Table 2:

Correlation of disease severity and CNS volumes with disease duration and CAG repeat length

	Disease Duration		CAG Repeat Length
	SCA3	SCA6	SCA3	SCA6
ICARS score	ρ = 0.598	ρ = 0.632	N.S.	N.S.
	P = .011^a	P = .006^b
Cerebellar volume	ρ = −0.506	ρ = −0.623	N.S.	N.S.
	P = .038^a	P = .017^a
Brain stem	ρ = −0.51	N.S.	N.S.	N.S.
volume	P = .036^a

a Significant with P < .05.
b Highly significant with P < .01.