Table 2.

Microsleep frequency (absolute and normalized) during each MWT trial compared between groups.

	Trial 1		Trial 2		Trial 3		Trial 4
	Total Microsleeps	Microsleeps/min	Total Microsleeps	Microsleeps/min	Total Microsleeps	Microsleeps/min	Total Microsleeps	Microsleeps/min
Treated OSA	1.5 ± 0.5	0.07 ± 0.03	1.7 ± 0.5	0.11 ± 0.03	3.0 ± 0.8	0.13 ± 0.04	1.7 ± 0.6	0.05 ± 0.02
Untreated OSA	4.0 ± 1.0	0.21 ± 0.05	2.7 ± 0.5	0.24 ± 0.06	3.2 ± 0.7	0.26 ± 0.06	3.6 ± 0.6#	0.31 ± 0.06#
Treated IH/Narc	6.2 ± 1.2*	0.38 ± 0.10*	3.3 ± 1.0	0.25 ± 0.07	7.2 ± 1.7*	0.53 ± 0.10*	5.3 ± 0.7*	0.40 ± 0.08*

Normalized values represent number of microsleeps per minute until sleep onset or end of MWT trial. *Patients in the treated IH/Narc group showed significantly (P < .05) higher microsleep frequency than the treated OSA group in MWT trials 1, 3, and 4. #Patients in the untreated OSA group showed significantly (P < .05) higher microsleep frequency than the treated OSA group in MWT trial 4. IH = idiopathic hypersomnia, MWT = Maintenance of Wakefulness Test, Narc = narcolepsy, OSA = obstructive sleep apnea.