Journal of
Public Health and Epidemiology

  • Abbreviation: J. Public Health Epidemiol.
  • Language: English
  • ISSN: 2141-2316
  • DOI: 10.5897/JPHE
  • Start Year: 2009
  • Published Articles: 469

Full Length Research Paper

Daytime sleepiness, circadian preference, caffeine consumption and use of other stimulants among Thai college students

Jason Tran
  • Jason Tran
  • Department of Epidemiology, Multidisciplinary Health International Research Training Program, Harvard School of Public Health, Boston, MA, U.S.A.
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Somrat Lertmaharit
  • Somrat Lertmaharit
  • College of Public Health Sciences, Chulalongkorn University, Bangkok, Thailand.
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Vitool Lohsoonthorn
  • Vitool Lohsoonthorn
  • Department of Preventive and Social Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
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Wipawan C. Pensuksan
  • Wipawan C. Pensuksan
  • School of Nursing, Walailak University, Nakhon Si Thammarat, Thailand.
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Thanapoom Rattananupong
  • Thanapoom Rattananupong
  • Department of Preventive and Social Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
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Mahlet G. Tadesse
  • Mahlet G. Tadesse
  • Department of Mathematics & Statistics, Georgetown University, Washington, DC, U.S.A.
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Bizu Gelaye*
  • Bizu Gelaye*
  • Department of Epidemiology, Multidisciplinary Health International Research Training Program, Harvard School of Public Health, Boston, MA, U.S.A.
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Michelle A. Williams
  • Michelle A. Williams
  • Department of Epidemiology, Multidisciplinary Health International Research Training Program, Harvard School of Public Health, Boston, MA, U.S.A.
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  •  Received: 21 January 2014
  •  Accepted: 16 May 2014
  •  Published: 30 June 2014

Abstract

This study was conducted to evaluate the prevalence of daytime sleepiness and evening chronotype and to assess the extent to which both are associated with the use of caffeinated stimulants among 3,000 Thai college students. Demographic and behavioral characteristics were collected using a self-administered questionnaire. The Epworth Sleepiness Scale and the Horne and OstbergMorningness-Eveningness Questionnaire were used to evaluate prevalence of daytime sleepiness and circadian preference. Multivariable logistic regression models were used to evaluate the association between sleep habits and consumption of caffeinated beverages. Overall, the prevalence of daytime sleepiness was 27.9% (95% CI: 26.2 to 29.5%) while the prevalence of evening chronotype was 13.0% (95% CI: 11.8 to 14.2%). Students who use energy drinks were more likely to be evening types. For instance, the use of M100/M150 energy drinks was associated with a more than 3-fold increased odds of evening chronotype (OR 3.50; 95% CI 1.90 to 6.44), while Red Bull users were more than twice as likely to have evening chronotype (OR 2.39; 95% CI 1.02 to 5.58). Additionally, those who consumed any energy drinks were more likely to be daytime sleepers. For example, Red Bull (OR 1.72; 95% CI 1.08 to 2.75) or M100/M150 (OR 1.52; 95% CI 1.10 to 2.11) consumption was associated with increased odds of daytime sleepiness. Our findings emphasize the importance of implementing educational and prevention programs targeted toward improving sleep hygiene and reducing the consumption of energy drinks among young adults.

Key words: Daytime sleepiness, Caffeine, stimulants, college students, morningness-eveningness.