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Population study: followed a group

Study of Swiss adults with irregular heartbeat: daily coffee linked to fewer heart events

Iten and colleagues · BMC medicine · 2024

Original title: Coffee consumption and adverse cardiovascular events in patients with atrial fibrillation.

Under review. A person has not yet checked this summary against the paper. It is written from the PubMed abstract. Until a person checks it, search engines are asked not to list this page.

What the study found

Points to benefit

Daily coffee went with a lower risk of major heart events (HR 0.77 (0.66; 0.89)). The authors also report lower all-cause mortality, but give no number in the abstract.

The study at a glance

Type of study
Population study: followed a group
Who or what was studied
Adults with an irregular heartbeat (atrial fibrillation) in two Swiss follow-up studies
What was tested
Compared daily coffee drinkers with people who did not drink it daily, followed a median of 4.7 years
What it measured
Several kinds of outcomes
Trial registration
NCT02105844
Who has a stake
No stake declared
No competing interests declared.
Journal
BMC medicine, 2024
Source
PubMed record 39696255. This page is based on the abstract only.

How much this study counts

  • –Shows a link, not a cause: people chose their own habits, and other differences between them may explain the result.
  • ✓Followed people over time, so habits were recorded before the outcome happened.
  • •The abstract does not say how many people took part.
  • •Measured several kinds of outcomes.
  • ✓No competing interests declared.
  • •Summarized from the PubMed abstract only. The full paper may hold details the abstract leaves out.

✓ Strength– Limit• Note

These points come from fixed rules about the type of study, its size and length, what it measured, and who has a stake. Every study on Digestery gets the same rules.

Where this study sits

Each dot is one on-topic paper on this question. Steps near the top answer the question more directly.

↑ Stronger evidence

  1. Trials in people: death from any cause

    0

    Not done yet. This is the step that would answer the question.

  2. Trials in people: other measures

    0

    None among the papers we read.

  3. Trials in people: lab tests or safety

    0

    None among the papers we read.

  4. Population studies

    7

    6 benefit, 1 no difference

    ↑ This study is the ringed dot

  5. Blood levels and genes

    0

    None among the papers we read.

↓ Weaker evidence

  • Points to benefit
  • Mixed
  • No difference
  • No direction
  • Points to harm

How it fits with the other research

The short answer to “Does coffee help you live longer?”

Linked to lower death risk; cause unproven.

Confidence: low. Based on 15 on-topic papers.

Read the full answer

Of the other 6 papers on the same step: 5 benefit, 1 no difference. This one found benefit. It agrees with most of them.

Other papers on the same step

See all 15 studies on this question

How this page was made

Label

First read of the abstract
Claude Sonnet
Independent second read
Claude Haiku
Differences settled
The two reads agreed on every checked field. Claude Opus 5.5.
Headline
Claude Sonnet, from the checked study record. A script checked its numbers and wording.
Numbers
Checked against the abstract by a script
“How much this study counts”
Fixed rules, the same for every study
Source check by a person
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