Table 1.
Intra – observer variability between skilled and non-skilled US investigator in large and small joints.
| HIP | KNEE | ANKLE | MCP | PIP | |
| Skilled Investigator | |||||
| Mean Differences ± SD (95% CI)1 |
0.04 ± 0.14 (-0.02 – 0.09) |
-0.04 ± 0.22 (-0.13 – 0.04) |
-0.23 ± 0.35 (-0.32 – 0.14) |
-0.004 ± 0.14 (0.22–0.38) |
0.06 ± 0.13 (0.01 – 0.12) |
| Non-skilled Investigator | |||||
| Mean Differences ± SD (95% CI) |
-0.03 ± 0.18 (-0.11 – 0.04) |
-0.15 ± 0.75 (-0.47 – 0.16) |
-0.06 ± 0.20 (-0.14 – 0.03) |
0.013 ± 0.21 (-0.01 – 0.09) |
0.06 ± 0.18 (-0.01 – 0.14) |
1Mean Differences in mm Cartilage Thickness – SD Standard deviation – 95% Confidence interval