Synovitis assessed by immunohistochemistry
| Marker | SpA (n=8) | RA (n=10) | CA (n=5) | p Value SpA vs RA |
|---|---|---|---|---|
| CD3 | 1.5 (0.0–3.0) | 0.5 (0.0–1.3) | 0.5 (0.5–1.3) | 0.212 |
| CD22 | 0.0 (0.0–1.3) | 0.0 (0.0–0.6) | 0.0 (0.0–0.75) | 0.536 |
| CD68 lining | 2.0 (1.0–2.5) | 1.5 (1.0–1.9) | 2.0 (1.0–2.8) | 0.485 |
| CD68 sublining | 2.0 (0.5–2.5) | 0.8 (0.5–1.4) | 1.5 (1.0–1.8) | 0.249 |
| CD163 lining | 1.0 (0.0–2.0) | 1.0 (0.0–2.0) | 1.0 (0.5–2.5) | 0.798 |
| CD163 sublining | 2.0 (1.0–2.0) | 1.0 (0.8–1.3) | 1.0 (1.0–2.0) | 0.030 |
| von Willebrand factor | 2.0 (1.0–2.0) | 1.5 (1.3–2.6) | 1.5 (1.0–2.0) | 0.964 |
Values are the median (IQR).
Significance of the comparisons is determined by Mann-Whitney U tests. p<0.05 was considered statistically significant. There were no significant differences compared with CA.
CA, crystal arthropathy; RA, rheumatoid arthritis; SpA, spondyloarthritis.