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Table 3 Intraclass correlation coefficient (ICC) for reliability analysis of foveal avascular zone (FAZ) measurements

From: Reliability of foveal avascular zone measurements in eyes with retinal vein occlusion using optical coherence tomography angiography

Rating ICC 95% conf. interval
Interrater reliability
 Individual 0.62 0.41 0.79
 Average 0.83 0.67 0.92
Intrarater reliability
 A 0.92 0.82 0.96
 B 0.96 0.91 0.98
 C 0.88 0.76 0.94
Interrater reliability—type of occlusion
 Central vein occlusion*
  Individual 0.75 0.51 0.90
  Average 0.90 0.76 0.96
 Branch vein occlusion**
  Individual 0.48 0.12 0.80
  Average 0.74 0.29 0.92
Interrater reliability—presence of edema
 Macular edema
  Individual 0.62 0.36 0.82
  Average 0.83 0.63 0.93
 Without macular edema
  Individual 0.58 0.11 0.90
  Average 0.81 0.28 0.96
Intrarater reliability—type of occlusion
 Central vein occlusion
  A 0.91 0.75 0.97
  B 0.99 0.96 0.99
  C 0.94 0.81 0.98
 Branch vein occlusion
  A 0.93 0.75 0.98
  B 0.94 0.80 0.98
  C 0.79 0.40 0.94
Intrarater reliability—presence of edema
 Macular edema
  A 0.91 0.78 0.97
  B 0.93 0.83 0.97
  C 0.87 0.69 0.95
 Without macular edema
  A 0.91 0.57 0.98
  B 0.98 0.87 0.99
  C 0.90 0.53 0.98
  1. p < 0.001, *p < 0.001, **p < 0.05