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PAP therapy improves depressive symptoms in all patients with sleep apnea

DARIEN, IL Patients seen at the Cleveland Clinic Sleep Disorders Center who used positive airway pressure (PAP) to treat their obstructive sleep apnea (OSA) had improvements in their depressive symptoms, even if they followed the prescribed PAP regimen only partly, a new study reports.

The study looked at 779 patients with OSA and asked them to fill out a standardized PHQ-9 form to assess depressive symptoms, which patients with OSA often have, researchers said. They were assessed again with the PHQ-9 following PAP treatment, and all showed improvement in PHQ-9 scores; however, patients using their PAP devices more than four hours per night had greater score improvements than those who were less adherent. Other factors that affected the improvements in PHQ-9 scores were whether the patient was sleepy and marital status.

"The score improvements remained significant even after taking into account whether a patient had a prior diagnosis of depression or was taking an anti-depressant," said Charles Bae, MD, principal investigator in the study. "The improvements were greatest in sleepy, adherent patients but even non-adherent patients had better PHQ-9 scores. Another interesting finding was that among patients treated with PAP, married patients had a greater decrease in PHQ-9 scores compared to single or divorced patients."

OSA is a sleep-related breathing disorder that occurs when the tissue in the back of the throat collapses and blocks the airway, causing the body to stop breathing during sleep. OSA disrupts sleep and can increase the risk of other health problems such as heart disease and stroke. PAP therapy keeps the airway open with a stream of air. Continuous positive airway pressure (CPAP) is a form of PAP delivered through a mask worn over the nose or face and is the first-line treatment for OSA.

The Cleveland Clinic study is one of the largest to look at the effect of PAP therapy on depressive symptoms as measured by the PHQ-9, part of the Patient Health Questionnaire and a tool for assisting primary care clinicians in diagnosing depression. The abstract "Depressive symptoms improve in patients with sleep apnea who use positive airway pressure (PAP)" is being presented today at SLEEP 2012, the 26th annual meeting of the Associated Professional Sleep Societies (APSS) in Boston.


Contact: Doug Dusik
American Academy of Sleep Medicine

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