Table 2.
CPAK measurements (Mean ± SD) and comparisons between observers, and between LLRmean and both navigation data wear assumptions
| MPTA | LDFA | JLO | aHKA | ||
|---|---|---|---|---|---|
| Measurements | LLR1 | 87.8 ± 3.1 | 86.8 ± 2.3 | 174.5 ± 3.3 | 1 ± 4.3 |
| LLR2 | 87.4 ± 3.1 | 86.8 ± 2.1 | 174.2 ± 3.3 | 0.6 ± 4.2 | |
| LLRmean | 87.6 ± 3.1 | 86.8 ± 2.2 | 174.4 ± 3.3 | 0.8 ± 4.2 | |
| Navlit | 87.6 ± 3.1 | 87.4 ± 1.9 | 175.0 ± 3.4 | 0.3 ± 3.8 | |
| Navopt | 87.7 ± 3.4 | 86.9 ± 2.2 | 174.5 ± 3.4 | 0.8 ± 4.6 | |
|
LLR Interobserver LLR1 vs. LLR2 |
ICC | 0.963 | 0.955 | 0.952 | 0.965 |
| MAE | 0.7 | 0.5 | 0.8 | 1.0 | |
| t-test | 0.52 | 0.86 | 0.63 | 0.57 | |
| F-test | 0.90 | 0.62 | 0.88 | 0.77 | |
|
Literature Based Navlit vs. LLRmean |
Error | -0.1 ± 2.6 | -0.6 ± 1.7 | -0.6 ± 2.9 | 0.5 ± 3.4 |
| ICC | 0.641 | 0.647 | 0.636 | 0.642 | |
| MAE | 2.0 | 1.4 | 2.1 | 2.7 | |
| t-test | 0.94 | 0.11 | 0.29 | 0.48 | |
| F-test | 0.58 | 0.77 | 0.75 | 0.76 | |
|
Optimized Navopt vs. LLRmean |
Error | -0.1 ± 2.5 | -0.1 ± 1.6 | -0.1 ± 2.9 | 0 ± 3.1 |
| ICC | 0.703 | 0.734 | 0.641 | 0.755 | |
| MAE | 1.9 | 1.3 | 2.2 | 2.5 | |
| t-test | 0.90 | 0.83 | 0.83 | 0.99 | |
| F-test | 0.53 | 0.79 | 0.74 | 0.53 |