Table 3.

The effect of pallidal abnormal T2-signals on iron content in the globus pallidus and dentate nucleus in controls and premutation carriers.

Comparisons	β	SE	P	FDR
Globus pallidus QSM mean (ppm) (N = 70)
Pallidus	4.31	2.49	0.09	0.11
Age-by-pallidus	−0.97	0.37	0.011*	0.018
Globus pallidus QSM CV (N = 70)
Pallidus	0.031	0.040	0.45	0.45
Age-by-pallidus	0.024	0.006	<0.001*	0.001
Dentate nucleus QSM mean (ppm) (N = 67)
PM vs. NC	8.19	2.96	0.007*	0.018

^*Significant at FDR 0.05.

SE, standard error; FDR, false discovery rate; QSM, quantitative susceptibility mapping; ppm, parts per million; CV, coefficient of variation; PM, premutation carriers; NC, normal controls.