School of Nursing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
Appl Nurs Res. 2013 May;26(2):80-4. doi: 10.1016/j.apnr.2012.08.004. Epub 2012 Dec 4.
The aim of this study was to examine whether caffeine abstinence in the evening could improve the sleep quality of those who habitually consume coffee.
A double-blind control group design (caffeine and caffeine-free groups).
A university.
A convenience sampling of 10 students (mean age 21.4 years).
It was a 14-day experiment. For the first 7 days, all participants consumed caffeinated coffee. In the following 7 days, subjects consumed caffeinated or decaffeinated coffee according to their assigned group.
Sleep-wake parameters, self-reported sleep quality and level of refreshment.
There were no significant differences (p>.05) among the data of the two groups identified. No significant changes (p>.05) were found in the sleep quality of either group during the study.
This study confirms that caffeine abstinence in the evening might not be helpful in sleep promotion. It highlights the need to implement evidence-based practice in health promotion.
本研究旨在探讨夜间戒除咖啡因是否能改善习惯性喝咖啡者的睡眠质量。
双盲对照分组设计（咖啡因组和无咖啡因组）。
一所大学。
10 名学生（平均年龄 21.4 岁）的便利抽样。
这是一个为期 14 天的实验。在前 7 天，所有参与者都饮用含咖啡因的咖啡。在接下来的 7 天里，根据他们所属的组别，受试者饮用含咖啡因或脱咖啡因的咖啡。
睡眠-觉醒参数、自我报告的睡眠质量和清醒程度。
两组数据之间没有显著差异（p>.05）。在研究期间，两组的睡眠质量都没有明显变化（p>.05）。
本研究证实，夜间戒除咖啡因可能无助于促进睡眠。它强调了在健康促进中实施循证实践的必要性。
