Table 1 Univariate and multiple linear regression analysis of CI

Unary linear regression

CLD

0.044

 − 0.06–0

 − 0.21

0.047

CTR

0.045

0.007–0.607

0.21

0.045

V_PTV

0.39

0–0

0.63

0.000

MHD

0.047

0.001–0.051

0.22

0.041

V_lung

0.085

0–0

 − 0.29

0.005

Multiple linear regression

CLD

0.459

 − 0.046–0

 − 0.16

0.048

CTR

0.459

0.057–0.515

0.19

0.015

V_PTV

0.459

0–0

0

0.000