Seasonal Variation in Sleep, Respiratory, and Cardiovascular Parameters Assessed by a Wearable Device

< 0.001). Interaction models revealed that age modified seasonal effects on sleep efficiency and latency, with older adults showing greater winter-related sleep latency increases but smaller seasonal fluctuations in apnea indices. Sleep and respiratory parameters exhibit distinct seasonal modulation, with winter months associated with higher apnea burden and reduced oxygenation, and summer associated with prolonged sleep latency and greater fragmentation.