Table 3 Pearson’s correlation analysis results of various clinical factors and repeatability parameters of optical coherence tomography angiography measurements

From: Factors Affecting Repeatability of Assessment of the Retinal Microvasculature Using Optical Coherence Tomography Angiography in Healthy Subjects

 

VD, 6-mm area

PD, 6-mm area

FAZ

Absolute difference

CV

Absolute difference

CV

Absolute difference

CV

r

p-value

r

p-value

r

p-value

R

p-value

r

p-value

r

p-value

Age

−0.132

0.118

−0.172

0.058

−0.153

0.070

−0.159

0.078

0.166

0.070

0.053

0.538

BCVA (logMAR)

0.090

0.349

0.108

0.260

0.057

0.553

0.080

0.402

0.050

0.605

0.104

0.277

IOP

−0.049

0.616

−0.051

0.597

−0.053

0.583

−0.054

0.577

0.005

0.961

0.033

0.733

Spherical equivalent

0.111

0.249

0.122

0.208

0.099

0.306

0.107

0.266

0.155

0.108

0.162

0.094

Axial length

−0.043

0.661

−0.055

0.570

−0.047

0.626

−0.058

0.548

−0.116

0.234

−0.133

0.169

CMT

0.082

0.336

0.076

0.368

0.081

0.337

0.078

0.355

−0.154

0.068

−0.005

0.950

VD, 1-mm area*

−0.310

<0.001

−0.352

<0.001

−0.308

<0.001

−0.350

<0.001

−0.296

<0.001

−0.221

0.009

VD, 6-mm area*

−0.540

<0.001

−0.631

<0.001

−0.533

<0.001

−0.628

<0.001

−0.115

0.173

−0.326

<0.001

FAZ*

−0.141

0.099

−0.172

0.044

−0.137

0.109

−0.173

0.043

0.336

<0.001

−0.137

0.111

Signal strength*

−0.331

<0.001

−0.384

<0.001

−0.335

<0.001

−0.393

<0.001

−0.281

0.002

−0.263

0.007

  1. VD = vessel density; PD = perfusion density; FAZ = foveal avascular zone; BCVA = best-corrected visual acuity; IOP = intraocular pressure; CMT = central macular thickness; CV = coefficient of variation.
  2. *The average values in two consecutive angiography scans were subjected to correlation analysis.
  3. Boldface numbers indicate statistically significant differences at p < 0.05.
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