	0