Table 1. Demographic features of the subjects.

	No. of patients	CAG repeat length	Disease Duration # (years)	Age at study # (years)
SCA1	4	43.8±4.4	12.3±12.9	56.0±2.3
SCA2	16	42.9±6.2	6.5±4.0	44.9±16.9
SCA3	58	73.2±3.9	8.9±6.2	50.0±12.7
SCA6	10	23.6±1.1	8.3±7.7	56.7±11.3*
SCA17	6	44.5±2.2	3.0±3.2§	52.0±15.5
MSA-C	62	–	5.3±3. 6§§	62. 6±7.1**
Healthy controls	44	–	–	51.1±17.9

^#Kruskal-Wallis test, p<0.05.

^§Patients with SCA2 or SCA3 had a longer disease duration than those with SCA17, p<0.05.

^§§Patients with SCA3 had a longer disease duration than those with MSA-C.

^*Patients with SCA2 or SCA3 were younger than those with SCA6.

^**Patients with SCA were younger than those with MSA-C.