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Table 4 Diagnostic characteristics of exercise test outcome (positive/non-conclusive tests)

From: Diagnostic characteristics and prognoses of primary-care patients referred for clinical exercise testing: a prospective observational study

Characteristic Exertional chest pain* Pathologic ST-T segment** Angina diagnosis according to the patient’s opinion
(95% CI) (95% CI) (95% CI)
Number of patients with characteristic 134 42 80
Sensitivity 69.1% (62.3-75.2) 21.3% (16.2-27.6) 43.2% (36.3-50.5)
Specificity 58.0% (54.1-61.8) 90.5% (88.0-92.5) 79.1% (75.6-82.1)
Positive predictive value 33.2% (30.4-36.2) 40.4% (32.2-49.2) 38.4% (33.2-43.9)
Negative predictive value 86.1% (83.3-88.6) 79.2% (77.9-80.4) 82.2% (80.2-84.0)
Likelihood ratio for positive test 1.7 (1.4- 1.9) 2.3 (1.6-3.2) 2.1 (1.7-2.6)
Likelihood ratio for negative test 0.5 (0.4-0.7) 0.9 (0.8-0.9) 0.7 (0.6-0.8)
Pre-test probability of having a positive/non-conclusive exercise test 23.2% 23.2% 23.2%
Net gain after positive result 10.0% (7.2-13.3) 17.2% (9.0-26.0) 15.2% (10.0-20.7)
Number of patients with characteristic per positive/non-conclusive exercise test 3.0 2.5 2.6
  1. *Chest pain when walking uphill or in a hurry. **Pathologic ST-T segment on resting electrocardiogram. Patient’s opinion of angina diagnosis: yes or no. CI: confidence interval. Positive exercise test: angina symptoms and ST-segment depression >0.1 mV during the test. Non-conclusive test: angina or ST depression. Negative test: neither angina nor ST depression.