Stereoscopic-monoscopic intermethod (intraobserver) variability statistics for right eyes
| Observer 1 | Observer 2 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | −0.020 | 0.068 | 0.006 | 0.39 | 34 | 0.60 | 1 [1%] | 0.014 | 0.063 | 0.040 | 0.46 | 27 | 0.73 | 1 [1%] | |
| V-CDR | −0.029 | 0.058 | 0.000 | 0.46 | 25 | 0.83 | 1 [1%] | 0.011 | 0.065 | 0.105 | 0.47 | 27 | 0.82 | 1 [1%] | |
| A-CDR | −0.035 | 0.077 | 0.000 | 0.53 | 28 | 0.78 | NA | 0.018 | 0.071 | 0.015 | 0.57 | 25 | 0.83 | NA | |
| P-CDR | −0.026 | 0.055 | 0.000 | 0.38 | 28 | 0.76 | NA | 0.011 | 0.054 | 0.056 | 0.42 | 25 | 0.81 | 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.