UA at baseline, N = 123 | RA after 1 year, N = 64 | No RA after 1 year, N = 59 | P value | |
---|---|---|---|---|
Clinical parameters | ||||
Age, mean (SD) | 57 (18) | 59 (19) | 55 (16) | 0.29 |
Female, n (%) | 73 (59) | 40 (63) | 33 (56) | 0.46 |
Symptom duration, in weeks, median (IQR) | 9 (4–27) | 12 (6–30) | 8 (3–21) | 0.048 |
Swollen joint count, median (IQR) | 2 (1–4) | 3 (2–5) | 1 (1–3) | < 0.001 |
Presence of swollen joint foot, n (%) | 25 (20) | 12 (20) | 13 (22) | 0.65 |
Presence of swollen joint hand, n (%) | 66 (54) | 40 (63) | 26 (44) | 0.041 |
Presence of tender joint foot, n (%) | 32 (26) | 17 (27) | 15 (25) | 0.89 |
Presence of tender joint hand, n (%) | 71 (58) | 44 (69) | 27 (46) | 0.010 |
CRP, mg/L, median (IQR) | 5 (3–14) | 6 (3–16) | 3 (3–9) | 0.035 |
ACPA positive, n (%) | 6 (5) | 4 (7) | 2 (3) | 0.44 |
RF positive, n (%) | 8 (7) | 5 (8) | 3 (5) | 0.53 |
MRI features | ||||
MTP 1–5 | ||||
Tenosynovitis, mean (SD) | 0.6 (1.3) | 0.8 (1.4) | 0.4 (1.1) | 0.075 |
Synovitis, mean (SD) | 0.7 (1.0) | 0.7 (1.0) | 0.7 (1.1) | 0.69 |
BME, mean (SD) | 0.8 (1.4) | 0.6 (0.9) | 1.0 (1.7) | 0.50 |
MCP 2–5 | ||||
Tenosynovitis, mean (SD) | 1.4 (2.0) | 2.0 (2.3) | 0.8 (1.2) | < 0.001 |
Synovitis, mean (SD) | 1.6 (1.8) | 2.1 (1.9) | 1.1 (1.5) | 0.001 |
BME, mean (SD) | 0.6 (1.5) | 0.6 (1.3) | 0.7 (1.6) | 0.85 |
Wrist | ||||
Tenosynovitis, mean (SD) | 2.4 (3.1) | 3.2 (3.5) | 1.5 (2.4) | 0.006 |
Synovitis, mean (SD) | 1.9 (2.1) | 2.4 (2.3) | 1.5 (1.8) | 0.023 |
BME, mean (SD) | 3.0 (5.2) | 3.5 (5.8) | 2.5 (4.5) | 0.57 |