Table 3:

Mean lesion susceptibility relative to normal-appearing parenchyma^{^a}

	WM Lesions	Cortical Lesions	Mixed Lesions
	WM Lesions	Cortical Lesions	WM Portion	Cortical Portion
Relative susceptibility (ppm) (per lesion type)	0.014 ± 0.014	−0.018 ± 0.013	0.014 ± 0.018	−0.009 ± 0.012
t test	P < 10⁻²²	P < 10⁻⁷	P < .043	P < .054
Relative susceptibility (ppm) (per lesion type per subject)	0.014 ± 0.010	−0.015 ± 0.009	–	–
t test	P < .0004	P < .004	–	–

↵a The null hypothesis of the t test is that the mean of relative susceptibility = 0. The significance level is .0083 after correcting multiple comparisons of 6 using the Bonferroni method.