Table 1. Influence of long CAG and age on cerebral gray matter.

Region	MNI coordinates (peak)	P values
		voxel level (corrected for ROI)	voxel level uncorrected
Primary endpoint: combined effect of long CAG and its interaction with age
(Contrast weights: long CAG×age, 1; age, 0; sex, 0)
Pallidum L	−17 −8 −3	0.007	8.4×10−6
Pallidum R	20 −12 2	0.11	0.0003
Secondary endpoint: main effect of long CAG
(Contrast weights: long CAG, 1; age, 0; sex, 0)
Pallidum L	−17 −8 −3	0.02	4.4×10−5
Pallidum R	18 −5 −2	0.8	0.037
Secondary endpoint: effect of interaction of long CAG and age
(Contrast weights: long CAG×age, 1; CAG, 0; age, 0; sex, 0)
Pallidum L	−20 0 −6	0.2*	0.0005
Pallidum R	21 −11 0	0.08*	0.0001

Note. L, left; R, right;

*corrected P value at the set level, 0.023.