Evidence map›Paper›PMID 29909368›Full record

ArticleBMJ open2018

Long weekly working hours and ischaemic heart disease: a follow-up study among 145 861 randomly selected workers in Denmark.

Harald Hannerz, Ann Dyreborg Larsen, Anne Helene Garde

Open access · goldAbstract read
In one paragraph

Article in BMJ open, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 2 pooled it
5.5field-weighted citation impact, top 5% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

14 citing papers in PubMed, 2 syntheses or guidelines pooled it, 19 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Observational
  4. Article
  5. Working hours and cardiovascular disease.Scandinavian journal of work, environment & health · 2024
    Article
  6. Article
  7. Article
  8. Long working hours and psychiatric treatment: A Danish follow-up study.Scandinavian journal of work, environment & health · 2021
    Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 2 institutions in 1 country.

Harald HannerzNational Research Centre for the Working Environment, Copenhagen, Denmark.
Ann Dyreborg LarsenNational Research Centre for the Working Environment, Copenhagen, Denmark.
Anne Helene GardeNational Research Centre for the Working Environment, Copenhagen, Denmark.
National Research Centre for the Working Environment · DKUniversity of Copenhagen · DK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThe aim of the present study was to test if incidences of ischaemic heart disease (IHD) and usage of antihypertensive drugs are independent of weekly working hours (WWH) among full-time employees in Denmark. DESIGN AND

participantsData on WWH from participants of the Danish labour force surveys, 1999-2013, were linked on an individual level to national registers with data on socioeconomic status (SES), industry, emigrations, redeemed prescriptions, hospital contacts and deaths. Participants were followed until the end of 2014 (on average 7.7 years). Poisson regression was used to model incidence rates as a function of WWH. The analyses were controlled for calendar time, time passed since start of follow-up, employment in the healthcare industry, age, sex, SES and night work.

resultsIn total, we found 3635 cases of IHD and 20 648 cases of antihypertensive drug usage. The rate ratio of IHD was 0.95 (95% CI 0.85 to 1.06) for 41-48 compared with 32-40 WWH and 1.07 (0.94 to 1.21) for >48 compared with 32-40 WWH. The corresponding rate ratios for antihypertensive drug usage were 0.99 (0.95 to 1.04) and 1.02 (0.97 to 1.08). No statistically significant interactions between WWH and sex, SES and night work, respectively, were found.

conclusionIn this Danish sample, we did not find any statistically significant association between WWH and IHD or antihypertensive drug usage.

Indexed as

Work Schedule ToleranceAdultAntihypertensive AgentsDenmarkFemaleFollow-Up StudiesHumansIncidenceMaleMiddle AgedMyocardial IschemiaRegression AnalysisRisk FactorsSex FactorsSocioeconomic FactorsSurveys and QuestionnairesAntihypertensive Agentsblinded statistical analysiscardiovascular diseaseEU working time directivehospital treatmenthypothesis testingoccupational health

Identifiers

PMID29909368
PMCPMC6009463
OpenAlexW2807881869

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.