文章基本信息

标题：Intra-Individual Variability in Sleep Quality Among Coffee Consumers: A Cross-Sectional Study
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作者：Sowmya Ramakrishnappa ; Deepa Anbazhagan ; Verasingam Kumarasamy 等
期刊名称：Pakistan Journal of Nutrition
印刷版ISSN：1680-5194
电子版ISSN：1994-7984
出版年度：2020
卷号：19
期号：3
页码：146-152
DOI：10.3923/pjn.2020.146.152
出版社：Asian Network for Scientific Information
摘要：Background and Objective: Coffee is one of the most popular beverages in the world. Caffeine contained in coffee is a stimulant that acts on adenosine receptors to prevent sleepiness and promote alertness. In this study, we investigated the effect of coffee consumption on sleep quality of undergraduate students studying medicine. Materials and Methods: A cross-sectional study and convenient sampling method was used. A total of 350 students were enrolled and data were collected via a self-administered questionnaire based on the validated Pittsburgh Sleep Quality Index (PSQI) questionnaire. Results: The majority of students (73.1%) in this study consumed coffee, with instant coffee being the most preferred type. Coffee consumption was most frequent after 8 pm and the most common volume consumed daily was between 251 and 500 mL. The volume of coffee consumed daily was related to sleep quality. Conclusion: Although, coffee consumption had a non-significant impact on the quality of sleep among the total study population, we observed a large degree of intra-individual variability in the effects of caffeine.
关键词：Coffee; sleep quality; depression; insomnia; medical students