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Pooled individual patient data from five countries were used to derive a clinical prediction rule for coronary artery disease in primary care.
Interuniversity Institute for Biostatistics and Statistical Bioinformatics.
Interuniversity Institute for Biostatistics and Statistical Bioinformatics.
Department of General Practice and Family Medicine, Philipps University Marburg, Germany..
Department of Public Health and Primary Care, KU Leuven, Belgium; Department of General Practice, Maastricht University, The Netherlands..
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2017 (English)In: Journal of Clinical Epidemiology, ISSN 0895-4356, E-ISSN 1878-5921, Vol. 81, 120-128 p.Article in journal (Refereed) Published
Abstract [en]

OBJECTIVE: To construct a clinical prediction rule for coronary artery disease (CAD) presenting with chest pain in primary care.

STUDY DESIGN AND SETTING: Meta-Analysis using 3,099 patients from five studies. To identify candidate predictors, we used random forest trees, multiple imputation of missing values, and logistic regression within individual studies. To generate a prediction rule on the pooled data, we applied a regression model that took account of the differing standard data sets collected by the five studies.

RESULTS: The most parsimonious rule included six equally weighted predictors: age ≥55 (males) or ≥65 (females) (+1); attending physician suspected a serious diagnosis (+1); history of CAD (+1); pain brought on by exertion (+1); pain feels like "pressure" (+1); pain reproducible by palpation (-1). CAD was considered absent if the prediction score is <2. The area under the ROC curve was 0.84. We applied this rule to a study setting with a CAD prevalence of 13.2% using a prediction score cutoff of <2 (i.e., -1, 0, or +1). When the score was <2, the probability of CAD was 2.1% (95% CI: 1.1-3.9%); when the score was ≥ 2, it was 43.0% (95% CI: 35.8-50.4%).

CONCLUSIONS: Clinical prediction rules are a key strategy for individualizing care. Large data sets based on electronic health records from diverse sites create opportunities for improving their internal and external validity. Our patient-level meta-analysis from five primary care sites should improve external validity. Our strategy for addressing site-to-site systematic variation in missing data should improve internal validity. Using principles derived from decision theory, we also discuss the problem of setting the cutoff prediction score for taking action.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 81, 120-128 p.
Keyword [en]
Chest pain, Individual patient data meta-analysis, Medical history taking, Myocardial ischemia, Primary health care, Sensitivity and specificity, Symptom assessment
National Category
Public Health, Global Health, Social Medicine and Epidemiology Cardiac and Cardiovascular Systems
Identifiers
URN: urn:nbn:se:liu:diva-135309DOI: 10.1016/j.jclinepi.2016.09.011ISI: 000395497500016PubMedID: 27773828OAI: oai:DiVA.org:liu-135309DiVA: diva2:1080496
Note

Funding agencies: Federal Ministry of Education and Research, Germany (BMBF) [FKZ 01GK0920]

Available from: 2017-03-10 Created: 2017-03-10 Last updated: 2017-04-24

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Division of Community MedicineFaculty of Medicine and Health SciencesPrimary Health Care in Norrköping
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CiteExportLink to record
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