Table 1.
Comparison of film vs. digital grading for variables of distance and area of CMV retinitis (N=48)
| Variables | N* | Digital images Mean(SD) |
Film images Mean (SD) |
Mean absolute difference (95% CI) |
Mean Difference (95% CI) |
p value |
|---|---|---|---|---|---|---|
| Distance to Disc (DD) | 14 | 2.89 (2.52) | 2.87 (2.62) | 0.16 (0.08, 0.25) | 0.02 (−0.11, 0.15) | 0.29 |
| Distance to macula (DD) | 14 | 3.70 (2.51) | 3.74 (2.68) | 0.17 (0.04, 0.30) | −0.04 (−0.21, 0.12) | 0.98 |
| Area of CMV retinitis (DA) | 15 | 44.08 (26.34) | 43.13 (26.04) | 1.77 (0.85, 2.68) | 0.95 (−0.30, 2.20) | 0.13 |
*
Includes images with gradable CMV retinitis only.
DD-disc diameter, DA- disc area, p value – Wilcoxon signed rank test