Table 3.
Inter-rater reliability of the two experts and the algorithmic system. The following measured parameters were compared: mechanical axis deviation (MAD), mechanical lateral proximal femoral angle (mLPFA), anatomical mechanical angle (AMA), mechanical lateral distal femoral angle (mLDFA), joint-line convergence angle (JLCA), mechanical medial proximal tibia angle (mMPTA), mechanical lateral distal tibia angle (mLDTA), hip-knee-ankle angle (HKA), mechanical axis length (Mikulicz line) and leg axis (varus, valgus).
| Inter-Rater Reliability-Rater 1 vs. Rater 2 vs. Software | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total | Pre-Operative | Post-Operative | ||||||||||
| n | ICC | 95% CI | n | ICC | 95% CI | n | ICC | 95% CI | ||||
| MAD | 150 | 1 | 0.99 | 1 | 70 | 1 | 1 | 1 | 80 | 0.99 | 0.99 | 1 |
| mLPFA | 155 | 0.93 | 0.91 | 0.95 | 75 | 0.93 | 0.89 | 0.95 | 80 | 0.94 | 0.91 | 0.96 |
| AMA | 155 | 0.81 | 0.75 | 0.86 | 75 | 0.89 | 0.83 | 0.92 | 80 | 0.73 | 0.61 | 0.82 |
| mLDFA | 155 | 0.87 | 0.85 | 0.91 | 75 | 0.83 | 0.75 | 0.89 | 80 | 0.98 | 0.96 | 0.98 |
| JLCA | 150 | 0.79 | 0.72 | 0.84 | 74 | 0.49 | 0.25 | 0.66 | 76 | 0.47 | 0.23 | 0.65 |
| mMPTA | 155 | 0.86 | 0.82 | 0.89 | 75 | 0.82 | 0.73 | 0.88 | 80 | 0.93 | 0.88 | 0.96 |
| mLDTA | 155 | 0.95 | 0.92 | 0.96 | 75 | 0.95 | 0.92 | 0.97 | 80 | 0.94 | 0.91 | 0.97 |
| HKA | 155 | 0.99 | 0.99 | 0.99 | 75 | 0.99 | 0.99 | 0.99 | 80 | 1 | 0.99 | 1 |
| Mikulicz line | 142 | 0.78 | 0.32 | 0.9 | 69 | 0.95 | 0.83 | 0.98 | 73 | 0.69 | 0.03 | 0.89 |
| n | Kappa | 95% CI | n | Kappa | 95% CI | n | Kappa | 95% CI | ||||
| Leg Axis | 153 | 0.92 | 0.83 | 1.01 | 75 | 0.93 | 0.8 | 1.06 | 78 | 0.9 | 0.77 | 1.02 |
ICC: Intraclass Correlation Coefficient, CI: Confidence Interval.