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. 2010 Jan 21:8:9.
doi: 10.1186/1741-7015-8-9.

Ruling out coronary heart disease in primary care patients with chest pain: a clinical prediction score

Baris Gencer  1 , Paul Vaucher, Lilli Herzig, François Verdon, Christiane Ruffieux, Stefan Bösner, Bernard Burnand, Thomas Bischoff, Norbert Donner-Banzhoff, Bernard Favrat
Affiliations

Ruling out coronary heart disease in primary care patients with chest pain: a clinical prediction score

Baris Gencer et al. BMC Med. .

Abstract

Background: Chest pain raises concern for the possibility of coronary heart disease. Scoring methods have been developed to identify coronary heart disease in emergency settings, but not in primary care.

Methods: Data were collected from a multicenter Swiss clinical cohort study including 672 consecutive patients with chest pain, who had visited one of 59 family practitioners' offices. Using delayed diagnosis we derived a prediction rule to rule out coronary heart disease by means of a logistic regression model. Known cardiovascular risk factors, pain characteristics, and physical signs associated with coronary heart disease were explored to develop a clinical score. Patients diagnosed with angina or acute myocardial infarction within the year following their initial visit comprised the coronary heart disease group.

Results: The coronary heart disease score was derived from eight variables: age, gender, duration of chest pain from 1 to 60 minutes, substernal chest pain location, pain increasing with exertion, absence of tenderness point at palpation, cardiovascular risks factors, and personal history of cardiovascular disease. Area under the receiver operating characteristics curve was of 0.95 with a 95% confidence interval of 0.92; 0.97. From this score, 413 patients were considered as low risk for values of percentile 5 of the coronary heart disease patients. Internal validity was confirmed by bootstrapping. External validation using data from a German cohort (Marburg, n = 774) revealed a receiver operating characteristics curve of 0.75 (95% confidence interval, 0.72; 0.81) with a sensitivity of 85.6% and a specificity of 47.2%.

Conclusions: This score, based only on history and physical examination, is a complementary tool for ruling out coronary heart disease in primary care patients complaining of chest pain.

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Figures

Figure 1
Figure 1
Receiver operating characteristics curve for the Ambulatory CHD score in both derivation and validation cohorts.
Figure 2
Figure 2
Observed prevalence of CHD in both derivation and validation cohorts for each ambulatory CHD score value.
See this image and copyright information in PMC

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