Interobserver variability statistics for left eyes
| Stereoscopic interobserver measures | Monoscopic interobserver measures | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean difference between measures | SD of difference | t test p value | Range of CDR | 95% TC (% of range) | ICC | >0.2 CDR difference | Mean difference between measures | SD of difference | t test p value | Range of CDR | 95% TC (% of range) | ICC | >0.2 CDR difference | ||
| H-CDR | 0.043 | 0.088 | 0.000 | 0.58 | 30 | 0.58 | 5 [5%] | 0.047 | 0.076 | 0.000 | 0.51 | 29 | 0.60 | 5 [5%] | |
| V-CDR | −0.0003 | 0.074 | 0.969 | 0.61 | 24 | 0.84 | 1 [1%] | 0.0023 | 0.055 | 0.662 | 0.56 | 19 | 0.88 | 0 | |
| A-CDR | 0.023 | 0.087 | 0.008 | 0.67 | 26 | 0.79 | NA | 0.031 | 0.078 | 0.000 | 0.67 | 23 | 0.80 | NA | |
| P-CDR | 0.010 | 0.066 | 0.108 | 0.55 | 23 | 0.80 | NA | 0.018 | 0.053 | 0.001 | 0.5 | 21 | 0.82 | NA | |
TC = tolerance for change; V-CDR = vertical cup-disc ratio; H-CDR = horizontal cup-disc ratio; A-CDR = area cup-disc ratio; P-CDR = perimeter cup-disc ratio; ICC = intraclass correlation coefficient.