Table 3.

Intra-visit and inter-visit coefficient of variation for measurement of vessel density in healthy eyes and eyes with retinal diseases

		Intra-visit coefficient of variation (%)			Inter-visit coefficient of variation
Scan Size	Sector	Normal eyes (%)	Diseased eyes (%)	P value	Normal eyes (%)	Diseased eyes (%)	P value
3×3 mm	Whole macular area	2.6	3.7	0.01	3.2	4.1	0.06
	Central Fovea	4.9	6.8	0.01	5.1	6.8	0.03
	Para-foveal circle	2.6	3.7	0.01	3.3	4.0	0.13
	Para-fovea_superior hemifield	3.1	3.3	0.48	4.0	4.0	0.93
	Para-fovea_inferior hemifield	2.4	4.3	<0.001	2.9	4.3	0.004
	Para-fovea_temporal sector	3.1	4.7	0.002	3.2	4.9	0.002
	Para-fovea_superior sector	3.5	3.6	0.79	4.5	4.0	0.28
	Para-fovea_nasal sector	3.4	3.4	0.97	3.9	5.2	0.02
	Para-fovea_inferior sector	2.1	4.4	<0.001	3.4	4.4	0.05
6×6 mm	Whole macular area	2.6	4.0	0.001	3.8	5.1	0.01
	Central Fovea	5.5	7.4	0.02	6.4	10.4	<0.001
	Para-foveal circle	3.8	4.9	0.05	6.5	6.4	0.93
	Para-fovea_superior hemifield	4.3	4.9	0.28	6.6	6.3	0.74
	Para-fovea_inferior hemifield	3.6	5.2	0.004	6.6	6.8	0.81
	Para-fovea_temporal sector	3.9	4.6	0.18	6.9	6.8	0.96
	Para-fovea_superior sector	4.9	5.8	0.16	7.2	6.6	0.55
	Para-fovea_nasal sector	4.0	6.8	<0.001	5.8	7.8	0.02
	Para-fovea_inferior sector	4.6	5.6	0.12	7.5	7.4	0.91