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

Table 2

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	95.9; (5979)	0.9; (55)	0.5; (29)	0.3; (23)	2.4; (148)
Stair ascend	1.9; (5)	90.3; (244)	2.2; (6)	0.4; (1)	5.2; (14)
Stair descent	10.4; (24)	0.4; (1)	78.3; (180)	5.7; (13)	5.2; (12)
Fast locomotion	4.2; (21)	0.0; (0)	7.0; (35)	82.2; (410)	6.6; (33)