The influence of intensity and timing of daily light exposure on subjective and objective sleep in adolescents with an evening circadian preference.

ABSTRACT:

Study objectives

The aim of the present study is to examine the relationship between light and sleep, in adolescents with an evening circadian preference.

Methods

For a period of seven days, ninety-nine adolescents wore a wrist actigraph to assess light exposure and objective sleep and completed a sleep diary to assess subjective sleep.

Results

Lower average light intensity across the preceding 24 h was associated with a later sleep onset (p < 0.01) and a later next-day sleep offset (p < 0.05). A later time of last exposure to more than 10 lux was associated with a later sleep onset (p < 0.001) and a shorter objective total sleep time (p < 0.001), as well as a later bedtime (p < 0.001) and a shorter subjective total sleep time (p < 0.001). Furthermore, exploratory ana

SUBMITTER: Gasperetti CE 

PROVIDER: S-EPMC7925365 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature