Table 1.
Patient and physician characteristics at baseline
| Average patients | N | Mean | SD | Minimum | Median | Maximum |
|---|---|---|---|---|---|---|
| Age (years) | 104 | 54.6 | 14.2 | 20.9 | 56.9 | 82.1 |
| DAS28, score: 0-10 | 100 | 5.1 | 1.2 | 1.5 | 5.1 | 7.4 |
| C-Reactive Protein, mg/l | 100 | 20 | 22 | 0 | 12 | 97 |
| Swollen joint count, 0-28 | 100 | 8 | 5.25 | 0 | 6 | 26 |
| Tender joint count, o-28 | 100 | 11 | 7.8 | 0 | 10 | 28 |
| VAS global (0-100 mm) | 100 | 58 | 24.1 | 4 | 60.5 | 100 |
| Disease duration (years) | 76 | 8.8 | 7.7 | 0 | 6 | 32 |
| Average physician | N | Mean | SD | Minimum | Median | Maximum |
| US examination (minutes) | 13 | 33.2 | 11.3 | 14 | 32 | 65 |
| Scoring percentage | 13 | 90 | 10.2 | 48 | 93 | 100 |
| Scanning experience (months) | 13 | 54 | 50 | 3 | 36 | 180 |
| Scanning experience (number) | 13 | 807 | 1475 | 4 | 250 | 5000 |
| Degree of Supervision (1 to 3)* | 13 | 1.7 | 0.6 | 1 | 2 | 3 |
* 1 = none, 2 = moderate, 3 = extensive