Interobserver grading agreement on quantitative OCT evaluations
| Variable | Statistic | Grader 1 | Grader 2 | Paired difference | P value |
| DSM height (μm) | N | 6 | |||
| Mean (SD) | 123.8 (71.1) | 123.7 (71.3) | 0.17 (0.41) | 0.363 | |
| Min, median, max | 57, 101.5, 215 | 56, 101.5, 215 | 0, 0, 1 | ||
| ICC (95% CI) | 1.00 (1.00 to 1.00) | ||||
| Subfoveal choroidal thickness (μm) | N | 548 | |||
| Mean (SD) | 174.4 (69.9) | 168.6 (68.3) | 5.74 (25.89) | <0.001 | |
| Min, median, max | 42, 172.5, 371 | 42, 166, 400 | −198, 0, 201 | ||
| ICC (95% CI) | 0.93 (0.91 to 0.94) | ||||
| Choroidal thickness at nasal 1 mm (μm) | N | 548 | |||
| Mean (SD) | 156.2 (67.8) | 151.9 (65.6) | 4.29 (20.88) | <0.001 | |
| Min, median, max | 21, 154, 371 | 21, 150, 347 | −178, 0, 204 | ||
| ICC (95% CI) | 0.95 (0.94 to 0.96) | ||||
| Choroidal thickness at temporal 1 mm (μm) | N | 548 | |||
| Mean (SD) | 174.7 (65.8) | 167.3 (64.9) | 7.43 (27.85) | ||
| Min, median, max | 44, 175, 362 | 44, 166.5, 418 | −210, 0, 187 | <0.001 | |
| ICC (95% CI) | 0.90 (0.89 to 0.92) |
DSM, dome-shaped macula; ICC, intraclass correlation; OCT, optical coherence tomography.