Season of Birth, Sex and Sleep Timing Preferences

Yuee Huang, Dongdong Lin, Chuanwen Lu, Gholam Ali, James Metzger, Nivedita Shankar, Tan Xu, Wenjie Sun and Guangliang Shan
Additional contact information
Yuee Huang: Department of Preventive Medicine, School of Public Health, Wannan Medical College, Wuhu 241001, China
Dongdong Lin: School of Science and Engineering, Tulane University, New Orleans, LA 70112, USA
Chuanwen Lu: Department of Environmental Toxicology, The Institute of Environmental and Human Health, Texas Tech University, Texas Tech University Health Sciences Center, Lubbock, TX 79416, USA
Gholam Ali: School of Medicine, Tulane University, 1430 Tulane Ave, New Orleans, LA 70112, USA
James Metzger: Histecon Associates, Inc. Little Rock, AR 72205, USA
Nivedita Shankar: Saw Swee Hock School of Public Health, National University of Singapore, 117549, Singapore
Tan Xu: Department of Epidemiology, School of Public Health, Medical College of Soochow University, Suzhou 215123, China
Wenjie Sun: School of Food Science, Guangdong Pharmaceutical University, Zhongshan 528458, China
Guangliang Shan: Department of Epidemiology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Beijing 100005, China

IJERPH, 2015, vol. 12, issue 5, 1-11

Abstract: Objective : To evaluate whether the season of birth and sex are associated with preferences for bedtime among Chinese adults. Methods : A national population-based study on sleep preferences was conducted among Chinese in 2008. A questionnaire was used to collect information on the sleep time of Chinese adults. Analysis of covariance was used to examine the relationship between season of birth and preferences for bedtime. Two sets of potential confounders were used in the adjusted models. Model 1 adjusted for age. Model 2 additionally adjusted for area, occupation, education level, smoking, and drinking. Participants and Measurements : The questionnaire was administered to a sample of 3959 Chinese adults. Results : Men had a higher delayed mean sleep onset and offset time (22:38 and 6:32) than women (22:18 and 6:25). Men also slept for a shorter duration compared to women (7 h 54 min vs. 8 h 7 min). Women born in fall had the latest sleep onset time sleep offset time (22:23/6:30), compared to their counterparts born in winter. These associations were attenuated by additional adjustments of more confounders. Conclusions : There were significant differences in sleep timing preferences between men and women. Season of birth was not associated with sleep timing in Chinese adults.

Keywords: season of birth; sex; sleep timing (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2015
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