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Table 1 Characterization of cohorts (amyloid status as defined by Aβ42/Aβ40 ratio)

From: Identifying clinically useful biomarkers in neurodegenerative disease through a collaborative approach: the NeuroToolKit

 

CU (A−)

CU (A+)

CU (missing)a

MCI (A−)

MCI (A+)

AD-dementia (all)

Characteristics

ALFA+

Wisconsin

ALFA+

Wisconsin

Wisconsin

Wisconsin

Wisconsin

Wisconsin

Abby/Blaze

N

263

376

135

160

10

23

33

49

164

Age, mean (SD)

60.5 (4.5)

60.3 (7.5)

62.2 (5.0)

64.0 (7.2)

60.7 (7.6)

69.2 (8.5)

73.7 (7.9)

72.3 (8.5)

69.6 (7.8)

Female, n (%)

163 (41)

250 (38)

81 (20)

107 (16)

8 (1)

12 (2)

12 (2)

17 (3)

85 (52)

Education, mean (SD)

13.6 (3.5)

16.2 (2.5)

13.3 (3.6)

16.3 (2.4)

17.1 (3.1)

15.7 (2.7)

16.2 (2.6)

14.5 (2.7)

NA

MMSE, mean (SD)

29.2 (0.9)

29.4 (0.9)

29.1 (1.0)

29.2 (1.0)

29.3 (1.0)

28.2 (1.7)

27.0 (2.2)

21.7 (3.8)

21.7 (3.2)

CDR-SB, mean (SD)

0

0.04 (0.20)

0

0.13 (0.31)

0

1.38 (1.44)

1.81 (1.18)

4.44 (1.61)

4.56 (1.94)

PACC, mean (SD)

−0.16 (0.93)

−0.13 (1.13)

−0.11 (1.03)

−0.35 (1.29)

−0.02 (0.98)

−2.26 (1.04)

−2.93 (0.97)

−4.60 (1.42)

NA

APOE-ε4 carriers, n (%)

111 (28)

105 (16)

103 (26)

86 (13)

4 (1)

6 (1)

20 (3)

32 (5)

118 (72)

APOE-ε4 non-carriers, n (%)

152 (38)

251 (39)

32 (8)

67 (10)

6 (1)

13 (2)

12 (2)

16 (3)

46 (28)

  1. aAmyloid-β status is unknown due to missing Aβ40 analysis
  2. Abbreviations: Aβ42, amyloid-β1–42; Aβ40, amyloid-β1–40; AD, Alzheimer’s disease; CDR-SB, Clinical Dementia Rating Scale – Sum of Boxes; CU, cognitively unimpaired; MCI, mild cognitive impairment; MMSE, Mini-Mental State Examination; NA, not applicable; PACC, Preclinical Alzheimer’s Cognitive Composite; SD, standard deviation