Table 2.

DSM-V Time Criteria for Sleep and Circadian Rhythm Disorders.

Sleep or Circadian Disorder	Time Criteria
Insomnia	Episodic: >1 month and <3 months; Persistent: >3 months; Recurrent: >2 episodes within the space of 1 year
Hypersomnolence Disorder	Acute: <1 month; Subacute: 1–3 months; Persistent: >3 months
Narcolepsy	3 episodes/week over 3 months
Obstructive Sleep Apnea Hypopnea	5 obstructive apneas/hour of sleep
Central Sleep Apnea	5 central apneas/hour of sleep
Sleep-related Hypoventilation	No time criteria
Circadian Rhythm Sleep-Wake Disorders (6 subtypes–Delayed Sleep Phase type, Advanced Sleep Phase type, Irregular Sleep-Wake type, Non-24-h Sleep-Wake type, Shift Work type, and Unspecified type)	Episodic: >1 month and <3 months; Persistent: >3 months; Recurrent: >2 episodes within the space of 1 year