Quantitative analysis of retinal vessel density and thickness changes in diabetes mellitus evaluated using optical coherence tomography angiography: a cross-sectional study

Table 5 Comparing the correlation between Vessel Density and Thickness in perifoveal

Comparison^a	VD SVC Thickness ILM-IPL		VD SVC Thickness ILM-RPE		VD DVC Thickness IPL-RPE		VD DVC Thickness ILM-RPE
Comparison^a	r value	P value	r value	P value	r value	P value	r value	P value
Control	0.509	< 0.0001	0.3886	< 0.0001	0.0656	0.4039	−0.0381	0.6285
DM	0.2736	0.0004	0.164	0.0376	−0.0814	0.3049	−0.1063	0.1798
No DR	0.4326	< 0.0001	0.3276	0.0019	0.031	0.7758	0.0684	0.529
Mild NPDR	0.5237	0.0004	0.4614	0.0024	0.1828	0.2527	0.2056	0.1972
Moderate NPDR	0.5136	0.1061	0.286	0.3939	0.0182	0.9676	0.0091	0.9892
Severe NPDR	0.4588	0.2529	0.4965	0.2108	0.2664	0.5236	0.4892	0.2186
NPDR	0.216	0.0974	0.0765	0.5611	0.0834	0.5263	0.1813	0.1657
PDR	0.077	0.7937	0.1373	0.6397	0.0745	0.8003	0.0465	0.8746
DR	0.175	0.1358	0.032	0.7866	0.0582	0.6221	0.135	0.2515

^a Correlations between various analyzed parameters were calculated using the Pearson test or Spearman rank test, according to the normality of the distribution

ISSN: 1471-2415