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Obstructive sleep apnea (OSA) affects roughly 40% of people with severe mental illness — but it's frequently missed because its symptoms look a lot like psychiatric ones. A large meta-analysis found OSA prevalence was similar across schizophrenia, major depressive disorder, and bipolar disorder. Experts say clinicians need to stop assuming fatigue and poor sleep are purely psychiatric and start asking: is this patient breathing normally at night?
Obstructive sleep apnea (OSA) is hiding in plain sight among patients with severe mental illness (SMI) — and a major new meta-analysis is calling on psychiatrists to start looking for it. Researchers analyzed 55 studies covering over 10,000 patients and found that OSA affects about 41% of people with SMI, with similar rates across schizophrenia (38.3%), major depressive disorder (38.2%), and bipolar disorder (35.6%). The study was published in Acta Psychiatrica Scandinavica.
The core problem? OSA symptoms — fatigue, daytime sleepiness, poor concentration, irritability — overlap heavily with psychiatric symptoms and medication side effects, making it easy to miss. Clinicians often chalk up daytime drowsiness to antipsychotics or mood stabilizers, while snoring and nighttime breathing pauses go unnoticed. An accompanying editorial from Stanford's Dr. Seiji Nishino urges clinicians not to rule out OSA based on BMI alone, and to use screening tools like STOP-Bang or the Epworth Sleepiness Scale to flag patients for further evaluation.
Key Takeaways:
Why it matters: Untreated OSA raises the risk of hypertension, cardiovascular disease, diabetes, and cognitive decline — conditions already elevated in people with SMI. Catching and treating OSA in this population could meaningfully improve both physical and mental health outcomes.
