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Table 1 Patients’ characteristics

From: Sacral insufficiency fractures after high-dose carbon-ion based radiotherapy of sacral chordomas

Characteristics

Value

Percent

Age (y)

 Median

61

 

 Range

34–84

 

Gender (n)

 Female

19

33.9

 Male

37

66.1

Most cranial level of the tumor (n)

 L4/5

7

12.5

 S1

9

16.1

 S2

18

32.1

 S3

12

21.4

 S4

4

7.1

 S5

4

7.1

 Os coccygeum

2

3.6

Sacral BMD in planning CT (HU)

 Median

- 18.5

 

 Range

- 89 – 151

 

SIFs (n)

29

51.8

Time to SIF (months)

 Median

11.5

 

 Range

0–62

 

Clinical relevance of SIFs (n)

 Pain

10

34.5

 Neurologic deficits

1

3.4

  1. Abbreviations: BMD Bone marrow density; SIFs Sacral insufficiency fractures; HU Hounsfield Units; CT Computed tomography; n Number; y Years