Evidence map›Paper›PMID 27647618›Full record

ArticleCMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne2017

The added value of C-reactive protein measurement in diagnosing pneumonia in primary care: a meta-analysis of individual patient data.

Margaretha C Minnaard, Joris A H de Groot, Rogier M Hopstaken, Alwin Schierenberg, Niek J de Wit, Johannes B Reitsma, Berna D L Broekhuizen, Saskia F van Vugt, Arie Knuistingh Neven, Aleida W Graffelman and 8 more

Open access · goldAbstract read
In one paragraph

Article in CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed, 5 pooled it
5.7field-weighted citation impact, top 4% 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

37 citing papers in PubMed, 5 syntheses or guidelines pooled it, 61 citations in OpenAlex.

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  20. What is pneumonia?Breathe (Sheffield, England) · 2021
    Review
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

18 authors at 6 institutions in 5 countries.

Margaretha C MinnaardUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands m.c.minnaard@umcutrecht.nl.
Joris A H de GrootUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Rogier M HopstakenUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Alwin SchierenbergUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Niek J de WitUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Johannes B ReitsmaUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Berna D L BroekhuizenUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Saskia F van VugtUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Arie Knuistingh NevenUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Aleida W GraffelmanUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Hasse MelbyeUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Timothy H RainerUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Johann SteurerUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Anette HolmUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Ralph GonzalesUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Geert-Jan DinantUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Alma C van de PolUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
Theo J M VerheijUniversity Medical Center Utrecht (Minnaard, de Groot, Schierenberg, de Wit, Reitsma, Broekhuizen, van Vugt, van de Pol, Verheij), Julius Center for Health Sciences and Primary Care, Utrecht, the Netherlands; Saltro Diagnostic Center for Primary Care (Hopstaken), Utrecht, the Netherlands; Department of Public Health and Primary Care (Knuistingh Neven, Graffelman), Leiden University Medical Center, Leiden, the Netherlands; Department of Community Medicine (Melbye), UiT the Arctic University of Norway, Tromsø, Norway; Chinese University of Hong Kong (Rainer), Hong Kong, China; Horten Centre for Patient Oriented Research and Knowledge Transfer (Steurer), University Zurich, Zurich, Switzerland; Department of Infectious Diseases (Holm), Odense University Hospital, Odense, Denmark; Division of General Internal Medicine (Gonzales), University of California, San Francisco, Calif.; Department of Family Medicine (Dinant), CAPHRI School for Public Health and Primary Care, Maastricht University Medical Centre, Maastricht, the Netherlands.
UiT The Arctic University of Norway · NOLeiden University Medical Center · NLMaastricht University Medical Centre · NLOdense University Hospital · DKUniversity Medical Center Utrecht · NLUniversity of Zurich · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundC-reactive protein (CRP) is increasingly being included in the diagnostic work-up for community-acquired pneumonia in primary care. Its added diagnostic value beyond signs and symptoms, however, remains unclear. We conducted a meta-analysis of individual patient data to quantify the added value of CRP measurement.

methodsWe included studies of the diagnostic accuracy of CRP in adult outpatients with suspected lower respiratory tract infection. We contacted authors of eligible studies for inclusion of data and for additional data as needed. The value of adding CRP measurement to a basic signs-and-symptoms prediction model was assessed. Outcome measures were improvement in discrimination between patients with and without pneumonia in primary care and improvement in risk classification, both within the individual studies and across studies.

resultsAuthors of 8 eligible studies (

interpretationAdding CRP measurement to the diagnostic work-up for suspected pneumonia in primary care improved the discrimination and risk classification of patients. However, it still left a substantial group of patients classified at intermediate risk, in which clinical decision-making remains challenging.

Identifiers

PMID27647618
PMCPMC5235926
OpenAlexW2523264868

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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.