Figure 1From: The likelihood of persistent arthritis increases with the level of anti-citrullinated peptide antibody and immunoglobulin M rheumatoid factor: a longitudinal study of 376 patients with very early undifferentiated arthritisReceiver operating characteristic curve analysis. Receiver operating characteristic (ROC) curve analysis investigating the discriminatory capacity for persistent arthritis at one year of baseline antibody levels. Area under the curve (AUC) (95% confidence interval): Anti-CCP: 0.687 (0.633 to 0.742), IgM RF: 0.641 (0.585 to 0.697).Back to article page