Cited by 376Coffee research and impactsBlood Pressure and Hypertension StudiesSodium Intake and Health

Blood pressure response to chronic intake of coffee and caffeine: a meta‐analysis of randomized controlled trials

Open access
Noordzij, Marlies, Uiterwaal, Cuno SPM, Arends, Lidia R, Kok, Frans J, Grobbee, Diederick E, Geleijnse, Johanna M·2005·Journal of Hypertension

Abstract

PURPOSE: Coffee is a widely consumed beverage and small health effects of substances in coffee may have large public health consequences. It has been suggested that caffeine in coffee increases the risk of hypertension. We performed a meta-analysis of randomized controlled trials of coffee or caffeine and blood pressure (BP). DATA IDENTIFICATION: BP trials of coffee or caffeine published between January 1966 and January 2003 were identified through literature databases and manual search. STUDY SELECTION: A total of 16 studies with a randomized, controlled design and at least 7 days of intervention was selected, comprising 25 strata and 1010 subjects. DATA EXTRACTION: Two persons independently obtained data on sample size, type and duration of intervention, changes in BP and heart rate (HR), and subjects' characteristics for each trial. Meta-analysis was performed using a random-effects model. RESULTS: A significant rise of 2.04 mmHg [95% confidence interval (CI), 1.10-2.99] in systolic BP and 0.73 mmHg (95% CI, 0.14-1.31) in diastolic BP was found after pooling of coffee and caffeine trials. When coffee trials (n = 18, median intake: 725 ml/day) and caffeine trials (n = 7, median dose: 410 mg/day) were analysed separately, BP elevations appeared to be larger for caffeine [systolic: 4.16 mmHg (2.13-6.20); diastolic: 2.41 mmHg (0.98-3.84)] than for coffee [systolic: 1.22 mmHg (0.52-1.92) and diastolic: 0.49 mmHg (-0.06-1.04)]. Effects on HR were negligible. CONCLUSIONS: Regular caffeine intake increases BP. When ingested through coffee, however, the blood pressure effect of caffeine is small.

Integrity signals

Registry

Crossref · 10.1097/01.hjh.0000166828.94699.1d

Cites

36 of 36 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

The text we found for this paper looks like another document, so its claims and self-check weren’t run. The registry and citation checks still apply.

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The text we found for this paper looks like another document, so the self-check wasn’t run.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Noordzij, M., Uiterwaal, C. S., Arends, L. R., Kok, F. J., Grobbee, D. E., & Geleijnse, J. M.
Affiliations
  • Utrecht University (NL)
  • Erasmus University Rotterdam (NL)
  • Wageningen University & Research (NL)
Corresponding author
Geleijnse, Johanna M
Venue
Journal of Hypertension
Published
2005-05
Volume
23
Issue
5
Pages
921-928
ISSN
0263-6352 (ISSN-L)
OpenAlex
W2091257623
Cited by
376
References
35
Citations by year
2026: 9 · 2025: 7 · 2024: 12 · 2023: 22 · 2022: 13 · 2021: 11 · 2020: 18 · 2019: 14 · 2018: 16 · 2017: 14 · 2016: 20 · 2015: 21 · 2014: 20 · 2013: 22 · 2012: 30
FWCI
2.76
Type
journal article
Language
en
Open access
Locations
  • Journal of Hypertension (publishedVersion)
  • PubMed (publishedVersion)
  • EUR Research Repository (Erasmus University Rotterdam) (publishedVersion)
  • Socio-Environmental Systems Modeling (acceptedVersion)
  • EUR Research Repository (Erasmus University Rotterdam) (submittedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
Topics
  • Health Sciences › Medicine › Pharmacology › Coffee research and impacts
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Blood Pressure and Hypertension Studies
  • Health Sciences › Nursing › Nutrition and Dietetics › Sodium Intake and Health
Keywords
coffee, caffeine, blood pressure, hypertension, systolic blood pressure, diastolic blood pressure, heart rate, caffeine consumption
MeSH terms
Adult, Aged, Blood Pressure, Coffee, Female, Heart Rate, Humans, Male, Middle Aged

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review