ATXN3 and Parkinson disease: In the subgroup analysis based on individual type of SCA, patients with parkinsonism were associated with a fewer number of CAG repeats in SCA2 (31.0 ± 4.5 vs. 36.9 ± 6.0, p = .03) and SCA3 (65.6 ± 7.9 vs. 70.0 ± 4.2, p = .02).