Cited by 27Coffee research and impactsCircadian rhythm and melatoninSleep and related disorders

Lifetime coffee consumption, pineal gland volume, and sleep quality in late life

Open access
Park, Jeongbin, Han, Ji Won, Lee, Ju Ri, Byun, Seonjeong, Suh, Seung Wan, Kim, Tae, Yoon, In Young, Kim, Ki Woong·2018·SLEEP

Abstract

Study Objectives: Previous studies have shown that coffee consumption may suppress the production of melatonin in pinealocytes through competitive inhibition of adenosine A2 receptors by caffeine. We investigated the impact of lifetime coffee consumption on pineal gland volume and the resulting effects on sleep quality. Methods: We enrolled 162 cognitively normal elderly individuals among the participants in the Korean Longitudinal Study on Cognitive Aging and Dementia. We evaluated the patterns and amounts of coffee consumption using a study-specific standardized interview and assessed sleep quality using the Pittsburgh Sleep Quality Index. We measured the volume of pineal parenchyma (VPP) by manually segmenting the pineal gland on high-resolution three-dimensional T1-weighted magnetic resonance images. We examined the impact of lifetime coffee consumption on the VPP and the resulting effects on sleep quality using analysis of covariance, multiple linear regression, and mediation analyses. Results: We found that smaller VPP was associated with higher cumulative lifetime coffee consumption. Participants who consumed more than 60 cup-years of coffee had VPPs that were smaller by about 20% than individuals who consumed less than 60 cup-years of coffee. The VPP mediated the association between lifetime coffee consumption and sleep efficiency and quality. Conclusions: Our findings suggest that high lifetime coffee consumption may reduce VPP, and that this reduction in VPP may impair the quality of sleep in late life.

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Crossref · 10.1093/sleep/zsy127

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Authors
Park, J., Han, J. W., Lee, J. R., Byun, S., Suh, S. W., Kim, T., Yoon, I. Y., & Kim, K. W.
Affiliations
  • Seoul National University (KR)
  • Gwangju Institute of Science and Technology (KR)
Corresponding author
Kim, Ki Woong
Venue
SLEEP
Published
2018-07-14
Volume
41
Issue
10
ISSN
  • 0161-8105 (ISSN-L)
  • 1550-9109
OpenAlex
W2884212434
Cited by
27
References
70
Citations by year
2026: 1 · 2025: 7 · 2024: 4 · 2023: 2 · 2022: 3 · 2021: 4 · 2020: 4 · 2019: 1 · 2018: 1
FWCI
1.61
Type
journal article
Language
en
Open access
Locations
  • SLEEP (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • Korean Health Technology
  • Ministry of Health, Welfare, Republic of Korea (HI09C1379 [A092077])
Topics
  • Health Sciences › Medicine › Pharmacology › Coffee research and impacts
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
Keywords
coffee consumption, pineal gland volume, sleep quality, melatonin, caffeine, adenosine A2 receptor, sleep efficiency, older adults, cognitive aging, mediation
MeSH terms
Aged, Aged, 80 and over, Caffeine, Coffee, Cognition, Dementia, Female, Humans, Longitudinal Studies, Male, Melatonin, Middle Aged, Pineal Gland, Sleep, Linear Models, Imaging, Three-Dimensional

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