Social jetlag, a misalignment of biological and social time, and health effect assosiation in Japanese working population

2014 Fiscal Year Final Research Report

• Project/Area Number: 25870191
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Hygiene and public health; Epidemiology and preventive medicine
• Research Institution: The University of Tokyo
• Principal Investigator: KURODA Reiko 東京大学, 環境安全本部, 助教 (50553111)
• Research Collaborator: OKUBO Yasushi 東京大学, 環境安全本部, 教授
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: Social jetlag / 社会的時差ボケ / 睡眠 / 健康影響 / 朝型夜型 / Chronotype / 抑うつ / 時間生物学

Outline of Final Research Achievements

This study aimed to examine the association between health effects and spcial jetlag, a misalignment of biological and social time, in occupational setting.
First, we examined the reliability by test-retest in 113 subject and the validity in 47 subjects by comparing actigraphy for 7days.A highly statistical positive correlation was observed in the both of test-retest and validity.Second,Logistic regression analysis was performed to determine the odds ratio for each health effect for each category of social jetlag (<30, 30-149, 150<= min with adjustments for age, sex, mean sleep duration, job position, time or overwork, body mass index (except for obescity), chronotype, and smoking status .In a Japanese working population, there was a suggestion of U-shaped relationship between social jeltga and prevalence of Diabetes, Hyperlipidemia, Hyperuricemia, and obescity (BMI over 30). Depression is tended to increase with increasing social jetlag.

Free Research Field

産業保健