Table 4 Comparisons of foveal avascular area metrics among groups with a signal strength (SS) from 7 to 10.

From: The Importance of Signal Strength in Quantitative Assessment of Retinal Vessel Density Using Optical Coherence Tomography Angiography

 

SS 7 (n = 94)

SS 8 (n = 162)

SS 9 (n = 125)

SS 10 (n = 65)

p-value*

p-value†

p-value‡

p-value§

Area (mean ± SD, mm2)

0.082 ± 0.066

0.161 ± 0.100

0.231 ± 0.107

0.250 ± 0.097

 < 0.001

 < 0.001

 < 0.001

0.237

Perimeter (mean ± SD, mm)

1.095 ± 0.724

1.655 ± 0.648

2.072 ± 0.654

2.081 ± 0.541

 < 0.001

 < 0.001

 < 0.001

0.324

Circularity (mean ± SD)

0.508 ± 0.276

0.616 ± 0.183

0.666 ± 0.131

0.689 ± 0.126

 < 0.001

 < 0.001

0.319

0.535

  1. Mean ± standard deviation.
  2. *The p-value was obtained from the one-way analysis of variance.
  3. †The p-value was obtained from the post-hoc test (Bonferroni) between the SS 7 and SS 8 groups.
  4. ‡The p-value was obtained from the post-hoc test (Bonferroni) between the SS 8 and SS 9 groups.
  5. §The p-value was obtained from the post-hoc test (Bonferroni) between the SS 9 and SS 10 groups.
  6. Boldface numbers indicate statistically significant differences at p < 0.05.
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