Table 1 Baseline characteristics of the total group of patients with early arthritis and the subgroups of patients with rheumatoid arthritis (RA) or undifferentiated arthritis (UA)
Variable | All patients with early arthritis | Subgroup of patients with RA or UA |
|---|---|---|
(n = 589) | (n = 397) | |
Age, mean (sd) | 54.8 (16) | 54.9 (15) |
Female, n (%) | 363 (62) | 253 (64) |
Symptom duration, median (IQR), weeks | 12.6 (5–27) | 12.2 (5–26.2) |
TJC, median (IQR) | 4 (2–7) | 4 (2–6) |
SJC, median (IQR) | 3 (2–7) | 3 (2–7) |
CRP (mg/L), median (IQR) | 5.7 (3–17) | 6 (3–17) |
ACPA positivity, n (%) | 141 (24) | 123 (31) |
RF positivity, n (%) | 193 (33) | 151 (38) |
anti-CarP positivity, n (%) | 88 (15) | 71 (18) |
Total RAMRIS, median (IQR) | 12.5 (5.5–24) | 13.5 (6–24) |
Total BME score, median (IQR) | 2.5 (1–6) | 2.5 (1–6) |
Total synovitis score, median (IQR) | 3.5 (1–7.5) | 4 (1.5–8) |
Total tenosynovitis score, median (IQR) | 2 (0–6) | 3 (0.5–6) |