Table 1.

Subject demographics, including sample size n for seniors and subjects with each FTD phenotype, presented as mean ± standard deviation. The last column is the p-value from a one-way ANOVA with the null hypothesis that there is no difference in age, years of education or right-handedness between the four groups. For disease duration and the cognitive scores, the ANOVA is performed within the 3 FTD groups only. The p-value is greater than 0.05 for MMSE and category fluency, but not letter fluency. A post-hoc test (Tukey Honest Significant Difference) on letter fluency suggests a significant difference between bvFTD and naPPA (p < 0.02) but not between other FTD groups (p < 0.35).

	Seniors	bvFTD	naPPA	svPPA	Total	ANOVA (p)
n	15	33	9	12	69	NA
Sex (F, M)	9,6	12,21	3,6	8,4	32,37	0.17
Age(yr)	62 ± 6	62 ± 7	68 ± 11	63 ± 8	63 ± 8	0.16
Education (yr)	16 ± 3	16 ± 3	14 ± 3	16 ± 3	16 ± 3	0.50
Disease duration	NA	5 ± 3	3 ± 2	3 ± 2	4 ± 3	0.15
MMSE	29 ± 1	24 ± 6	20 ± 8	24 ± 5	25 ± 6	0.26
Category fluency	20 ± 6	11 ± 5	8 ± 5	8 ± 5	12 ± 7	0.07
Letter fluency	49 ± 11	26 ± 15	12 ± 9	20 ± 10	28 ± 17	0.01