Table 3.
Intra- and Inter-reader Reliability APPROACH MOAKS Assessment (Change)
| N = 20 | Intra-observer | Inter-observer | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Weighted Kappa | Std. Error | 95% CI | Weighted Kappa | Std. Error | 95% CI | ||||
| Maximum increase in MOAKS cartilage score | MFTJ | 0.67 | 0.17 | 0.34 | 1.01 | 0.37 | 0.24 | -0.10 | 0.84 |
| LFTJ | 1.00 | 0.00 | 1.00 | 1.00 | 0.68 | 0.23 | 0.22 | 1.14 | |
| PFJ | 0.58 | 0.20 | 0.19 | 0.97 | 0.38 | 0.22 | -0.05 | 0.81 | |
| Knee | 0.73 | 0.16 | 0.43 | 1.04 | 0.56 | 0.19 | 0.19 | 0.92 | |
| Maximum increase in cartilage area score | MFTJ | 0.64 | 0.33 | 0.01 | 1.28 | 0.36 | 0.29 | -0.20 | 0.93 |
| LFTJ | 1.00 | 0.00 | 1.00 | 1.00 | 0.64 | 0.33 | 0.01 | 1.28 | |
| PFJ | 0.63 | 0.20 | 0.24 | 1.01 | 0.41 | 0.21 | -0.01 | 0.83 | |
| Knee | 0.76 | 0.16 | 0.45 | 1.07 | 0.56 | 0.21 | 0.14 | 0.97 | |
| Maximum increase in cartilage full thickness score | MFTJ | 0.76 | 0.16 | 0.45 | 1.07 | 0.47 | 0.22 | 0.04 | 0.90 |
| LFTJ | 1.00 | 0.00 | 1.00 | 1.00 | 0.72 | 0.21 | 0.31 | 1.12 | |
| PFJ | 0.48 | 0.25 | -0.02 | 0.98 | 0.32 | 0.30 | -0.27 | 0.90 | |
| Knee | 0.74 | 0.15 | 0.46 | 1.03 | 0.65 | 0.16 | 0.33 | 0.97 | |
| Maximum increase in BML size score | MFTJ | 0.76 | 0.17 | 0.43 | 1.10 | 0.54 | 0.15 | 0.23 | 0.84 |
| LFTJ | 0.88 | 0.13 | 0.62 | 1.13 | 0.77 | 0.18 | 0.42 | 1.12 | |
| PFJ | 0.48 | 0.25 | -0.02 | 0.98 | 0.23 | 0.26 | -0.29 | 0.75 | |
| Knee | 0.87 | 0.10 | 0.68 | 1.06 | 0.79 | 0.10 | 0.60 | 0.99 | |
| Change in number of regions with BML score > 0 | MFTJ | 0.63 | 0.23 | 0.18 | 1.08 | 0.52 | 0.22 | 0.08 | 0.96 |
| LFTJ | 0.65 | 0.27 | 0.12 | 1.18 | 0.53 | 0.17 | 0.20 | 0.87 | |
| PFJ | 0.79 | 0.21 | 0.38 | 1.19 | 0.47 | 0.32 | -0.15 | 1.09 | |
| Knee | 0.55 | 0.22 | 0.13 | 0.98 | 0.57 | 0.17 | 0.24 | 0.89 | |
| Maximum increase in osteophyte score | MFTJa | n/a | n/a | n/a | n/a | n/a | n/a | n/a | n/a |
| LFTJ | 0.64 | 0.33 | 0.01 | 1.28 | 1.00 | 0.00 | 1.00 | 1.00 | |
| PFJ | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | |
| Knee | 0.46 | 0.31 | -0.14 | 1.06 | 0.61 | 0.25 | 0.11 | 1.10 | |
| Max increase in meniscus morphology score (range 0…8) | MFTJ | 0.84 | 0.11 | 0.62 | 1.06 | 0.84 | 0.17 | 0.52 | 1.17 |
| LFTJ | 0.63 | 0.29 | 0.07 | 1.19 | 0.24 | 0.20 | -0.14 | 0.63 | |
| Max increase in meniscus extrusion (range 0…3) | MFTJ | 1.00 | 0.00 | 1.00 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| LFTJ | 0.00 | 0.00 | 0.00 | 0.00 | 0.79 | 0.23 | 0.33 | 1.25 | |
| Max increase in hoffa synovitis | Knee | 0.64 | 0.33 | 0.00 | 1.28 | 0.31 | 0.30 | -0.27 | 0.90 |
| Max increase in effusion synovitis | Knee | 0.85 | 0.11 | 0.64 | 1.06 | 0.44 | 0.16 | 0.14 | 0.75 |
MFTJ medial tibio-femoral joint, LFTJ lateral tibio-femoral joint, PFJ Patellofemoral joint, Std standard
aIn none of the knees an increase in osteophyte size in the medial tibio-femoral joint (MFTJ) was observed (both readers)