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Intra-rater Reliability
| ICC (95% CI) | Kappa (95% CI) | Cronbach alpha | Reliability | |
|---|---|---|---|---|
| Each grade individually (0, 1, 2) | N/A | 0.49 (0.41–0.57) | N/A | Low/moderate |
| Summed grade by level and side | 0.77 (0.60–0.87) | N/A | 0.87 | High |
| Summed grades by individual | 0.88 (0.22–0.99) | N/A | 0.93 | High |
| Number of grade ‘2’ scores | 0.84 | N/A | 0.92 | High |
