AHI	apnea–hypopnea index
ANOVA	one-way analysis of variance
BMI	body mass index
CSF	cerebrospinal fluid
EDS	excessive daytime sleepiness
HLA	human leukocyte antigen
ICSD-2	the International Classification of Sleep Disorders, Second Edition
ICSD-3	the International Classification of Sleep Disorders, Third Edition
IH	idiopathic hypersomnia
LST	long sleep time
MRD	metabolic-syndrome-related disorder
MSLT	multiple sleep latency tests
nCPAP	nasal continuous positive airway pressure
NSD	narcolepsy spectrum disorder
NT1	narcolepsy type 1
NT2	narcolepsy type 2
NT2P	human leukocyte antigen DQB1*06:02 positive narcolepsy type 2
NT2N	human leukocyte antigen DQB1*06:02 negative narcolepsy type 2
OSA	obstructive sleep apnea
PSG	polysomnography
REM	rapid eye movement
SD	standard deviation