Table 2.
Intra-rater and inter-rater reliability of ankle radiograph scoring by three musculoskeletal radiologists.
| Mortise View | All Views | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Ankle OST | Ankle JSN | KL | ||||||||
| Tibia (med) | Tibia (lat) | Talus (med) | Talus (lat) | Distal Fibula | TTJ (med) | TTJ (superior) | TFJ (lat) | All Joints | ||
| Rater | Atlas Figure | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 18–20 |
| A | Intra-rater κ | 0.72 | 0.46 | 0.78 | 0.81 | 0.83 | 0.94 | 1 | 0.77 | 0.91 |
| B | 0.57 | 0.5 | 0.64 | 0.39 | 0.28 | 0.56 | 0.64 | 0.69 | 0.58 | |
| C | 0.29 | 0.58 | 0.56 | 0.24 | 0.17 | 0.15 | 0.8 | 0.36 | 0.37 | |
| A, B, C (min/max) | Inter-rater κ | 0.17/0.54 | 0.52/0.54 | 0.21/0.40 | 0.21/0.35 | 0.17/0.71 | 0.24/0.37 | 0.47/0.86 | 0.27/0.36 | 0.22/0.40 |
| Lateral View | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Ankle OST | Subtalar OST | Ankle JSN | Subtalar JSN | ||||||
| Tibia (ant) | Tibia (post) | Talus (ant) | Talus (post) | Talus (post) | TTJ (ant) | TTJ (post) | STJ | ||
| Rater | Atlas Figure | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| A | Intra-rater κ | 0.69 | 0.88 | 0.79 | 0.76 | 0.79 | 0.88 | 0.85 | 0.84 |
| B | 0.65 | 0.89 | 0.66 | 0.80 | 0.48 | 0.59 | 0.79 | 0.64 | |
| C | 0.63 | 0.28 | 0.74 | 0.47 | 0.66 | 0.59 | 0.49 | 0.53 | |
| A, B, C (min/max) | Inter-rater κ | 0.45/0.72 | 0.37/0.71 | 0.47/0.56 | 0.34/0.47 | 0.27/0.36 | 0.12/0.48 | 0.23/0.58 | 0.09/0.46 |
TTJ=tibiotalar joint; STJ=subtalar joint; TFJ=talofibular joint; KL=Kellgren-Lawrence grade; OST=osteophyte; JSN=joint space narrowing med=medial; lat=lateral; ant=anterior; post=posterior