Fig. 1
Illustration of the association between anti-citrullinated protein antibodies (ACPA) (a), rheumatoid factor (RF) (b) and anti-carbamylated protein antibodies (anti-CarP) (c), and magnetic-resonance-imaging-detected bone marrow edema (BME), synovitis and tenosynovitis scores in early arthritis (n = 589). Horizontal lines represent median. Whiskers show the 10th–90th percentile. Dots represent outliers. a BME: p ≤ 0.001; synovitis: p = 0.084; tenosynovitis: p = 0.064. b BME: p ≤ 0.001; synovitis: p = 0.001; tenosynovitis: p = 0.004. c BME: p ≤ 0.012; synovitis: p = 0.021; tenosynovitis: p = 0.013. Total score: sum of scores in metacarpophalangeal, wrist, and metatarsophalangeal joints. *Significant difference (p < 0.05) between autoantibody-negative and autoantibody-positive patients