Skip to main content
. Author manuscript; available in PMC: 2022 Feb 1.
Published in final edited form as: J Arthroplasty. 2020 Aug 5;36(2):688–692. doi: 10.1016/j.arth.2020.07.076

Table 3.

Confusion Matrix for PJI detection.

Gold Standard → NLP ↓ Yes No Total
Yes 133 9 142 Positive predictive value (Precision) 133/142=0.937
No 17 1020 1037 Negative predictive value 1020/1037=0.984
Total 150 1029 1179 F1 score=0.911
Sensitivity (recall) 133/150=0.887 Specificity 1020/1029=0.991