Caffeine Consumption and Sleep Quality in Australian Adults
Open accessAbstract
Caffeine is commonly consumed to help offset fatigue, however, it can have several negative effects on sleep quality and quantity. The aim of this study was to determine the relationship between caffeine consumption and sleep quality in adults using a newly validated caffeine food frequency questionnaire (C-FFQ). In this cross sectional study, 80 adults (M ± SD: 38.9 ± 19.3 years) attended the University of South Australia to complete a C-FFQ and the Pittsburgh Sleep Quality Index (PSQI). Caffeine consumption remained stable across age groups while the source of caffeine varied. Higher total caffeine consumption was associated with decreased time in bed, as an estimate of sleep time (r = −0.229, p = 0.041), but other PSQI variables were not. Participants who reported poor sleep (PSQI global score ≥ 5) consumed 192.1 ± 122.5 mg (M ± SD) of caffeine which was significantly more than those who reported good sleep quality (PSQI global score < 5; 125.2 ± 62.6 mg; p = 0.008). The C-FFQ was found to be a quick but detailed way to collect population based caffeine consumption data. The data suggests that shorter sleep is associated with greater caffeine consumption, and that consumption is greater in adults with reduced sleep quality.
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Teenagers who consumed large quantities of caffeine experienced interfered sleep.
“Perhaps not surprisingly, teenagers who consumed large quantities of caffeine experienced interfered sleep [99].”
From Effect of Caffeine Consumption on the Risk for Neurological and Psychiatric Disorders: Sex Differences in Human (2020) · cites this paper as [99]
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- Authors
- Watson, E., Coates, A., Kohler, M., & Banks, S.
- Affiliations
- University of South Australia (AU)
- Corresponding author
- Watson, Emily
- Venue
- Nutrients
- Publisher
- MDPI AG
- Published
- 2016-08-04
- Volume
- 8
- Issue
- 8
- Pages
- 479
- ISSN
- 2072-6643 (ISSN-L)
- PMC
- PMC4997392
- OpenAlex
- W2480130713
- Cited by
- 109
- References
- 28
- Citations by year
- 2026: 9 · 2025: 14 · 2024: 9 · 2023: 19 · 2022: 14 · 2021: 9 · 2020: 19 · 2019: 10 · 2018: 4 · 2017: 2
- FWCI
- 4.32
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Nutrients (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- UniSA Research Outputs Repository (University of South Australia) (submittedVersion, other-oa)
- Funders
- University of South Australia
- Topics
- Health Sciences › Medicine › Pharmacology › Coffee research and impacts
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
- Keywords
- caffeine consumption, sleep quality, sleep duration, Pittsburgh Sleep Quality Index, adults, caffeine sources, questionnaire validation
- MeSH terms
- Adult, Age Factors, Aged, Aged, 80 and over, Caffeine, Carbonated Beverages, Coffee, Cross-Sectional Studies, Feeding Behavior, Female, Humans, Sleep Initiation and Maintenance Disorders, Male, Middle Aged, Quality of Life, Severity of Illness Index, South Australia, Tea, Time Factors, Dyssomnias, Young Adult, Self Report
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