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Table 1 Vessel density (ratio) of the superficial and deep retinal layer in 3 different sessions

From: Impact of image quality on OCT angiography based quantitative measurements

 

1st session

2nd session

3rd session

IQI

 

P value

ICC

SRL

0.408 ± 0.012

0.410 ± 0.011

0.397 ± 0.020

72

1st vs 2nd session

0.4

0.807

     

1st vs 3rd session

0.04

0.338

DRLa

0.394 ± 0.022

0.383 ± 0.014

0.447 ± 0.028

73.18

1st vs 2nd session

0.064

0.525

     

1st vs 3rd session

<0.001

0.063

DRLb

0.132 ± 0.007

0.128 ± 0.008

0.148 ± 0.014

52.29

1st vs 2nd session

0.071

0.660

     

1st vs 3rd session

<0.001

0.368

  1. SRL superficial retinal layer, IQI image quality index, ICC intraclass correlation coefficient
  2. a DRL deep retinal layer without artefact removal
  3. b DRL deep retinal layer with artefact removal