Caffeinated Drinks Intake, Late Chronotype, and Increased Body Mass Index among Medical Students in Chongqing, China: A Multiple Mediation Model

Yangchang Zhang, Yang Xiong, Jia Dong, Tingting Guo, Xiaoman Tang and Yong Zhao
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Yangchang Zhang: Department of Public Health and Management, Chongqing Medical University, Chongqing 400016, China
Yang Xiong: Department of the First Clinical Medicine, Chongqing Medical University, Chongqing 400016, China
Jia Dong: Department of the First Clinical Medicine, Chongqing Medical University, Chongqing 400016, China
Tingting Guo: Department of the First Clinical Medicine, Chongqing Medical University, Chongqing 400016, China
Xiaoman Tang: Department of the First Clinical Medicine, Chongqing Medical University, Chongqing 400016, China
Yong Zhao: Department of Public Health and Management, Chongqing Medical University, Chongqing 400016, China

IJERPH, 2018, vol. 15, issue 8, 1-12

Abstract: Background : This paper investigates the problems regarding caffeinated drinks intake, late chronotype, and increased body mass index (BMI) among medical students at a Chinese university. Methods : This cross-sectional study was conducted in 2018 with 616 medical students from Chongqing Medical University in Chongqing, China, whose information were collected by a self-reported questionnaire that included four sections: Demographic characteristics; Caffeinated drinks intake and physical state; Morningness-Eveningness Questionnaire; Depression Anxiety Stress Scale 21. Multiple mediation analyses were conducted to test the impact of late chronotype on increased BMI through caffeinated drinks consumption through two models. Results : The significantly mediated effect of caffeinated drinks consumption was revealed (estimate: −0.01, SE = 0.01, 95% CI [−0.02, −0.01]), and which played a positive role in linking late chronotype (B = −0.01, SE = 0.01, p < 0.001) and increased BMI (B = 1.37, SE = 0.21, p < 0.01), but their significant association did not be found in reversed model. In addition, physical activity and inactivity times demonstrated significant indirect effects in the two models. Conclusions : Interventions should focus on reducing caffeinated drinks intake and sedentary behavior time, enhancing physical activity among medical students.

Keywords: medical students; chronotype; obesity; caffeinated drinks (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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