. Author manuscript; available in PMC: 2008 Jun 1.

Published in final edited form as: Sleep Med. 2007 Apr 30;8(4):373–399. doi: 10.1016/j.sleep.2007.03.008

Table 1.

Clinical characteristics of narcolepsy-cataplexy, narcolepsy without cataplexy and idiopathic hypersomnia

	Daytime sleepiness		Other symptoms	MSLT		HLADQB1*0602 positivity	Low CSF hypocretin levels (<110 pg/ml)
	Duration	Awaken-refreshed		Sleep latency	SOREMPS
Narcolepsy-cataplexy	short (< 30 minutes)	(+)	Cataplexy REM sleep-related symptoms	<8 min^*	≥ 2	>90%	85-90% >90% in HLA positive
Narcolepsy without cataplexy	short (< 30 minutes)	(+)	Cataplexy (−) REM sleep-related symptoms	<8 min^*	≥ 2	40-50%	10-20% (almost all HLA positive)
Idiopathic hypersomnia with long sleep time	long (> 30 minutes)	(−)	Cataplexy (−) prolonged nighttime sleep (>10hrs) autonomic nervous dysfunction	<8 min^*	≤1	no consistent results	normal
Idiopathic hypersomnia without long sleep time	varied	(−)	Cataplexy (−) no prolonged nighttime sleep (<10hrs) autonomic nervous dysfunction	<8 min^*	≤1	no consistent results	normal

Less than 8 minutes is considered for both narcolepsy and idiopathic hypersomnia in the 2nd revision of ICSD.