Table 2 Comparison of the absolute differences between the two groups, Mean (SD)
Indicator | Fully self-service fundus photography (n = 34) | Traditional fundus photography (n = 31) | Total (n = 65) | P value* |
|---|---|---|---|---|
Vascular fractal dimension | 0.02 (0.01) | 0.02 (0.01) | 0.02 (0.01) | 0.51 |
Average vascular curvature | 0.000035 (0.000029) | 0.000029 (0.000028) | 0.000032 (0.000029) | 0.37 |
Mean vascular curvature within 0.5–1.0PD | 0.000053 (0.00004) | 0.000059 (0.00006) | 0.000056 (0.00005) | 0.94 |
CRAE within 0.5PD-1.0PD | 6.83 (5.59) | 8.98 (7.69) | 7.86 (6.71) | 0.35 |
PRAE within 1.5PD-2.0PD | 6.75 (5.5) | 5.37 (4.04) | 6.09 (4.87) | 0.36 |
CRVE within 0.5PD-1.0PD | 10.12 (10.55) | 10.47 (9.27) | 10.29 (9.88) | 0.65 |
PRVE within 1.5PD-2.0PD | 11.85 (8.7) | 16.31 (17.64) | 13.98 (13.78) | 0.46 |
CAVR within 0.5PD-1.0PD | 0.04 (0.03) | 0.04 (0.04) | 0.04 (0.03) | 0.38 |
PAVR within 1.5PD-2.0PD | 0.04 (0.03) | 0.04 (0.03) | 0.04 (0.03) | 1.00 |
Optic disc area (µm2) | 59,252.59 (57,117.05) | 45,037.68 (41,889.9) | 52,473.17 (50,555.85) | 0.27 |
Optic disc horizontal diameter (µm) | 24.19 (24.1) | 20.22 (15.82) | 22.3 (20.52) | 0.80 |
Optic disc vertical diameter (µm) | 28.8 (20.65) | 21.12 (14.04) | 25.13 (18.09) | 0.14 |
Optic cup area (µm2) | 55,410.38 (63,169.78) | 44,722.35 (42,611.64) | 50,313.02 (54,199.98) | 0.82 |
Optic cup horizontal diameter (µm) | 57.56 (72.77) | 42.49 (42.72) | 50.37 (60.36) | 0.55 |
Optic cup vertical diameter (µm) | 45.67 (43.48) | 32.7 (29.93) | 39.48 (37.91) | 0.20 |