Evidence map›Paper›PMID 10903649›Full record

ArticleBMJ (Clinical research ed.)2000

Chlamydia pneumoniae infection and mortality from ischaemic heart disease: large prospective study.

N J Wald, M R Law, J K Morris, X Zhou, Y Wong, M E Ward

Open access · bronzeAbstract read
In one paragraph

Article in BMJ (Clinical research ed.), 2000. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 1 pooled it
12.0field-weighted citation impact, top 1% 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

13 citing papers in PubMed, 1 synthesis or guideline pooled it, 78 citations in OpenAlex.

  1. Pooled it
  2. Chlamydophila pneumoniae infection and cardiovascular disease.North American journal of medical sciences · 2013
    Article
  3. Article
  4. Article
  5. Article
  6. Parachlamydiaceae: potential emerging pathogens.Emerging infectious diseases · 2002
    Review
  7. Review
  8. Article
  9. Article
  10. Review
  11. Article
  12. Article
  13. Heart disease and the inflammatory response.BMJ (Clinical research ed.) · 2000
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors.

N J WaldBUPA Epidemiological Research Group, Wolfson Institute of Preventive Medicine, St Bartholomew's and the Royal London School of Medicine and Dentistry, London EC1M 6BQ. n.j.wald@mds.qmw.ac.uk
M R Law
J K Morris
X Zhou
Y Wong
M E Ward

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo determine whether there is an independent association between infection with Chlamydia pneumoniae and ischaemic heart disease.

designProspective study using a nested case-control design.

settingMedical centre in London run by BUPA, a private medical organisation.

participants21 520 professional men aged 35-64 who attended for a medical examination in London between 1975 and 1982.

main outcome measureDeath from ischaemic heart disease.

resultsThe distributions of concentrations of IgG and IgA antibodies to C pneumoniae were similar in the 647 men who subsequently died of ischaemic heart disease and in 1294 age matched controls who did not. There was no material association with heart disease irrespective of the cut-off point chosen to define seropositivity. At a cut-off point that defines 15% of controls as positive, for example, the odds ratios were 1.26 (95% confidence interval 0.95 to 1.68) for IgG and 1.09 (0.82 to 1.43) for IgA.

conclusionsNo material association was found between infection with C pneumoniae and ischaemic heart disease. The size and prospective design of the study and the socioeconomic homogeneity of the cohort minimise both random and systematic error.

Indexed as

Chlamydophila pneumoniaeAdultAntibodies, BacterialCase-Control StudiesChlamydia InfectionsHumansImmunoglobulin AImmunoglobulin GLondonMaleMiddle AgedMyocardial InfarctionProspective StudiesRisk FactorsAntibodies, BacterialImmunoglobulin AImmunoglobulin G

Identifiers

PMID10903649
PMCPMC27436
OpenAlexW2019740526

What OpenQuestion holds

Textmetadata
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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.