A recent study published in Health Data Science has revealed significant associations between sleep characteristics and a wide range of diseases, based on data from 88,461 adults in the UK Biobank. Conducted by researchers from Peking University and Army Medical University, the study emphasizes the importance of sleep regularity—such as consistent bedtimes and stable circadian rhythms—as critical factors influencing disease risk.
Utilizing actigraphy data collected over an average period of 6.8 years, the study found that 92 diseases had over 20% of their risk attributed to poor sleep behavior. For instance, individuals with irregular bedtimes (specifically those going to bed after 00:30) exhibited a 2.57-fold increased risk of developing liver cirrhosis. Similarly, low interdaily stability, a measure of circadian rhythm consistency, was associated with a 2.61-fold heightened risk of gangrene.
The findings also challenge previous assertions that prolonged sleep (defined as nine hours or more) is detrimental to health. While many subjective reports have linked long sleep to conditions such as stroke and heart disease, this study found such associations in only one disease when examining objective data. Notably, it was revealed that a substantial portion (21.67%) of those classified as “long sleepers” were actually getting less than six hours of sleep, indicating a potential misclassification of sleep duration.
Professor Shengfeng Wang, the senior author, emphasized the need to expand our understanding of healthy sleep to include factors beyond mere duration. The research also confirmed similar associations within U.S. populations and suggested inflammatory pathways as a potential biological explanation. Future studies are anticipated to investigate causality and evaluate the effects of sleep interventions on chronic disease outcomes.
