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Table 2 Demographic characteristics of the study cohort

From: The use of synaptic biomarkers in cerebrospinal fluid to differentiate behavioral variant of frontotemporal dementia from primary psychiatric disorders and Alzheimer’s disease

Diagnostic groups

bvFTD (n = 57)

PPD (n = 71)

AD (n = 60)

Controls (n = 39)

p-value

Age

64 (8)b,d

56 (9)a,c

66 (7) b,d

57 (8) a,c

< 0.001

Female sex (%)

21 (37%)

27 (38%)

27 (45%)

13 (33%)

0.737

Psychotropic medication use (% Yes)

16 (30%)

36 (51%)d

21 (35%)

5 (15%)b

0.014

CSF biomarkers (pg/mL)

 NfL

1630 (1052)b,c,d

369 (178)a,c

848 (332)a,b,d

337 (187)a,c

< 0.001

 SNAP25

37 (32)c

33 (22)c

51 (19)a,b,d

28 (7)c

< 0.001

 Ng

389 (312)c

351 (230)c

723 (1069)a,b,d

283 (107)c

< 0.001

 NPTX2

401 (270)b,d

583 (300)a

477 (227)b

542 (240)a

< 0.001

 GluR4

1100 (995)

1223 (1070)

1112 (510)

1070 (386)

0.456

Cognitive domains

 Memory

− 0.13 (0.6)b,c,d

0.41 (0.6)a,c

− 0.95 (0.7)a,b,d

0.73 (0.6)a,c

< 0.001

 Attention

− 0.35 (1.0)b,d

0.14 (0.8)a,c,d

− 0.27 (0.8)b,d

0.53 (0.3)a,b,c

< 0.001

 Executive functioning

− 0.44 (0.9)b,d

0.16 (0.6)a,c,d

− 0.43 (0.8)b,d

0.64 (0.4)a,b,c

< 0.001

 Language

− 0.29 (0.7)b,d

0.32 (0.5)a,c

− 0.44 (0.9)b,d

0.60 (0.5)a,c

< 0.001

 Visuospatial functioning

0.11 (0.5)c

0.19 (0.5)c

− 0.64 (1.1)a,b,d

0.34 (0.3)c

< 0.001

 Total cognitive score

− 0.43 (0.8)b,d

0.2 (0.7)a,c,d

− 0.60 (0.7)b,d

0.60 (0.3)a,b,c

< 0.001

Other tests

 MMSE

24.3 (5)b,d

26.9 (2)a,c

20.7 (5)b,d

28.3 (1)a,c

< 0.001

 Geriatric depression scale

3.2 (3)b

6.3 (4)a,c,d

2.9 (3)b

3.4 (3)b

< 0.001

 Ekman 60 faces test

33.7 (7)b

42.7 (7)a

-

-

0.023

 FTLD- CDR

7 (4)

-

-

-

-

  1.  Cognitive domain data are represented by z-scores. Other tests are represented as absolute scores. Missing data: GluR4: 3 bvFTD, 3 AD, 1 control; memory: 2 AD, 9 bvFTD, 3 PPD; attention: 2 bvFTD; executive functioning: 2 AD, 4 bvFTD, 2 PPD; visuospatial functioning: 22 AD, 25 bvFTD, 11 PPD, 4 controls; total cognitive score: 2 bvFTD; MMSE: 3 AD, 1 bvFTD, 1 PPD; geriatric depression scale: 7 AD, 11 bvFTD, 6 PPD, 2 controls; Ekman 60 faces test: 44 bvFTD, 62 PPD (not available for AD and controls); FTLD-CDR (available for bvFTD only): 2 bvFTD
  2. bvFTD, behavioral frontotemporal dementia; PPD, primary psychiatric disorders; AD, Alzheimer’s disease; NfL, neurofilament light; SNAP25, synaptosomal-associated protein 25; Ng, neurogranin; NPTX2, neuronal pentraxin 2; MMSE, mini-mental state examination; FTLD-CDR, frontotemporal lobar degeneration-modified clinical dementia rating scale
  3. Data represents the mean (SD) or n (%); ap < 0.05 vs bvFTD, bp < 0.05 vs PPD, cp < 0.05 vs AD, dp < 0.05 vs controls