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Table 3 Assessment of prognostic factors affecting local control rates using univariate and multivariate analysis

From: Particle beam radiation therapy using carbon ions and protons for oligometastatic lung tumors

Variable

No. of patients

P value

Adjusted HR (95% CI)

Univariate analysis

   

Age

   

  <60 years

17

0.956

 

  ≥60 years

30

  

Gender

   

  Male

29

0.396

 

  Female

18

  

Performance status

   

  0

30

0.447

 

  ≥1

17

  

Primary tumor site

   

  Colorectum

11

0.080

 

  Others

36

  

Tumor diameter

   

  <20 mm

21

0.237

 

  ≥20 mm

26

  

BED10

   

  <110 GyE

25

0.048

 

  ≥110 GyE

22

  

Beam type

   

  Proton

18

  

  Carbon ion

23

0.800

 

  Proton and carbon ion

6

  

Multivariate analysis

   

  Primary tumor site

 

0.287

2.666 (0.439-16.195)

  BED10

 

0.392

2.558 (0.298-21.996)