Evaluating imaging repeatability of fully self-service fundus photography within a community-based eye disease screening setting

Table 4 Comparison of the extent of variation of indicators between the two groups (multivariate analysis)

Indicator	Effect value^a,b	Standard error	P-value
Vascular fractal dimension	− 0.0006	0.0023	0.78
Average vascular curvature	0	0	0.58
Mean vascular curvature within 0.5–1.0PD	0.0072	0.0206	0.73
CRAE within 0.5PD–1.0PD	0.0219	0.0169	0.20
PRAE within 1.5PD–2.0PD	− 0.0123	0.0102	0.23
CRVE within 0.5PD–1.0PD	0.0030	0.0113	0.79
PRVE within 1.5PD–2.0PD	0.0173	0.0134	0.20
CAVR within 0.5PD–1.0PD	0.0220	0.0174	0.21
PAVR within 1.5PD–2.0PD	0.0058	0.0149	0.70
Optic disc area (µm²)	− 0.0075	0.0056	0.18
Optic disc horizontal diameter (µm)	− 0.0025	0.0032	0.42
Optic disc vertical diameter (µm)	− 0.0044	0.0026	0.09
Optic cup area (µm²)	− 0.0484	0.0326	0.14
Optic cup horizontal diameter (µm)	− 0.0305	0.0207	0.14
Optic cup vertical diameter (µm)	− 0.0240	0.0133	0.07

^aAdjusting age and gender
^bEffect value = Traditional fundus photography group—fully self-service fundus photography group

ISSN: 1475-925X