Table 4.
Standard values and the accepted range of each lower limb parameter [12, 18], interobserver-ICC2,1, Standard Error of Measurement (SEM) and proportional error
| Measures | Standard value | Accepted range | Interobserver-ICC2,1 | SEM95% | SEM95%Range | Proportional error in % |
|---|---|---|---|---|---|---|
| MFA (°) | 1.3 ± 3 | 6 | 0.949 (0.859–0.975) | ± 1.39 | 2.78 | 46.33 |
| MAD (mm) | 8 ± 7 | 14 | 0.976 (0.966–0.983) | ± 3.31 | 6.62 | 47.29 |
| mLPFA (°) | 90 ± 5 | 10 | 0.974 (0.964–0.981) | ± 1.69 | 3.38 | 33.80 |
| mLDFA (°) | 88 ± 2.5 | 5 | 0.969 (0.954–0.979) | ± 1.06 | 2.12 | 42.40 |
| mMPTA (°) | 87 ± 2.5 | 5 | 0.864 (0.816–0.901) | ± 1.29 | 2.58 | 51.60 |
| mLDTA (°) | 89 ± 3 | 6 | 0.876 (0.831–0.909) | ± 2.17 | 4.34 | 72.33 |
| JLCA (°) | 1 ± 1 | 2 | 0.488 (0.350–0.605) | ± 1.38 | 2.76 | 138.00 |
| Femur length (mm) | N/A | N/A | 0.996 (0.994–0.997) | ± 4.53 | N/A | N/A |
| Tibia length (mm) | N/A | N/A | 0.994 (0.990–0.998) | ± 3.12 | N/A | N/A |
Interobserver-ICC2,1 (95% confidence interval in parenthesis) with Standard Error of Measurement (SEM) with a 95% confidence interval. For interobserver-ICC2,1 first measurement results of observer 1 were compared with first measurement results of observer 2
MFA Mechanical Femorotibial Angle; MAD Mechanical Axis Deviation; mLPFA mechanical Lateral Proximal Femur Angle; mLDFA mechanical Lateral Distal Femur Angle; mMPTA mechanical Medial Proximal Tibia Angle; mLDTA mechanical Lateral Distal Tibia Angle; JLCA Joint Line Convergence Angle, length of the femur and tibia
For values of femur length and tibia length there are no standard values and therefore no accepted ranges, SEM95%Range or proportional errors are not applicable (N/A)