Factors associated with baseline concordance between synovitis by clinical joint examination (CJE) and by B-mode ultrasonography (B-US) or power Doppler (PDUS). The data are OR (95% CI).
| CJE vs B-US | CJE vs B-US ≥ 1 | |||
| Factor | Value (n) | Concordance Rate (%) | OR (95% CI) | p vs Reference Value |
| DAS28 ESR | ≤ 3.2 (208) | 80.3 | 2.26 (1.46; 3.49) | < 0.001 |
| 3.2–5.1 (624) | 72.0 | 1.61 (1.22; 2.12) | < 0.001 | |
| > 5.1 (985; reference) | 65.3 | — | — | |
| RF | Positive (1536) | 71.4 | 1.31 (1.00; 1.71) | 0.048 |
| Negative or unknown (441; reference) | 62.4 | — | — | |
| CJE vs PDUS | CJE vs PDUS ≥ 1 | |||
| Age, yrs | < 40 (208) | 77.4 | 0.71 (0.44; 1.14) | 0.157 |
| 40–50 (416) | 71.4 | 0.66 (0.47; 0.93) | 0.019 | |
| 50–60 (674) | 74.9 | 1.06 (0.77; 1.44) | 0.736 | |
| > 60 (669; reference) | 74.6 | — | — | |
| Sex | Male (309; reference) | 67.3 | — | — |
| Female (1658) | 75.6 | 1.52 (1.07; 2.15) | 0.019 | |
| Disease duration, yrs | < 2 (414) | 77.8 | 1.33 (0.93: 1.90) | 0.124 |
| 2–5 (337) | 60.5 | 0.58 (0.42; 0.80) | < 0.001 | |
| 5–10 (361) | 80.6 | 1.41 (0.97; 2.05) | 0.068 | |
| > 10 (855; reference) | 75.4 | — | — | |
| DAS28 ESR | ≤ 3.2 (208) | 79.8 | 1.35 (0.88; 2.09) | 0.174 |
| 3.2–5.1 (624) | 77.4 | 1.57 (1.17; 2.10) | 0.002 | |
| > 5.1 (985; reference) | 70.7 | — | — |
DAS28 ESR: Disease Activity Score on 28 joints computed using the erythrocyte sedimentation rate; RF: rheumatoid factor.