The impact of active and former smoking on the severity of obstructive sleep apnea.

Purpose: Although obstructive sleep apnea (OSA) syndrome is a common disorder; the connection between OSA and smoking habits is still controversial. In this study, we investigated whether active smoking and pack × years of smoking have an impact on the severity of the disease regarding the patients with OSA.

Methods: This study included 964 patients referred to the Sleep Disorders Clinic between 01.