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. 2017 Dec 25;9(12):5940–5947. doi: 10.19082/5940

Table 3.

Cut-off point and diagnostic accuracy of serum cartilage oligomeric matrix protein (COMP) in the diagnosis of late rheumatoid arthritis (RA)

Optimal cut-off point (Youden index) Sensitivity Specificity PPV NPV Positive LR
15.25 U/L 68% 72% 70% 69% 2.42

PPV= positive predictive value; NPV= negative predictive value; LR= likelihood ratio