Fig. 4
Bone marrow edema (BME) scores in anti-citrullinated protein antibodies (ACPA)-positive patients with early arthritis (n = 141) with low, intermediate, or high levels of ACPA. Horizontal lines represent median. Whiskers show the 10th–90th percentile. Dots represent outliers. Baseline ACPA is shown categorically as low, intermediate, or high. The groups were as follows: low ≥7 U/ml, intermediate ≥167 U/ml and high ≥327 U/ml. Low: n = 64; intermediate: n = 32; high: n = 45. Kruskal-Wallis test, p = 0.14