Early CPAP May Cut Parkinson's Risk by 30%, Study Finds

There's a powerful new reason to keep wearing your CPAP — and to start sooner rather than later. A large study of nearly 14 million US veterans has found that untreated obstructive sleep apnea (OSA) is linked to roughly double the risk of developing Parkinson's disease, and that beginning CPAP therapy within the first two years of diagnosis appears to cut that added risk by about 30%. The message for anyone newly diagnosed is blunt: the mask isn't just about feeling rested — it may help protect your brain.

What happened

The research, featured on the American Academy of Sleep Medicine's Talking Sleep podcast and reported by Neurology Advisor, was led by Dr Lee Neilson, a neurologist at Oregon Health & Science University and the Oregon VA. His team analysed records from 13,737,081 US veterans collected between 1999 and 2022. Of those, just over 1.5 million had obstructive sleep apnea; the average age was 60.5 years.

Two findings stand out:

People with untreated OSA had twice the risk of developing Parkinson's disease compared with those without sleep apnea.
Among those who started CPAP within two years of their OSA diagnosis, the added Parkinson's risk fell by approximately 30%.

In Dr Neilson's words: "We were pleasantly surprised to see that getting CPAP within the first two years of a sleep apnea diagnosis reduced the risk of Parkinson's disease by about 30%."

Why it matters

For a long time, the case for CPAP has centred on the immediate wins — more energy, sharper focus, lower blood pressure, fewer dangerous pauses in breathing overnight. This study points to something further down the road: the possibility that treating sleep apnea early is also a form of long-term brain protection.

The detail that matters most here is timing. The benefit was tied to starting therapy within two years of diagnosis — which reframes the all-too-common pattern of getting diagnosed, trying CPAP for a week, finding it awkward, and drifting away from it. This research suggests those early years are exactly when sticking with treatment may count the most.

It's worth being clear-eyed, too: this is observational research, it can't prove cause and effect on its own, and it was conducted in a largely older, male veteran population. But the size of the dataset — nearly 14 million people — makes the signal hard to ignore.

What this means for you

If you're an Australian living with sleep apnea, here's how to put this to work:

If you've just been diagnosed, don't wait. The window that mattered most in this study was the first two years. Getting set up with a machine and a comfortable mask early may pay dividends well beyond a good night's sleep.
If you've fallen off CPAP, this is your nudge to restart. Mask discomfort, pressure that feels too strong, a dry throat — these are common and usually fixable with the right mask fit or humidification. The hard part is often just getting comfortable again.
Consistency beats perfection. The protective signal here comes from actually using therapy, night after night — not from owning a machine that sits in the cupboard.
Talk to your sleep physician about your numbers and your adherence. Small adjustments often make the difference between giving up and settling in.

"We were pleasantly surprised to see that getting CPAP within the first two years of a sleep apnea diagnosis reduced the risk of Parkinson's disease by about 30%." — Dr Lee Neilson, Oregon Health & Science University

The bottom line

We already knew CPAP helps you feel better tomorrow. This study raises the stakes by suggesting it may also help shape your health years from now — if you start early and stick with it. If your mask has been gathering dust, or if you've just been diagnosed and are weighing your options, take it as encouragement: the sooner you commit to therapy, the more your future self may thank you. Need help finding a mask you'll actually want to wear? That's exactly the part we can help with.

Sources:
https://www.neurologyadvisor.com/reports/osa-parkinson-disease-risk-cpap-use-onset/
https://www.medicalnewstoday.com/articles/untreated-sleep-apnea-may-double-risk-parkinsons-cpap
https://www.aan.com/PressRoom/home/PressRelease/5239