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Table 1 Sample Characteristics

From: A longitudinal investigation into cognition and disease progression in spinocerebellar ataxia types 1, 2, 3, 6, and 7

     

CAG repeat length (range)

Group

n

Age at onset (range)

Age at baseline (range)

Follow-up period

Normal allele

Expanded allele

SCA1

2

30.5y (30–31)

36y (36)

6.5y

30.5 (29–32)

50.5 (50–51)

SCA2

2

40.5y (37–44)

52.5y (50–55)

7y

21.5 (21–22)

41 (41)

SCA3

2

32.5y (25–40)

45y (37–50)

8y

16 (14–20)

72.3 (70–74)

SCA6

4

47.5y (28–59)

42.5y (41–65)

7y

12.3 (11–13)

22.5 (22–23)

SCA7

3

33.7y (29–38)

42.3y (38–50)

7y

13.7 (12–15)

56.3 (46–65)

  1. All values represent the group average (mean). Range values are given in brackets
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Orphanet Journal of Rare Diseases

ISSN: 1750-1172