Recent research presented at the American Thoracic Society meeting highlights a concerning link between rising temperatures and the prevalence of obstructive sleep apnea (OSA). As climate change continues to contribute to increased heat, the study indicates that the incidence and severity of OSA may rise significantly, potentially impacting human health on a broad scale.
Lead researcher Bastien Lechat, from Flinders Health and Medicine Research Institute in South Australia, reported that their analysis included data from over 125,000 users of an under-mattress apnea sensor across 41 countries. This device tracks various sleep metrics by monitoring changes in air pressure. The findings showed a significant correlation between higher ambient temperatures and an increased likelihood of experiencing apnea episodes. Specifically, in 29 countries studied, there was a 45% increase in the risk of having at least one apnea episode on warmer nights.
The researchers estimate that the rise in OSA cases due to heat could lead to a loss of over 785,000 healthy life years in 2023 alone, translating to an estimated economic cost of $32 billion in reduced workplace productivity. The study suggests that as global temperatures rise—projected to increase by 2°C over pre-industrial levels—OSA prevalence could increase by 1.5 to 3 times by 2100.
While the exact mechanisms connecting heat to OSA remain unclear, potential factors include disrupted sleep quality and decreased use of CPAP devices during warmer nights. Lechat emphasizes the critical role sleep plays in overall health, underscoring the broader implications of the findings in the context of climate change and public health.