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Population study: followed a group

Study that followed 195 adults for 1 year: short sleepers regained more weight

Bogh and colleagues · Sleep · 2023

Original title: Insufficient sleep predicts poor weight loss maintenance after 1 year.

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

After a 13.1 kg weight loss, short sleepers regained 5.3 kg (p = .0008) and lost less body fat (p = .007) than normal sleepers over 1 year.

The study at a glance

Type of study
Population study: followed a group
Who or what was studied
195 people · adults with obesity who lost weight on a low-calorie diet
What was tested
Sleep under 6 h a night vs 6 h or more, tracked over 1 year of weight maintenance
What it measured
The question itself: death, heart disease and other health outcomes
How long
52 weeks
Trial registration
2015-005585-32, NCT04122716
Who has a stake
No disclosure in PubMed
No disclosure in PubMed; trial also tested liraglutide, a drug.
Journal
Sleep, 2023
Source
PubMed record 36472579. 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.
  • •195 people.
  • ✓Measured the question itself: death, heart disease and other health outcomes.
  • •The PubMed record has no conflict-of-interest statement.
  • •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 reviewer corrected 1 field after reading the abstract. 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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