Table 4. Difference of the feature values between the drowsy and alert states (region B, 5 sec window).

	Region B (drowsy – alert)
Feature	Channel 9	Channel 10	Channel 11	Channel 12	Channel 13	Channel 14
M	1.7E-03	−9.5E-04	4.7E-04	−8.6E-04	−3.4E-04	−8.1E-04
P	1.7E-03	−9.7E-04	4.6E-04	−8.6E-04	−3.4E-04	−8.0E-04
SoP	3.9E-04	0.0E + 00	7.8E-05	0.0E + 00	0.0E + 00	0.0E + 00
NoP	17	0	28	0	0	0
M*	−1.1E-04	−4.6E-04	−3.0E-04	−3.8E-04	−4.5E-04	−3.1E-04
skew	−3.9E-02	1.4E-02	−3.2E-02	−1.3E-02	−1.4E-02	−3.7E-03
kurt	3.7E-02	6.9E-02	−5.3E-02	5.5E-02	4.6E-02	−7.3E-02
SS	1.7E-03	−9.7E-04	4.6E-04	−8.6E-04	−3.4E-04	−8.0E-04
f	5.2E-14	4.0E-13	1.5E-14	2.2E-13	1.1E-13	1.7E-13
	Channel 15	Channel 16	Channel 17	Channel 18	Channel 19	Channel 20
Feat.	8.9E-04	−7.7E-04	1.3E-03	5.1E-04	2.5E-03	2.1E-03
M	9.1E-04	−7.5E-04	1.3E-03	5.0E-04	2.6E-03	2.1E-03
P	2.6E-04	0.0E + 00	3.6E-04	0.0E + 00	7.4E-04	6.9E-04
SoP	33	0	22	0	19	21
NoP	−2.4E-04	−2.4E-04	−1.1E-04	−4.2E-05	4.1E-04	2.5E-04
M*	1.7E-02	−5.8E-03	−1.9E-02	4.5E-02	8.3E-03	5.4E-02
skew	−7.7E-02	−1.8E-02	−1.6E-02	−2.0E-02	4.1E-02	−5.6E-02
kurt	3.0E-13	−3.0E-11	−3.4E-12	−4.6E-13	3.3E-14	7.0E-15
SS	−1.7E-02	0.0E + 00	−2.2E-02	0.0E + 00	−2.6E-02	−3.3E-02

Note: * indicates the mean value computed from ∆HbR.