Inter-rater Krippendorff’s alpha correlation for 20 facets of the Sim-OSSCAR
| Item | Krippendorff’s alpha | Per cent agreement | |
| 1 | Globe stabilisation | 0.902 | 0.934 |
| 2 | Conjunctival peritomy | 0.666 | 0.792 |
| 3 | Scleral incision | 0.895 | 0.938 |
| 4 | Corneal groove(s) | 0.782 | 0.875 |
| 5 | Paracentesis | 0.880 | 0.934 |
| 6 | Formation of scleral flap | 0.782 | 0.875 |
| 7 | Releasable suture | 0.755 | 0.854 |
| 8 | Fixed/releasable suture | 0.635 | 0.750 |
| 9 | Corneal incision into AC | 0.665 | 0.771 |
| 10 | Sclerostomy | 0.796 | 0.875 |
| 11 | Peripheral iridectomy | 0.782 | 0.875 |
| 12 | Reformation of AC | 1.000 | 1.000 |
| 13 | Conjunctival suturing | 0.696 | 0.792 |
| 14 | Suture burying | 0.673 | 0.792 |
| Global indices | |||
| 15 | Tissue handling | 0.787 | 0.854 |
| 16 | Surgical field positioned centrally within microscope view | 0.512 | 0.667 |
| 17 | Needle holding | 0.665 | 0.771 |
| 18 | Knot tying | 0.639 | 0.771 |
| 19 | Overall fluidity of procedure | 0.743 | 0.854 |
| 20 | Overall speed of procedure | 1.000 | 1.000 |
AC, anterior chamber; Sim-OSSCAR, ophthalmic simulated surgical competency assessment rubric.