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Chulalongkorn Medical Journal

Abstract

Background: Heavy caffeine consumption is the cause of caffeine addiction that might affect sleep quality and mental health. However, people, especially employees in various companies, may want to gain daily energy for efficient work and productivity by drinking high number of caffeinated beverages such as coffee.

Objectives: To explore coffee consumption, mental health, sleep quality, and factors related to caffeine addiction among employees.

Methods: A total of 321 employees at a company in Bangkok were asked about their demographics, coffee consumption and caffeine addiction by using newly developed instruments, namely Caffeine Addiction Questionnaire. Depression and sleep quality were assessed by using the Patient Health Questionnaire (PHQ-9) and the Pittsburgh Sleep Quality Index (PSQI), respectively. Factors related to caffeine addiction with P < 0.05 were considered as statistically significant.

Results: Of 321 samples, all (100.0%) were coffee drinkers and 248 (77.3%) had caffeine addiction. Most of employees (55.4%) had no depression and 29.9%, 13.4% and 1.3% of the samples had mild, moderate and high levels of depression, respectively. In addition, 302 (94.1%) had poor sleep quality. Female coffee drinkers were more likely to have caffeine addiction than male drinkers. Employees who consumed brewed coffee, cappuccino and more frequent or higher amount of coffee (i.e., 4 - 7 days/week, 2 - 4 cup/day) and reporting reasons for coffee drinking as a habit or to be awaked were more likely to have caffeine addiction. Having depression and poor sleep quality were associated with caffeine addiction.

Conclusion: Employees who drink coffee at a higher amount or frequency tend to have caffeine addiction which might relate to their sleep quality and mental health. Therefore, factors related to caffeine addiction should be avoided in order to improve mental health and sleep quality which are important to the work performance.

DOI

10.56808/2673-060X.5433

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