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

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

Comparisona VD SVC
Thickness ILM-IPL
VD SVC
Thickness ILM-RPE
VD DVC
Thickness IPL-RPE
VD DVC
Thickness ILM-RPE
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
  1. a Correlations between various analyzed parameters were calculated using the Pearson test or Spearman rank test, according to the normality of the distribution