Table 2.

Pearson correlation analysis of the pre-operative and post-operative BCVA and Optical Coherence Tomography Angiography Parameters in Patients with Epiretinal Membrane

	BCVA, logMAR
	Pre-operative		Post-operative
	Pearson r value	P value	Pearson r value	P value
SCP
FAZ area (mm2)	0.13	0.61	−0.53	0.0014*
Foveal VDs (%)	−0.19	0.42	0.30	0.28
Parafoveal VDs (%)	0.16	0.52	0.11	0.69
DCP
Foveal VDs (%)	−0.36	0.13	−0.075	0.79
Parafoveal VDs (%)	−0.15	0.54	0.27	0.34
OCP
Outer retina flow area (mm2)	0.25	0.30	−0.31	0.25
Foveal VDs (%)	0.32	0.19	−0.071	0.80
Parafoveal VDs (%)	0.083	0.74	−0.10	0.72
CCP
Choroid flow area (mm2)	−0.20	0.42	0.13	0.63
Foveal VDs (%)	−0.20	0.42	0.18	0.53
Parafoveal VDs (%)	0.0082	0.97	0.13	0.64
Thickness measured at foveal centre, µm
Total	0.73	<0.0001*	0.59	0.0003*
Inner retina	0.51	0.0032*	0.48	0.0045*
Outer retina	0.25	0.31	0.49	0.062
Thickness measured at parafovea, µm
Total	0.38	0.033*	0.80	<0.0001*
Inner retina	0.70	<0.0001*	0.42	0.015*
Outer retina	0.27	0.26	0.33	0.24

OCTA opticalcoherence tomography angiography, ERM epiretinal membrane,

BCVA best-corrected visual acuity, SCP superficial capillary plexus, FAZ foveal avascular zone, VDs vessel densities, DCP deep capillary plexus, OCP outer retinal capillary plexus, CCP choroidal capillary plexus

*The value was statistically significant (P < 0.05)