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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