Table 2.

Mixed-effects model: Effects of group and duration since initial visit on MMSE scores

Predictors	F Value	DF [Num,Den]	Estimate
Intercept			0.325
Group	1.50	[3,231]
bvFTD			0.453
nfaPPA			-0.080
svPPA			-0.200
AD			0 [Reference]
Duration since initial visit	9.83	[1,181]	-0.224b
Duration × group	5.87a	[3,231]
Duration × bvFTD			0.158a
Duration × nfaPPA			0.234b
Duration × svPPA			-0.002
Duration × AD			0 [Reference]
Duration × duration	11.80	[1,231]	-0.005b
Baseline MMSE	3298.54	[1,231]	0.982b

Abbreviation: bvFTD = behavioral variant frontotemporal dementia; nfaPPA = nonfluent agrammatic variant of primary progressive aphasia; svPPA = semantic variant PPA; AD = Alzheimer's disease

^ap<.05

^bp<.01