Department of Public Health and Management, Chongqing Medical University, Chongqing 400016, China.
Department of Nursing, Chongqing Medical University, Chongqing 400016, China.
Int J Environ Res Public Health. 2018 Aug 10;15(8):1721. doi: 10.3390/ijerph15081721.
: This paper investigates the problems regarding caffeinated drinks intake, late chronotype, and increased body mass index (BMI) among medical students at a Chinese university. : 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. : 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, < 0.001) and increased BMI (B = 1.37, SE = 0.21, < 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. : Interventions should focus on reducing caffeinated drinks intake and sedentary behavior time, enhancing physical activity among medical students.
这篇论文研究了中国某大学医学生摄入含咖啡因饮料、晚型作息和体重指数（BMI）增加的问题。
本横断面研究于 2018 年在中国重庆医科大学对 616 名医学生进行，通过一份自我报告问卷收集信息，问卷包括四个部分：人口统计学特征；含咖啡因饮料摄入和身体状况；Morningness-Eveningness Questionnaire；抑郁焦虑压力量表 21。采用两个模型进行多重中介分析，以检验晚型作息通过含咖啡因饮料摄入对 BMI 增加的影响。
研究揭示了含咖啡因饮料摄入的显著中介效应（估计值：-0.01，SE = 0.01，95%置信区间[-0.02，-0.01]），并且在将晚型作息（B = -0.01，SE = 0.01， < 0.001）和 BMI 增加（B = 1.37，SE = 0.21， < 0.01）联系起来方面发挥了积极作用，但在反向模型中未发现其显著相关性。此外，两个模型中的身体活动和不活动时间均表现出显著的间接效应。
干预措施应侧重于减少医学生摄入含咖啡因饮料和久坐行为时间，增加身体活动。
