Associations Between Multidimensional Sleep Health Parameters and Adolescents' Self-reported Light Exposure in the...

Area of Science:

• Chronobiology
• Adolescent Sleep Medicine
• Environmental Health

Background:

• Adolescent sleep health is crucial for development and well-being.
• Light exposure, particularly from electronic devices, is increasingly recognized as a significant environmental factor influencing sleep patterns.
• Understanding the relationship between free-living light exposure and sleep dimensions is essential for public health.

Purpose of the Study:

• To investigate the associations between real-world light exposure and various aspects of sleep health in adolescents.
• To differentiate the effects of morning daylight and evening electronic device light exposure on sleep parameters.

Main Methods:

• Utilized actigraphy for objective sleep measurement over six consecutive nights in adolescents' homes.
• Collected subjective data through daily sleep logs, light exposure logs, and questionnaires on alertness and sleep satisfaction.
• Analyzed associations between self-reported light exposure variables and objectively measured sleep outcomes.

Main Results:

• Morning daylight exposure was linked to longer objectively measured sleep duration.
• Evening exposure to electronic devices correlated with later sleep onset/offset, shorter sleep duration, and increased sleep variability.
• No significant associations were found between self-reported light exposure and sleep satisfaction, alertness, or sleep efficiency.
• Circadian preference emerged as a significant covariate influencing sleep variance.

Conclusions:

• Adolescent sleep health is demonstrably associated with morning daylight and evening electronic device light exposure.
• Morning light may promote longer sleep duration, while evening screen time negatively impacts sleep timing and consistency.
• Environmental light management strategies could be beneficial for improving adolescent sleep health.