Interobserver agreement in round 1 and round 2
| Question | Statistical parameter | Round 1 | Round 2 |
| Ordinal analysis including all categories | Kendall’s W | 0.796 | 0.804 |
| Ordinal analysis of 3 categories <1% vs 1%–10% vs >10% | Kendall’s W | 0.768 | 0.764 |
| Binary analysis using one as cut-off (0 vs all others (≥1%)) | Kappa | 0.650 (0.559, 0.740) | 0.590 (0.499, 0.681) |
| Binary analysis using 10% as cut-off (0%–10% vs >10%) | Kappa | 0.569 (0.468, 0.670) | 0.549 (0.451, 0.647) |