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Table 1 Characteristics of Patients and Treatments

From: Treatment outcomes of proton or carbon ion therapy for skull base chordoma: a retrospective study

Characteristics

 

n

%

Total

 

24

 

Age,

Median year (range)

55.5 (24–79)

 

ECOG PS

0/1

21/3

88/12

Gender

Male/female

10/14

42/58

Tumour status

Primary/ postsurgical recurrence

17/7

71/29

Surgical intervention before PT or CIT

No/yes

10/14

42/58

Ion type

PT/CIT

11/13

46/54

GTV volume

Median ml (range)

17.0 (0.4–113.1)

 

Total dose/ fractionation

57.6 Gy (RBE) / 16fr

1

4

60.8 Gy (RBE) / 16fr

2

8

65.0 Gy (RBE) / 26fr

13

54

70.2 Gy (RBE) / 26fr

3

13

70.4 Gy (RBE) / 32fr

3

13

74.0 Gy (RBE) / 37fr

2

8

GTV Dmina

Median Gy (RBE) (range)

55.0 (7.1–86.1)

 
  1. PT proton therapy, CIT carbon ion therapy, GTV gross target volume, Dmin minimum dose
  2. aMinimum dose of GTV was standardised as equivalent dose in 2Gy with α/β = 2 using LQ model