Table 1

Demographic features of the 55 subjects (25 male, 30 female): entire group of ataxic subjects

Mean (SD)Range
Age (years)30.5 (9.3)13 to 54
Age of onset of neurological disability (years)12.5 (5.4)3 to 26
Age at diagnosis (years)15.5 (6.0)6 to 30
Duration (years)18.3 (10.6)5 to 36
Age at which confined to wheelchair (years)18.8 (6.5)8 to 35