Table 1.

Demographic and neuropsychological characteristics of study participants

	Whole group n=144 Mean (StD)	NC§ n=26 Mean (StD)	MCI n=12 Mean (StD)	AD n=26 Mean (StD)	FTD n=24 Mean (StD)	SD n=27 Mean (StD)	PNFA n=7 Mean (StD)	PSP/CBD/DLB n=22 Mean (StD)
Age	63.4 (10.2)	58.8 (12.8)*	75.4 (9.7)†	62.3 (8.6)	58.9 (6.1)*	63.5 (7.4)	60.7 (12.1)	69.3 (7.6)†
Education (yrs)	16.1 (2.7)	16.6 (2.3)	16.5 (2.6)	16.0 (2.6)	15.8 (2.2)	16.6 (3.1)	14.3 (2.4)	15.8 (2.7)
M/F	79/65	10/16	6/6	14/12	21/3	13/14	1/6	14/8
CDR (sum of boxes)	3.3 (2.9)	0.8 (1.8)	0.6 (0.6)*	3.8 (2.4)	5.8 (2.7)†	3.7 (2.6)	2.6 (2.4)	4.4 (2.5)
MMSE	24.9 (5.3)	29.4 (1.0)	29.3 (1.0)†	21.5 (5.5)*	25.8 (3.0)	23.3 (5.7)	24.4 (3.7)	22.4 (6.4)*
Rey figure copy	14.1 (3.6)	15.8 (1.4)	14.8 (1.4)	12.5 (5.5)	14.8 (2.1)	15.4 (1.5)	14.7 (1.6)	11.0 (4.5)*
Rey figure recall (30 min)	8.1 (4.9)	13.3 (1.5)	8.8 (4.4)	5.5 (5.1)*	7.4 (4.5)	7.2 (4.8)	7.3 (5.3)	7.1 (4.0)
Digits backwards	4.0 (1.4)	4.7 (0.9)	4.6 (0.8)	3.1 (1.1)*	4.5 (1.4)	4.7 (1.1)	3.1 (0.9)	2.8 (1.5)*
BNT	11.1 (4.5)	14.6 (0.8)	13.3 (2.5)	11.6 (3.3)	12.3 (3.2)	4.1 (3.7)*	10.7 (2.9)	12.8 (2.5)
PPTW	46.8 (6.7)	51.4 (1.0)	51.3 (0.8)*	48.2 (3.9)	47.3 (6.1)	37.8 (8.1)*	49.1 (2.5)	47.1 (4.1)
PPTP	45.9 (6.9)	50.6 (1.7)	50.8 (1.2)†	46.4 (6.7)	46.1 (6.8)	38.1 (7.4)*	47.3 (4.3)	45.7 (5.0)

^§significantly different on all neuropsychological measures from other diagnostic groups combined (p<0.05)

^*significantly lower than other diagnostic groups combined (p<0.05)

^†significantly higher than other diagnostic groups combined (p<0.05)

NC = normal control subjects; MCI = mild cognitive impairment; AD = Alzheimer’s Disease; FTD = fronto-temporal dementia; SD = semantic dementia; PNFA = progressive non-fluent aphasia; PSP = progressive supranuclear palsy; CBD = corticobasal degeneration; DLB = diffuse Lewy body dementia