Wide-field swept-source OCT angiography of the periarterial capillary-free zone before and after anti-VEGF therapy for branch retinal vein occlusion

Table 4 Simple regression analysis of baseline P/A ratios with central retinal thickness, best-corrected visual acuity, and their improvement at 3, 6, 12 months of the follow-up

Variables	P/A ratio in the first-order artery		P/A ratio in the second-order artery
Variables	r	P	r	P
Baseline CRT	0.366	0.006	0.377	0.005
CRT improvement
At 3 months	0.302	0.027	0.310	0.023
At 6 months	0.312	0.021	0.307	0.024
At 12 months	0.366	0.007	0.363	0.006
Baseline BCVA	− 0.370	0.005	− 0.380	0.004
BCVA improvement
At 3 months	− 0.677	< 0.001	− 0.682	< 0.001
At 6 months	− 0.304	0.026	− 0.287	0.036
At 12 months	− 0.437	0.001	− 0.445	< 0.001

P/A = paCFZ area to artery area; CRT = central retinal thickness; BCVA = best-corrected visual acuity; ETDRS = Early Treatment Diabetic Retinopathy Study

ISSN: 2326-0254