Table 5.

Confusion matrices for three-class and four-class classification approaches for pain stimulation intensity and pain sensation

		Three-Class Classification						Four-Class Classification
		Estimated Intensity			Estimated Sensation			Estimated Intensity				Estimated Sensation
		0	1	2	0	1	2	0	1	2	3	0	1	2	3
Trueclass	0	0.83	0.14	0.03	0.83	0.13	0.04	0.77	0.15	0.07	0.02	0.75	0.17	0.05	0.03
	1	0.21	0.52	0.27	0.21	0.42	0.37	0.20	0.39	0.25	0.17	0.27	0.26	0.24	0.23
	2	0.15	0.40	0.45	0.14	0.33	0.53	0.13	0.25	0.38	0.24	0.13	0.27	0.26	0.34
	3	N/A			N/A			0.09	0.24	0.31	0.36	0.10	0.17	0.23	0.50