Table 2 Comparisons of perfusion parameter A between control and CKD groups over 44 weeks by GEE multiple linear regression.

Parameter A

Intercept

12.017

0.4699

11.096

12.938

< 0.001

CKD versus Control

− 0.083

0.5912

− 1.242

1.075

0.888

Compare the changes at each time point to week 0 in control group

[Week = 44] versus [Week = 0]

− 2.203

0.4733

− 3.131

− 1.276

< 0.001

[Week = 30] versus [Week = 0]

− 1.882

0.3321

− 2.533

− 1.231

< 0.001

[Week = 16] versus [Week = 0]

− 1.198

0.3637

− 1.911

− 0.485

0.001

[Week = 8] versus [Week = 0]

− 0.547

0.2088

− 0.956

− 0.137

0.009

Compare the changes between CKD and control groups at each time point

[Week = 44]

− 3.615

0.8864

− 5.352

− 1.878

< 0.001

[Week = 30]

− 3.637

0.7939

− 5.193

− 2.081

< 0.001

[Week = 16]

− 1.630

0.5196

− 2.648

− 0.612

0.002

[Week = 8]

0.463

0.5022

− 0.521

1.448

0.356