Table 2.
Variance of axis location and interobserver reliability
| Axis | Mean absolute difference from mean measurement (°) | |||||
|---|---|---|---|---|---|---|
| Two-dimensional angles | Three-dimensional angles | |||||
| TEA | CA | p value* | TEA | CA | p value* | |
| Femoral mechanical axis | 1.6 ICC = 0.83 |
1.0 ICC = 0.56 |
0.07 | 2.4 ICC = 0.83 |
1.9 ICC = 0.56 |
0.23 |
| Tibial mechanical axis | 2.1 ICC = 0.86 |
1.1 ICC = 0.70 |
0.05 | 2.4 ICC = 0.83 |
1.5 ICC = 0.72 |
0.15 |
* Levene’s tests used to compare variances; TEA = transepicondylar axis; CA = cylindrical axis; ICC = intraclass correlation coefficient.