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