Cut off (U/ml) Sensitivity % [95% CI] Specificity % [95% CI] positive predictive values % [95% CI] Negative predictive values % [95% CI] Anti-MCV 21.5 (U/ml) 75.56 (60.5-87.1) 93.33 (68.1-99.8) 82.24 (78-96.22) 87.4 (69-81.42) Anti-CCP2 21 (U/ml) 85.71 (42.1-99.6) 98.11 (89.9 - 100.0) 86 (62.1-89.6) 93 (89.7%-99.6)

Table 3: Diagnostic effectiveness of the anti-MCV test and the anti-cyclic citrullinated peptide in RA patients.