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. Author manuscript; available in PMC: 2015 Jul 1.
Published in final edited form as: Clin Nucl Med. 2014 Jul;39(7):609–615. doi: 10.1097/RLU.0000000000000464

Table 4. Overall diagnostic values of FDG-PET and WBC/BM imaging in knee prostheses.

FDG-PET imaging WBC/BM imaging
Sensitivity 94.7 (18/19) 33.3 (1/3)
95% Confidence Interval 75.4-99.1 (6.2-79.2)
Specificity 88.2 (60/68) 88.5 (23/26)
95% Confidence Interval 78.5-93.9 (71.0-96.0)
Positive Predictive Value (PPV) 69.2 (18/26) 25.0 (1/4)
95% Confidence Interval 50.0-83.5 (4.6-69.9)
Negative Predictive Value (NPV) 98.4 (60/61) 92.0 (23/25)
95% Confidence Interval 91.3-99.7 (75.0-97.8)
Accuracy 89.7 82.8
95% Confidence Interval 81.3-91.8 76.2-93.5
Positive Likelihood Ratio (+LR) 8.1 2.8
95% Confidence Interval 4.4-9.7 0.11-15.4
Negative Likelihood Ratio (-LR) 0.06 0.7
95% Confidence Interval 0.003-0.29 0.15-1.16
Area under the ROC curve 0.915 0.609
95% Confidence Interval 0.835-0.964 0.411-0.783