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Population study: one-time survey

Survey of 27,473 Taiwan adults: short sleep linked to higher odds of obesity

Lin and colleagues · Scientific reports · 2025

Original title: Interactive effects of sleep duration and dietary patterns on obesity moderated by age.

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What the study found

Points to benefit

Short sleep was linked to 21% higher odds of obesity than adequate sleep (OR 1.21; 95% CI, 1.15-1.29). Younger adults with too little sleep had higher odds than older adults.

The study at a glance

Type of study
Population study: one-time survey
Who or what was studied
27,473 people · adults in Taiwan from a health check-up program
What was tested
Short sleep vs adequate sleep, with four diet patterns, and obesity
What it measured
The question itself: death, heart disease and other health outcomes
Who has a stake
No stake declared
No competing interests declared.
Journal
Scientific reports, 2025
Source
PubMed record 41044106. This page is based on the abstract only.

How much this study counts

  • –A one-time snapshot: it shows a link, not a cause, and cannot show which came first.
  • ✓Large: 27,473 people.
  • ✓Measured the question itself: death, heart disease and other health 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 and chronic disease

    0

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

  2. Trials in people: other measures

    1

    1 benefit

  3. Trials in people: lab tests or safety

    0

    None among the papers we read.

  4. Population studies

    11

    5 benefit, 4 mixed, 2 no difference

    ↑ This study is the ringed dot

  5. Blood levels and genes

    1

    1 benefit

↓ Weaker evidence

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

How it fits with the other research

The short answer to “How much sleep do adults need for good health?”

Lowest risk at about 7 hours.

Confidence: low. Based on 22 on-topic papers.

Read the full answer

Of the other 10 papers on the same step: 4 benefit, 4 mixed, 2 no difference. This one found benefit.

Other papers on the same step

See all 22 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 differed. The reviewer checked the abstract and kept the first read. 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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