Association between behavioral jet lag with subjective and objective circadian rhythm among Chinese young adults

The mean age of participants was 20.7 years, with those in medium and high behavioral jet lag groups showing significant circadian disruption.

• Medium and high behavioral jet lag groups had lower scores on the Morningness-Eveningness Questionnaire (rMEQ) and later dim light melatonin onset (DLMO) times compared to the low behavioral jet lag group.
• Each hour increase in social jet lag was associated with a 2.27 point decrease in rMEQ score and a 24-minute delay in DLMO time.
• Each hour increase in eating jet lag was associated with a 1.71 point decrease in rMEQ score and a 28-minute delay in DLMO time.
• Total jet lag increases of one hour were associated with a 1.08 point decrease in rMEQ score and a 17-minute delay in DLMO time.
• Social jet lag explained a greater variance in DLMO timing (6.7%) compared to eating jet lag (4.2%).

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