Increased altitudes change sleep status among Chinese population

Area of Science:

• Environmental Health
• Sleep Science
• Sociology

Background:

• Sleep is crucial for overall health and well-being.
• Altitude is increasingly recognized as a factor influencing physiological processes, including sleep.
• Limited research exists on the specific trajectories of sleep status across varying altitudes.

Purpose of the Study:

• To investigate the relationship between altitude and sleep status.
• To analyze sleep duration patterns in relation to different altitude levels.
• To identify factors influencing sleep changes at high altitudes.

Main Methods:

• Utilized data from the China Health and Retirement Longitudinal Survey (CHARLS).
• Employed generalized additive models (GAM) and generalized additive mixed-effects models (GAMM).
• Controlled for confounding variables such as age, gender, education, residence, and ethnicity.

Main Results:

• Sleep duration exhibited a marked increase above 1600m altitude.
• Higher altitudes were significantly associated with a greater probability of long sleep duration (P=0.004).
• No significant association was found between altitude and short sleep duration (P=0.193).
• Gender, residence, and ethnicity were key factors in the altitude-sleep duration relationship.

Conclusions:

• High-altitude environments demonstrably affect sleep status, particularly sleep duration.
• Individuals residing at higher altitudes tend to experience longer sleep durations.
• Findings provide a basis for further research into the mechanisms linking altitude and sleep.