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Table 2 NACC cerebrovascular outcomes by cohort showing the frequency and percentages for each level of severity

From: Cerebrovascular pathology in Down syndrome and Alzheimer disease

  Cohort
Characteristic AD (n = 80) DS (n = 32) Ctrl (n = 37)
Atherosclerosis
 Not assessed 2 (2.5%) 0 (0%) 0 (0%)
 None 34 (42%) 24 (75%) 9 (24%)
 Mild 28 (35%) 5 (16%) 16 (43%)
 Moderate 11 (14%) 2 (6.2%) 9 (24%)
 Severe 4 (5%) 0 (0%) 3 (8.1%)
 Missing 1 (1.2%) 1 (3.1%) 0 (0%)
Arteriolosclerosis
 Not assessed 0 (0%) 0 (0%) 0 (0%)
 None 43 (54%) 31 (97%) 21 (57%)
 Mild 21 (26%) 0 (0%) 9 (24%)
 Moderate 12 (15%) 0 (0%) 6 (6%)
 Severe 3 (3.8%) 0 (0%) 1 (2.7%)
 Missing 1 (1.2%) 1 (3.1%) 0 (0%)
CAA
 Not assessed 0 (0%) 0 (0%) 0 (0%)
 None 22 (28%) 4 (12%) 30 (81%)
 Mild 32 (40%) 8 (25%) 4 (11%)
 Moderate 11 (14%) 7 (22%) 3 (8.1%)
 Severe 14 (18%) 12 (38%) 0 (0%)
 Missing 1 (1.2%) 1 (3.1%) 0 (0%)