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Table 3 Comparison between diagnostic indices of routine MRI and T2 mapping

From: Role of adding T2 mapping sequence to the routine MR imaging protocol in the assessment of articular knee cartilage in osteoarthritis

Parameter TP TN FP FN Accuracy(a) Sensitivity Specificity PPV(a) NPV(a)
Routine MRI 22 20 0 8 94.7 73.3% 100% 100% 63.1%
T2 value (ms) 29 18 2 1 91.3 96.7% 90.0% 70.7% 99.1%
  1. aThis value is dependent on disease prevalence (20%)