Table 4.

Test performance values for CCP3 and CCP3.1 in cohort A (n = 136 RA patients and 195 disease controls).

	CCP3	CCP3.1
Sensitivity, % (95 % CI)	78.7 (71.1–84.7)	77.9 (70.3–84.1)
Specificity, % (95 % CI)	90.8 (85.9–94.1)	93.3 (88.9–96.1)
PPV, % (95 % CI)	86 (79–90)	89.1 (82.7–93.3)
NPV, % (95 % CI)	86 (82–89)	85.8 (81.5–89.3)
LR+	8.5 (5.5–13.4)	11.7 (7.0–19.9)
LR-	0.24 (0.17–0.32)	0.24 (0.17–0.32)
OR	36.3 (19.3–68.3)	49.5 (24.8–98.5)