Critical Appraisal – EBM Diagnosis

DK B-4 Semester IVFasilitator : dr. M. Ali, Sp.A

Kutipan (Citation) :

• The diagnostic value of multislice computed tomography in evaluation of coronary artery disease in patients with left bundle branch block

Validity

Importance

• Sensitivity = 104/156 x 100% = 67%• Specificity = 619/637 x 100% = 97%• Likelihood ratio for positive test result

= 0,67/(1-0,97) = 22,33• Likelihood ratio for negative test result

= (1-0,67)/0,97 = 0,34• Positive predict value = 104/122 x 100% = 85,2% (85%)• Negative predict value = 619/6671 x 100% = 92,2% (92%)• Pretest probability (prevalence) = 156/793 x 100% =

19,82% (20%)• Pre test odds = 0,2/(1-0,2) = 0,25• Post test odds = 0,25 x 22,33 = 5,6• Post test probability = 5,6/(5,6+1) x 100% = 84,8% (85%)

Applicability