TABLE 2.
KAPPA STATISTICS FOR INTRAOBSERVER AGREEMENT FOR THE RETINAL HEMORRHAGE TOOL*
| CATEGORY | KAPPA (95% CI)[% AGREEMENT] | ||
|---|---|---|---|
| ZONE A | ZONE B | ZONE C | |
| Number of hemorrhages | 0.68 (0.47, 0.89) [82.5] | 0.65 (0.47, 0.83) [75.0] | 0.67 (0.49, 0.86) [82.5] |
| Retinoschisis | 0.50 (0.25, 0.75) [77.5] | 0.65 (0.42, 0.87) [82.5] | 0.70 (0.44, 0.96) [90.0] |
| Superficial intraretinal hemorrhages | 0.53 (0.30, 0.77) [80.0] | 0.67 (0.44, 0.90) [85.0] | 0.71 (0.50, 0.91) [85.0] |
| Deeper intraretinal hemorrhages | 0.39 (0.20, 0.58) [65.0] | 0.75 (0.49, 1.01) [92.5] | 0.77 (0.58, 0.96) [90.0] |
| Pre-retinal/subhyaloid hemorrhage | 0.53 (0.17, 0.88) [82.5] | 0.65 (0.40, 0.90) [87.5] | 0.73 (0.57, 0.89) [80.0] |
| Vitreous hemorrhage | −0.05 (−0.20, 0.10) [87.5] | 0.03 (−0.12, 0.17) [92.5] | 0.72 (0.44, 0.99) [92.5] |
| Subretinal hemorrhage | 0.03 (−0.15, 0.21) [72.5] | 0.77 (0.55, 0.98) [90.0] | 0.59 (0.40, 0.78) [75.0] |
CI, confidence interval.
*
Zone D was not tested for intrarater agreement as none of the selected images for this analysis demonstrated zone D.