Cited by 14Coffee research and impactsSleep and related disordersSleep and Work-Related Fatigue

Does a single cup of coffee at dinner alter the sleep? a controlled cross-over randomised trial in real-life conditions

LLORET‐LINARES, Célia, LAFUENTE‐LAFUENTE, Carmello, CHASSANY, Olivier, GREEN, Andrew, DELCEY, Véronique, MOULY, Stéphane, BERGMANN, Jean François·2012·Nutrition & Dietetics

Abstract

Abstract Aim: To report changes in the quality of sleep after drinking an evening cup of either caffeinated or decaffeinated coffee, in healthy subjects in everyday life. Methods: Sixty‐three healthy men and women, who considered themselves to be caffeine sensitive were included in a double‐blind, cross‐over trial, randomised to receive either caffeinated coffee containing 90 mg of caffeine, or, as control, a dose of decaffeinated coffee containing 4.5 mg caffeine, taken after dinner. The primary outcome measure was the degree of sleep disturbance, scored on a visual analogue scale, ranging from 0 (excellent sleep) to 100 (very disturbed sleep). Ancillary criteria were patients' reported estimate of sleep latency, and how often the subjects reported waking. Results: Mean age of subjects was 30.5 ± 12 years. The quality of sleep was significantly worse with caffeinated (mean 30.8 ± 22.7) than with decaffeinated coffee (mean 19.5 ± 16.9), P = 0.001. Caffeinated coffee also significantly increased the sleep latency (mean difference 17 ± 31 minutes, P < 0.001) and the frequency of waking (mean 1.3 vs 0.8 episodes in the night, P = 0.006) compared with decaffeinated coffee. Conclusions: Even a single cup of caffeinated coffee consumed before bedtime in real‐life conditions causes a deterioration in the quality of sleep in caffeine‐sensitive subjects.

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Crossref · 10.1111/j.1747-0080.2012.01601.x

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  • Three high-risk studies did not implement a washout period, with conditions administered across consecutive nights.

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Authors
LLORET‐LINARES, C., LAFUENTE‐LAFUENTE, C., CHASSANY, O., GREEN, A., DELCEY, V., MOULY, S., & BERGMANN, J. F.
Affiliations
Assistance Publique – Hôpitaux de Paris (FR)
Venue
Nutrition & Dietetics
Publisher
Wiley
Published
2012-06-15
Volume
69
Issue
4
Pages
250-255
ISSN
  • 1446-6368 (ISSN-L)
  • 1747-0080
OpenAlex
W1502159292
Cited by
14
References
31
Citations by year
2025: 1 · 2024: 1 · 2023: 1 · 2021: 1 · 2020: 3 · 2019: 1 · 2018: 1 · 2016: 2 · 2014: 3
FWCI
0.70
Type
journal article
Language
en
Open access
closed
Locations
Nutrition & Dietetics (publishedVersion)
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
coffee, caffeine, sleep quality, sleep disorders, sleep latency, nocturnal awakenings, caffeine sensitivity, decaffeinated coffee, healthy adults

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