15283-B-Blokker

112 Chapter 6 Table 4. Diagnostic accuracy of CT (Total Agatston calcium score) Prevalence of disease (%) N TP TN FP FN K Sensitivity (%) Specificity (%) Calcium score >0 Acute MI 34 99 29 13 52 5 0.04 85 (68-95) 20 (11-32) Chronic MI 40 99 38 16 43 2 0.19 95 (83-99) 27 (16-40) Calcium score >100 Acute MI 34 99 24 30 35 10 0.14 71 (53-85) 46 (34-59) Chronic MI 40 99 32 32 27 8 0.32 80 (64-91) 54 (41-67) Calcium score >400 Acute MI 34 99 17 41 24 17 0.13 50 (32-68) 63 (50-75) Chronic MI 40 99 25 43 16 15 0.35 63 (46-77) 73 (59-84) N, number; TP, true positives; TN, true negatives; FP, false positives; FN, false negatives; K, kappa measure of agreement; MI, myocardial infarction. Values in parentheses represent upper and lower bound for 95% confidence interval.