Table 3 Unary and multiple linear regression analysis of the relationship between predictive factors MHD, CTR, V_PTV, CLD, and lung dose volume

V_lung

R²

0.08

0.09

0.05

0.05

95%CI

 − 0.002–0.009

0–0.01

0.04–1.74

0.04–1.74

P

0.006

0.003

0.040

0.040

B

0.29

0.31

0.22

0.22

V_PTV

R²

0.05

0.05

95%CI

0–0.01

0–0.01

P

0.037

0.032

B

0.22

0.23

V_heart

R²

0.18

0.26

0.19

0.19

95%CI

 − 0.03–0.009

 − 0.03–0.01

 − 0.03–0.01

 − 0.03–0.01

P

0.001

0.001

0.001

0.001

B

 − 0.43

 − 0.41

 − 0.44

 − 0.44

CTR

R²

0.09

0.08

95%CI

 − 43.51–8.12

51.83—-9.56

P

0.005

0.005

B

 − 0.3

 − 0.29

CLD

R²

0.08

0.26

95%CI

0.67–4.26

0.5–5.1

P

0.008

0.018

B

0.28

0.28