Table 2.

Diagnostic criteria and classification of OSA in adults.

Diagnostic criteria (ICSD-3) (A+ B) or C		Classification (AASM Task Force)26
A) Clinical. Presence of one or more of the following 1) Complaint of sleepiness, non-restorative sleep, fatigue or insomnia 2) Complaint of awakenings with sensation of breath holding, gasping or choking 3) Reports by observers of snoring or breathing interruptions 4) Diagnosis of hypertension, mood disorder, cognitive deficit, coronary artery disease, stroke, congestive heart failure, atrial fibrillation or diabetes mellitus type 2	B) Polysomnographic 1) Five or more predominantly obstructive respiratory events (obstructive or mixed apneas, hypopneas or RERA), per hour of sleep	A) Mild: ≥5 and <15 events/hour of sleep B) Moderate: ≥15 and <30 events/hour of sleep C) Severe: ≥30 events/hour of sleep
	C) Polysomnographic 1) Fifteen or more predominantly obstructive respiratory events (obstructive or mixed apneas, hypopneas or RERA), per hour of sleep

ICSD-3- International Classification of Sleep Disorders-Third Edition; AASM: American Academy of Sleep Medicine; RERA: respiratory effort related arousals.