Table 3 Validity
| Â | Mean XRay | Mean Rater | Mean Difference (95% CI) | Diff. p-value (2-sided) | Concordance Correlation Coefficient (95% CI) | B-A Mean Difference (95% Limits of Agreement) |
|---|---|---|---|---|---|---|
Marker Method | ||||||
Flexion (degrees) - XRay > 20 | ||||||
XRay v RF | 90.9 | 91.5 | 0.6 (-1.3 to 2.4) | 0.54 | 0.981 (0.970 to 0.993) | 1.2 (-7.6 to 10.0) |
XRay v PT | 90.9 | 90.1 | -0.8 (-3.0 to 1.3) | 0.42 | 0.975 (0.960 to 0.991) | -0.4 (-7.1 to 6.4) |
XRay v OS | 90.9 | 90.8 | -0.1 (-2.1 to 1.9) | 0.93 | 0.980 (0.966 to 0.993) | 1.5 (-6.1 to 9.1) |
Extension (degrees) - XRay <= 20 | ||||||
XRay v RF | 6.0 | 13.8 | 7.8 (2.2 to 13.5) | 0.01 | 0.540 (0.359 to 0.721) | 9 (-6.0 to 24.0) |
XRay v PT | 6.0 | 12.1 | 6.1 (1.2 to 11.0) | 0.02 | 0.611 (0.430 to 0.792) | 3 (-9.3 to 15.6) |
XRay v OS | 6.0 | 12.8 | 6.8 (1.9 to 11.7) | 0.01 | 0.586 (0.404 to 0.767) | 8 (-9.0 to 25.0) |
Line of Femur Method | ||||||
Flexion (degrees) - XRay > 20 | ||||||
XRay v RF | 90.9 | 92.1 | 1.2 (-0.8 to 3.2) | 0.21 | 0.978 (0.963 to 0.994) | 1.0 (-6.0 to 8.1) |
XRay v PT | 90.9 | 90.5 | -0.4 (-1.9 to 1.2) | 0.62 | 0.988 (0.980 to 0.996) | -0.8 (-10.2 to 8.5) |
XRay v OS | 90.9 | 92.4 | 1.5 (-0.2 to 3.2) | 0.08 | 0.982 (0.971 to 0.994) | -0.1 (-8.9 to 8.7) |
Extension (degrees) - XRay <= 20 | ||||||
XRay v RF | 6.0 | 15.0 | 9.0 (3.1 to 14.9) | <0.01 | 0.478 (0.294 to 0.662) | 8.9 (-6.7 to 24.6) |
XRay v PT | 6.0 | 9.1 | 3.1 (-1.8 to 8.0) | 0.18 | 0.678 (0.493 to 0.862) | 6.1 (-6.5 to 18.7) |
XRay v OS | 6.0 | 14.0 | 8.0 (1.3 to 14.7) | 0.02 | 0.497 (0.305 to 0.689) | 6.8 (-5.8 to 19.3) |