Table 1 Study population description

Total number of individuals

44

Sex

  Male

28

63.6%

  Female

16

36.4%

Race

  White

31

70.5%

  African American

13

29.6%

Syrinx

  Yes

10

22.7%

  No

34

77.3%

Family history

  Yes

6

13.6%

  No

36

81.8%

  Unknown

2

4.6%

Datasets

  Blood gene expression

44

100.0%

  Dura gene expression

44

100.0%

  Cranial

40

90.9%

  Clinical questionnaire

36

81.8%

Age at surgery (years) ^a

8.89 ± 5.19