Recurrent periods of irrepressible need to sleep, lapsing into sleep, or napping within same day, for ≥3 months; ≥1 of: cataplexy (brief episodes of bilateral muscle tone loss) ≥few times/month; hypocretin deficiency (CSF hypocretin-1 ≤110 pg/mL); REM sleep latency ≤15 min on MSLT (or mean sleep latency ≤8 min with ≥2 sleep-onset REM periods)
Self-reported excessive sleepiness (hypersomnolence) despite main sleep period of ≥7 hrs; ≥1 of: recurrent lapses into sleep during same day; prolonged main sleep episode (>9 hrs) that is non-restorative; difficulty being fully awake after abrupt awakening
Evidence by polysomnography of ≥5 obstructive apnoeas/hypopnoeas per hour of sleep + ≥1 of: nocturnal breathing disturbances (snoring, snorting, gasping, breathing pauses); daytime sleepiness/fatigue/unrefreshing sleep not explained by another disorder; OR ≥15 obstructive apnoeas/hypopnoeas per hour of sleep regardless of accompanying symptoms