Periods when breathing stops completely are classified as apnea or apneic episodes. In OSA, the conventional flow of air is repeatedly stopped at night time.

OSA is most popular among older males, but it really can affect anyone, including children. The incidence rises following menopause, in a way that the rates resemble in men and postmenopausal women.

Snoring can often be associated with OSA, specifically if the snoring is interrupted by periods of silence. Snoring is a result of airflow squeezing with the narrowed airway space.