Evidence map›Paper›PMID 24143086›Full record

ArticleInternational journal of chronic obstructive pulmonary disease2013

Development and validation of a model to predict the risk of exacerbations in chronic obstructive pulmonary disease.

Loes C M Bertens, Johannes B Reitsma, Karel G M Moons, Yvonne van Mourik, Jan Willem J Lammers, Berna D L Broekhuizen, Arno W Hoes, Frans H Rutten

Open access · goldAbstract readValidation Study
In one paragraph

Article in International journal of chronic obstructive pulmonary disease, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed, 3 pooled it
2.6field-weighted citation impact, top 10% 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

35 citing papers in PubMed, 3 syntheses or guidelines pooled it, 71 citations in OpenAlex.

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  4. Early Clinically Important Improvement (ECII) and Exacerbation Outcomes in COPD Patients.International journal of chronic obstructive pulmonary disease · 2020
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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

8 authors at 2 institutions in 2 countries.

Loes C M BertensJulius Center for Health Sciences and Primary Care, Utrecht, the Netherlands.
Johannes B Reitsma
Karel G M Moons
Yvonne van Mourik
Jan Willem J Lammers
Berna D L Broekhuizen
Arno W Hoes
Frans H Rutten
Oklahoma State University Center for Health Sciences · USUniversity Medical Center Utrecht · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposePrediction models for exacerbations in patients with chronic obstructive pulmonary disease (COPD) are scarce. Our aim was to develop and validate a new model to predict exacerbations in patients with COPD. PATIENTS AND

methodsThe derivation cohort consisted of patients aged 65 years or over, with a COPD diagnosis, who were followed up over 24 months. The external validation cohort consisted of another cohort of COPD patients, aged 50 years or over. Exacerbations of COPD were defined as symptomatic deterioration requiring pulsed oral steroid use or hospitalization. Logistic regression analysis including backward selection and shrinkage were used to develop the final model and to adjust for overfitting. The adjusted regression coefficients were applied in the validation cohort to assess calibration of the predictions and calculate changes in discrimination applying C-statistics.

resultsThe derivation and validation cohort consisted of 240 and 793 patients with COPD, of whom 29% and 28%, respectively, experienced an exacerbation during follow-up. The final model included four easily assessable variables: exacerbations in the previous year, pack years of smoking, level of obstruction, and history of vascular disease, with a C-statistic of 0.75 (95% confidence interval [CI]: 0.69-0.82). Predictions were well calibrated in the validation cohort, with a small loss in discrimination potential (C-statistic 0.66 [95% CI 0.61-0.71]).

conclusionOur newly developed prediction model can help clinicians to predict the risk of future exacerbations in individual patients with COPD, including those with mild disease.

Indexed as

Decision Support TechniquesAdministration, OralAgedComorbidityDiscriminant AnalysisDisease ProgressionFemaleHospitalizationHumansLogistic ModelsLungMaleMiddle AgedMultivariate AnalysisOdds RatioPredictive Value of TestsSteroidsexacerbation of COPDexternal validationrisk predictionvascular disease

Identifiers

PMID24143086
PMCPMC3797610
OpenAlexW1994535720

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.