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  • Sleep apnea linked to...

Sleep apnea linked to increased risk of Parkinson's, but CPAP may reduce risk: Study

Dr. Kamal Kant KohliWritten by Dr. Kamal Kant Kohli Published On 2025-03-17T20:45:03+05:30  |  Updated On 18 March 2025 11:47 AM IST
Sleep apnea linked to increased risk of Parkinsons, but CPAP may reduce risk: Study
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People with obstructive sleep apnea have an increased risk of Parkinson's disease, but if started early enough, continuous positive airway pressure (CPAP) may reduce that risk, according to a preliminary study released today, March 2, 2025, that will be presented at the American Academy of Neurology’s 77th Annual Meeting taking place April 5–9, 2025, in San Diego and online. The study found using CPAP within two years of a sleep apnea diagnosis reduced the risk of Parkinson’s.

Obstructive sleep apnea is when throat muscles relax during sleep, blocking the airway, causing a person to wake up repeatedly to breathe. This disrupted sleep pattern can lower oxygen levels, affecting the brain. With CPAP, pressurized air is delivered through a mask to keep the airway open while a person sleeps.

“Obstructive sleep apnea is common and previous research has found when untreated, it is associated with an increased risk of heart attack and stroke,” said study author Gregory D. Scott, MD, PhD, of the VA Portland Health Care System in Oregon. “While our study found an increased risk of Parkinson’s disease, the good news is people can do something about it, by using CPAP as soon as they are diagnosed with the sleep disorder.”

For the study, researchers reviewed more than 20 years of medical records to identify nearly 1.6 million veterans who had obstructive sleep apnea and nearly 10 million veterans who did not.

Researchers then identified which participants developed Parkinson’s disease. Of those with sleep apnea, 5,284 people, or 3.4%, developed Parkinson’s disease within five years compared to 37,873 people, or 3.8% of those who did not have sleep apnea. However, Scott noted these initial proportions were potentially biased by differences in age, smoking, and overall survival between the group with sleep apnea and those who did not have sleep apnea.

Researchers looked at rates of Parkinson’s disease five years after a sleep apnea diagnosis. After adjusting for age, sex and health factors such as smoking, researchers found among people with sleep apnea, there were 1.8 more cases of Parkinson’s disease per 1,000 people compared to people without sleep apnea.

Of participants with sleep apnea, 10% had documented use of a CPAP machine. These participants were divided into two groups, those who received a CPAP machine within two years of their diagnosis and those who received one after two years.

Researchers found similar rates among people with sleep apnea who started CPAP after two years as those who did not use CPAP, with 9.5 and 9.0 cases of Parkinson’s disease per 1,000 people respectively. However, researchers found a lower rate of Parkinson’s among those who started CPAP early, within two years of diagnosis, with 2.3 fewer cases per 1,000 people when compared to people who did not use CPAP.

“It is encouraging to know that while obstructive sleep apnea may increase the risk of Parkinson’s disease, treating it right away with CPAP may reduce that risk,” said Scott. “Future studies are needed to follow people more closely after receiving a sleep apnea diagnosis and over longer periods of time.”

A limitation of the study was that while researchers could identify which people had a CPAP device, they were unable to tell if people used the treatment daily, as prescribed.The study was supported by the U.S. Veterans Administration and the U.S. Department of Defense.

American Academy of Neurologyobstructive sleep apneaParkinson’s diseaseSleep apneasleep disorder
Source : American Academy of Neurology
Dr. Kamal Kant Kohli
Dr. Kamal Kant Kohli

Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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