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. 2021 Nov 10;7(46):eabi8178. doi: 10.1126/sciadv.abi8178

Table 1. Cohort demographics.

BLSA, Baltimore Longitudinal Study of Aging; YAPS, Young APOE Postmortem Study; ROS, Religious Orders Study; Disease duration, age death − age onset; MMSE, Mini Mental State Exam (last available before death); APOE ε4+, APOE e4 carrier; APOE ε4−, APOE e4 noncarrier. Note: The Wilcoxon rank sum (Mann-Whitney) test and χ2 test were used to test for differences in continuous and binary variables, respectively.

BLSA
Total sample AD CN
N = 52 N = 31 N = 21
Age at death, mean (SD) 86.26 (10.50)* 88.46 (8.30)* 83.02 (12.63)
Age of onset, mean (SD) 78.81 (9.92)*
Disease duration, mean (SD) 9.65 (4.47)*
Sex, n (% female) 22 (42.31)* 15 (48.39)* 7 (33.33)
Race, n (% white) 49 (94.23) 31 (100)† 18 (85.71)†
APOE e4 carrier, n (%) 14 (28.00) 9 (31.03) 5 (23.81)
MMSE, mean (SD) 24.66 (5.59) 21.60 (6.05)*† 28.06 (1.98)†
CERAD, mean (SD) 1.73 (1.34) 2.77 (0.43)† 0.19 (0.40)†
Braak, mean (SD) 4.10 (1.67) 5.13 (1.12)*† 2.57 (1.08)†
PMI (hours), mean (SD) 15.58 (10.01)* 16.25 (11.73)* 14.53 (6.63)*
ROS
Total sample AD CN
N = 53 N = 31 N = 22
Age at death, mean (SD) 90.58 (6.53)* 92.81 (5.45)*† 87.44 (6.75)†
Age of onset, mean (SD) 89.14 (5.71)*
Disease duration, mean (SD) 3.67 (2.94)*
Sex, n (% female) 40 (75.47)* 27 (87.10)*† 13 (59.09)†
Race, n (% white) 53 (100.00) 31 (100.00) 22 (100.00)
APOE e4 carrier, n (%) 13 (25.49) 9 (31.03) 4 (18.18)
MMSE, mean (SD) 19.95 (10.10) 12.77 (8.43)*† 28.50 (1.59)†
CERAD, mean (SD) 1.64 (1.26) 2.58 (0.50)† 0.32 (0.65)†
Braak, mean (SD) 3.89 (1.33) 4.65 (0.66)*† 2.82 (1.30)†
PMI (hours), mean (SD) 9.05 (5.32)* 8.67 (5.36)* 9.59 (5.35)*
YAPS
Total sample APOE ε4+ APOE ε4−
N = 35 N = 18 N = 17
Age at death, mean (SD) 38.97 (5.95) 39.06 (6.15) 38.88 (5.93)
Sex, n (% female) 13 (37.14) 6 (33.33) 7 (41.18)
Race, n (% white) 25 (71.43) 14 (77.78) 11 (64.71)
PMI (hours), mean (SD) 23.14 (11.42) 24.39 (12.46) 21.82 (10.42)

*P < 0.05 comparing BLSA to ROS (e.g., AD in BLSA compared to AD in ROS).

P < 0.05 comparing AD to CN.