Ambulatory Monitoring of Physical Activity Based on Knee Flexion/Extension Measured by Inductive Sensor Technology

Table 3

Confusion matrix summarizes results, in terms of percentage of labeled activities predicted by the algorithm belonging to a certain activity. Absolute values are provided between brackets.

	Predicted
	Normal walking	Stair ascend	Stair descent	Fast locomotion	No detection
Labeled
Normal walking	91.3; (442)	2.3; (12)	0.6; (3)	0.4; (2)	5.4; (28)
Stair ascend	0; (0)	100; (97)	0; (0)	0; (0)	0; (0)
Stair descent	7.6; (7)	0; (0)	90.2; (83)	0; (0)	2.2; (2)
Fast locomotion	9.4; (17)	0; (0)	6.5; (10)	83.1; (155)	1; (2)