| Observer A (Screws/%) | Observer B (Screws/%) | Observer C (Screws/%) | Mean(Screws/%) | |
|---|---|---|---|---|
| No breach | 431/91.7 | 426/90.64 | 425/90.43 | 427.33/90.92 |
| Minor breach (≤2 mm) | 36/7.66 | 40/8.51 | 42/8.94 | 39.33/8.37 |
| Major breach (≥3 mm) | 3/0.64 | 4/0.85 | 3/0.64 | 3.33/0.71 |
| Kappa | Observer A-B κ=0.769 Observer B-C κ=0.928 Observer A-C κ=0.784 | |||