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Table 3 Diagnostic performances for the prediction of a major adverse cardiac event

From: Use of troponin assay after electrical injuries: a 15-year multicentre retrospective cohort in emergency departments

For prediction of MACE in the whole population (n = 533 patients*) The 4 high-risk clinical items Initial positive troponin assay Troponin rise
Sensitivity, % (95% CI) 100.0 (54.1–100) 83.3 (35.9–99.6) 33.3 (4.3–77.7)
Specificity, % (95% CI) 76.6 (73.4–79.6) 97.7 (96.1–98.8) 99.2 (98.3–99.7)
Predictive value, % (95% CI)    
Positive 4.3 (3.8–4.9) 29.3 (17.5–44.6) 24.9 (7.7–56.9)
Negative 100.0 (99.9–100.0) 99.9 (99.2–99.9) 99.5 (99.1–99.7)
Likelihood ratio (95% CI)    
Positive 4.6 (4.1–5.2) 36.6 (18.8–71.1) 43.3 (10.8–172.7)
Negative 0 0.17 (0.03–1.02) 0.7 (0.4–1.2)
Accuracy, % (95% CI) 76.9 (73.7–79.8) 97.6 (95.9–98.7) 98.7 (97.7–99.4)
For prediction of MACE in high-risk population (= 153 patients*) Initial positive troponin assay Troponin rise
Sensitivity, % (95% CI) 83.3 (35.9–99.6) 33.3 (4.3–77.7)
Specificity, % (95% CI) 95.2 (90.4–98.1) 97.2 (93.5–99.1)
Predictive value, % (95% CI)   
Positive 41.7 (24.2–61.5) 28.5 (8.8–62.4)
Negative 99.3 (95.9–99.9) 97.7 (96.1–98.7)
Likelihood ratio (95%CI)   
Positive 17.5 (7.8–39.2) 11.8 (2.8–49.0)
Negative 0.2 (0.0–1.1) 0.7 (0.4–1.2)
Accuracy, % (95% CI) 94.8 (90.0–97.7) 95.1 (90.9–97.7)
  1. *Performed in patients with troponin assay
  2. MACE major adverse cardiac event, 95% CI 95% confidence interval