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. Author manuscript; available in PMC: 2010 May 25.
Published in final edited form as: Arch Neurol. 2009 Jul;66(7):888–893. doi: 10.1001/archneurol.2009.92

Table 1.

Characterization of the study sample.

Dementia of
Alzheimer Type
n=457		 All
Frontotemporal
Dementias
n=92		 Behavioral
variant FTD
n=53		 Primary
Progressive
Aphasia
n=39
Gender (% men) 38.5% 38% 37.7% 38.5%
Mean age in years
at time of NPI
(range)		 67.5 (33-90) 60 (22-77) 62 (29-79) 65 (50-79)
Mean duration of
illness in years at
the time of the
NPI (range)		 4.0 (7-20)
n=326 		3.7 (1-12)
n=67 		3.6 (1-12)
n=39 		3.8 (1-10)
n=28
Mean years of
education (range)		 13 (0-28)
n=343 		14 (0-28)
n=68 		14.8 (5-23)
n=40 		13.2 (1-22)
n=28
Mean MMSE
score (range)		 20.4 (0-30)
n=409 		21.1 (0-30)
n=78 		22.6 (0-30)
n=43 		19.2 (0-30)
n=35
Mean Total NPI
score (range)		 13.7 (0-100) 23 (0-75) 30 (0-75) 13.6 (0-50)