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Table 2: Cerebrovascular lesions by group within the study sample
Age≤73 years Age > 73 years P^{^a}
CN (n = 13) MCI (n = 13) CN (n = 12) MCI (n = 12) 
WMH volume, (cm³)^{^a} 
    Median (IQR) 6 (4–8) 10 (6–25) 14 (8–18) 15 (12–25) .01 
    Range 1–14 4–45 6 to 25 4–65 
Subcortical infarctions, no. (%) 
    Present 1 (8) 1 (8) 2 (17) 2 (17) .74 
    Absent 12 (92) 12 (92) 10 (83) 10 (83) 
Cortical infarctions (<1-cm diameter) 
    Present 0 1 (8) 0 2 (17) 0.31 
    Absent 13 (100) 12 (92) 12 (100) 10 (83) 
a Differences across all 4 groups were tested with the Kruskal-Wallis test. Differences in rates of infarctions across all 4 groups were tested with the Fisher exact test.

	Age≤73 years		Age > 73 years		P^{^a}
	CN (n = 13)	MCI (n = 13)	CN (n = 12)	MCI (n = 12)	P^{^a}
WMH volume, (cm³)^{^a}
Median (IQR)	6 (4–8)	10 (6–25)	14 (8–18)	15 (12–25)	.01
Range	1–14	4–45	6 to 25	4–65
Subcortical infarctions, no. (%)
Present	1 (8)	1 (8)	2 (17)	2 (17)	.74
Absent	12 (92)	12 (92)	10 (83)	10 (83)
Cortical infarctions (<1-cm diameter)
Present	0	1 (8)	0	2 (17)	0.31
Absent	13 (100)	12 (92)	12 (100)	10 (83)