New Study Shows Sunrise’s AI-Powered Measure of Respiratory Effort, REMOV, Better Reflects OSA Symptoms Than Traditional PSG Metrics

NEW YORK--(BUSINESS WIRE)--Sunrise Group, a pioneer in medical device innovation and sleep care, today announced a new peer-reviewed study in Nature Communications Medicine. Sunrise developed the only home sleep test with respiratory effort measurement that has been validated against esophageal pressure, the reference standard. The study reveals that REMOV, the Sunrise-specific marker of respiratory effort burden in obstructive sleep apnea (OSA), outperforms traditional polysomnography (PSG) metrics in predicting patient-reported symptoms.

OSA is typically diagnosed and severity-graded using the apnea-hypopnea index (AHI), which counts breathing events per hour of sleep. However, symptom burden (fatigue, daytime sleepiness, depression) correlates sometimes only weakly with AHI, creating a gap between measured event frequency and patient experience. This disconnect can complicate clinical decision-making and may contribute to underdiagnosis, despite OSA affecting around 936 million adults worldwide.

The newly published study examines 1,000 adults referred for suspected OSA who underwent overnight PSG complemented by a Sunrise recording to measure REMOV, that captures the percentage of sleep time spent with increased respiratory effort, and symptom assessment using validated questionnaires. The study found that:

• Patient-reported symptoms are more strongly linked with REMOV than with other PSG metrics (including AHI), particularly among women.
• REMOV captures clinically relevant burdens in low-AHI patients, where symptom-AHI mismatch is frequent.
• REMOV values increase as AHI values increase, rising almost linearly at low AHI values (0 - 15 events/h), then flattening at higher AHI values (>30 events/h).

“Fatigue and sleepiness matter most to patients, yet symptom severity isn't always reflected by high AHI values,” said Laurent Martinot, co-founder and CEO of Sunrise Group. “REMOV offers an accurate view of respiratory effort, helping clinicians understand what’s driving symptoms and identify patients who may be overlooked by AHI-centric assessment. By capturing what AHI can miss, we also realize the true burden of OSA is likely bigger than we thought, and we can help more people get the care they need.”

This new study further validates Sunrise Group’s approach to diagnosing sleep apnea, especially in patients with mild OSA, and in women. By shifting the focus from merely counting breathing events to the larger picture of patient burden, Sunrise is positioned to help clinicians understand the disease impacts better than they can using traditional methods.

About Sunrise Group

Founded in 2015, Sunrise Group® is a pioneer in medical device innovation and sleep care. The company first developed an FDA-cleared and CE-marked medical device – a lightweight, chin-worn sensor for at-home sleep apnea diagnosis using AI-supported analysis of mandibular jaw movements – that has been validated in peer-reviewed studies and endorsed by leading sleep experts. Today, Sunrise builds on that breakthrough to develop advanced software and hardware to detect, monitor, and treat sleep disorders, and brings this expertise to Dreem Health®, the U.S.-based virtual sleep clinic, available in all 50 states and covered by major insurers. Headquartered in Belgium with offices in France and the United States, the team brings together leaders in sleep research, patient care, and medical technology. To learn more about Sunrise and Dreem Health, visit us.hellosunrise.com and dreemhealth.com.