| US synovitisa, n (%) | PD-positive, n (%) | ||
---|---|---|---|---|
IA (n = 31) | Non-IA (n = 143) | IA (n = 31) | Non-IA (n = 143) | |
US-positive | 17 (55) | 45 (31) | 9 (29) | 17 (12) |
 MCP | 3 (10) | 9 (6) | 1 (3) | 3 (2) |
 PIP | 3 (10) | 1 (1) | 2 (6) | 0 (0) |
 Wrists | 8 (26) | 35 (24) | 4 (13) | 15 (10) |
 MTP | 9 (29) | 11 (8) | 4 (13) | 2 (1) |