A major new study presented at the ATS 2025 International Conference has found that climate change and sleep apnea are more closely linked than previously believed. Specifically, the study revealed that rising temperatures significantly increase the severity of obstructive sleep apnea (OSA). The findings point to a growing global health concern, especially as climate change continues to impact ambient conditions worldwide.
Increased OSA severity linked to temperature rise
The research identified a strong relationship between obstructive sleep apnea and temperature variations. Researchers analyzed data from over 116,000 users of an under-mattress sensor designed to estimate OSA severity. Each participant contributed around 500 nights of data, which was then evaluated against 24-hour ambient temperatures sourced from climate models.
Findings revealed that higher ambient temperatures were associated with a 45% increased likelihood of experiencing obstructive sleep apnea on any given night. The connection between climate change and sleep apnea was particularly pronounced in European regions, where the severity of the condition rose more sharply than in Australia or the United States. According to the study, this marked variation across regions underscores the complex relationship between obstructive sleep apnea and temperature.
Dr. Bastien Lechat, a senior research fellow at FHMRI: Sleep Health at Flinders University, noted, “We were surprised by the magnitude of the association between ambient temperature and OSA severity.” He emphasized the importance of limiting global warming to mitigate the health implications linked to rising temperatures.
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Societal and economic impact of rising OSA burden
Beyond the direct health implications, the study also examined the broader societal burden associated with climate change and sleep apnea. Using disability-adjusted life years, productivity losses, and health economics modeling, the researchers projected a twofold increase in OSA burden across most countries over the next 75 years if current climate trends persist.
The study further estimated that climate change has already contributed to a 50% to 100% increase in the burden of obstructive sleep apnea since the year 2000. Projections indicate that if global temperatures rise by 2 degrees Celsius or more, the OSA burden could rise by 1.5 to 3 times by the year 2100. These statistics reinforce the deepening link between obstructive sleep apnea and temperature, making it a pressing global health concern.
Dr. Lechat highlighted that the high prevalence of undiagnosed and untreated OSA worsens the situation. “Higher rates of diagnosis and treatment are likely to reduce the health and productivity burden due to rising temperature and increased OSA prevalence,” he added.
Urgent need for health policy interventions
This landmark study underscores the growing importance of addressing climate change and sleep apnea together in public health discussions. As ambient temperatures continue to rise, so does the urgency to understand and manage the link between obstructive sleep apnea and temperature. The findings stress the immediate need for national and international health policies to curb the escalating effects of climate change on human well-being.
The evidence now clearly shows that climate change and sleep apnea are interconnected in ways that pose significant challenges for health systems globally. Focused strategies must be implemented to alleviate the burden of OSA as both its prevalence and severity are expected to rise with global temperatures.
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