Table 4 Correlation between visual acuity and parameters obtained using optical coherence tomography angiography in the analysable RP group (n = 68).

From: Optical Coherence Tomography Angiography to Estimate Retinal Blood Flow in Eyes with Retinitis Pigmentosa

 

Univariate analysis

Multivariate analysis

P

r

P

β

Age (years)

0.17

—

—

—

Parafoveal flow density (%)

Superficial

<0.001*

−0.56

0.66

—

Deep

<0.001*

−0.72

<0.001*

−0.42

FAZ area (mm2)

Superficial

<0.001*a

0.51

0.003*

0.34

Deep

0.001*b

0.39

0.45

—

Blood flow area rate of the choriocapillaris layer (%)

0.07

—

0.46

—

Parafoveal retinal thickness (μm)

Inner (ILM–IPL)

<0.001*

−0.54

0.21

—

Outer (IPL–RPE)

0.002*

−0.37

0.09

—

Inner segment ellipsoid band length (μm)

<0.001*

−0.58

0.15

—

  1. Analysable RP group: RP patients with analysable quality of the optical coherence tomography angiography images. FAZ = foveal avascular zone, ILM = internal limiting membrane, IPL = inner plexiform layer, RPE = retinal pigment epithelium. In a and b, data were missing for two eyes. *P < 0.05, univariate analysis: Spearman’s rank correlation coefficients; multivariate analysis: multiple stepwise regression analysis.
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