Cluster Group

Regression Coefficient (unstandardized)

Std. Error

Regression Coefficient (standardized)

P

95.0% Confidence Interval

FA

1

0.0003

0.0008

0.128

0.725

-0.0015 to 0.0021

2

0.0010

0.0008

0.389

0.266

-0.0009 to 0.0028

3

0.0001

0.0009

0.018

0.940

-0.0018 to 0.0019

4

0.0009

0.0004

0.485

0.019

0.0002 to 0.0017

MD

1

-0.0008

0.0009

-0.314

0.377

-0.0028 to 0.0012

2

-0.0006

0.0010

-0.208

0.564

-0.0030 to 0.0017

3

0.0000

0.0022

-0.003

0.991

-0.0047 to 0.0047

4

-0.0018

0.0007

-0.477

0.021

-0.0033 to -0.0003

AD

1

-0.0010

0.0015

-0.225

0.533

-0.0046 to 0.0026

2

0.0007

0.0017

0.139

0.703

-0.0032 to 0.0045

3

0.0004

0.0024

0.044

0.859

-0.0046 to 0.0055

4

-0.0014

0.0009

-0.298

0.167

-0.0033 to 0.0006

RD

1

-0.0007

0.0009

-0.277

0.438

-0.0027 to 0.0013

2

-0.0013

0.0011

-0.383

0.275

-0.0037 to 0.0012

3

-0.0002

0.0022

-0.027

0.912

-0.0049 to 0.0044

4

-0.0020

0.0007

-0.527

0.010

-0.0035 to -0.0005

FA, fractional anisotropy; MD, mean diffusivity; AD, axial diffusivity, RD, radial diffusivity; RNFL, retinal nerve fiber layer thickness.
Table 5: Effect of age-corrected RNFL thickness on age-corrected DTI Parameters by linear regression analysis.