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Table 1 Demographics, clinical information, and biomarkers across diagnostic categories

From: The Aβ1–42/Aβ1–40 ratio in CSF is more strongly associated to tau markers and clinical progression than Aβ1–42 alone

  

CN

AD

DLB

FTLD

Down

Others

N

 

197

518

128

186

225

536

AGE, years

Mean (SD)

53.5 (12.5)

73.1 (6.88)

75.7 (5.49)

70.8 (8.58)

45.1 (10)

70 (9.18)

Median [IQR]

55 [46–62]

74 [69–78]

76 [71–80]

72 [66–77]

48 [40–52]

71 [65–77]

SEX, females/males (% females)

132/65 (67%)

311/207 (60%)

64/64 (50%)

77/109 (41.4%)

103/122 (45.8%)

310/226 (57.8%)

MMSE score

Mean (SD)

29.2 (0.889)

23.6 (4.52)

24 (4.09)

24 (5.08)

NAa

25.4 (4.12)

Median [IQR]

29 [29–30]

25 [22–27]

24.5 [22–27]

25 [21–28]

NAa

27 [24–28]

Education, years

Mean (SD)

15.6 (3.99)

10.7 (4.72)

9.18 (5.05)

12 (5.13)

15.3 (3.07)

10.7 (4.93)

Median [IQR]

16 [12–20]

10 [8–13]

8 [7–12]

12 [8–16]

NAa

9 [8–13]

APOEε4, APOEε4−/APOEε4+ (%APOEε4+)

46/151 (23.4%)

254/251 (50.3%)

33/93 (26.2%)

37/139 (21%)

44/177 (19.9%)

115/413 (21.8%)

Follow-up, years

Mean (SD)

2.02 (1.99)

1.09 (1.49)

3.33 (1.93)

1.71 (1.47)

1.76 (2.09)

0.59 (1.23)

Median [IQR]

1.71 [0–2.82]

0 [0–2.06]

3.46 [2.07–4.52]

1.52 [0.242–2.66]

NAa

0 [0–0.383]

Aβ1–42, pg/ml

Mean (SD)

1148 (397)

562 (165)

817 (399)

938 (446)

715 (417)

1000 (500)

Median [IQR]

1118 [849–1371]

556 [432–673]

703 [542–1009]

850 [569–1229]

583 [430–892]

896 [609–1323]

Aβ1–40, pg/ml

Mean (SD)

11,694 (3595)

12,790 (3781)

11,506 (4189)

10,806 (4357)

11,673 (4678)

11,399 (4390)

Median [IQR]

11,329 [9238–13,777]

12,541 [10,125–15,122]

10,885 [8882–14,234]

10,140 [7710–13,334]

11,035 [8346–14,594]

10,638 [8112–13,986]

Aβ1–42/Aβ1–40

Mean (SD)

0.0991 (0.0181)

0.0453 (0.0108)

0.0727 (0.0263)

0.0877 (0.0221)

0.0615 (0.0226)

0.0862 (0.0225)

Median [IQR]

0.104 [0.0986–0.109]

0.0445 [0.0376–0.0514]

0.0662 [0.0503–0.0996]

0.0964 [0.0731–0.103]

0.0562 [0.0422–0.078]

0.0943 [0.0665–0.103]

tTau, pg/ml

Mean (SD)

255 (152)

748 (358)

456 (334)

387 (260)

644 (520)

334 (231)

Median [IQR]

230 [174–291]

656 [488–915]

361 [253–525]

322 [222–456]

489 [262–870]

292 [213–378]

pTau181, pg/ml

Mean (SD)

37.3 (27.3)

122 (60.3)

70.5 (55.5)

49.9 (39.2)

100 (96.8)

45 (27.4)

Median [IQR]

31.6 [24.9–42]

105 [78.7–145]

51 [35.7–83]

39.7 [29.2–54.1]

63.6 [29.8–151]

41 [29.3–52.7]

NfL, pg/ml

Mean (SD)

475 (256)

1330 (1824)

1108 (570)

2079 (1836)

815 (773)

1488 (1340)

Median [IQR]

458 [320–533]

981 [791–1254]

918 [719–1297]

1412 [884–2767]

614 [357–1014]

1089 [595–1878]

Clinical stage, CN/MCI/dementia (% MCI)

177/0/0

0/296/208

2/60/64

5/90/80

NAa

27/348/125

Amyloid profile (Aβ1–42[−]Ratio[−]/Aβ1–42[−]Ratio[+]/Aβ1–42[+]Ratio[−]/Aβ1–42[+]Ratio[+])

165/13/11/8

4/154/2/358

50/29/7/42

120/8/23/35

61/37/13/114

345/45/47/100

  1. MMSE Mini-Mental State Examination, CSF cerebrospinal fluid, CN cognitively normal, AD Alzheimer’s disease, DLB dementia with Lewy bodies; FTLD frontotemporal lobar degeneration-related syndrome, MCI mild cognitive impairment
  2. aDue to specific particularities of the clinical and cognitive assessment in the context of intellectual disability, participants with Down syndrome were excluded from the prognostic analysis