Table 1.

Demographics for all participants in all diagnostic groups

	Controls (156)	AD (17)	bvFTD (39)	nfvPPA (16)	svPPA (19)	rtFTD (14)
% female*	62.8	41.2	38.5	50.0	21.0	42.8
% R handed	NA	82.4	92.1	100.0	94.7	84.0
Age	60.4±10.5	61.2±7.8	61.4±8.5	67.6±10.5	63.7±7.1	65.5±5.7
Education	NA	16.1±3.1	16.0±3.2	17.9±3.0	17.4±2.5	16.6±3.3
MMSE	NA	21.0±5.2	24.6±4.9	24.8±8.5	23.9±3.9	25.7±3.8
% laughers	69.2	64.71	56.4	75.0	73.6	57.4
Syllable count *	849.3±352.8	539.9±223.3	417.1±285.9	445.3±285.2	873.0±574.3	574.7±337.6

AD, Alzheimer’s disease; bvFTD, behavioural variant frontotemporal dementia; MMSE, Mini-Mental State Exam; nfvPPA, non-fluent variant primary progressive aphasia; rtFTD, right temporal variant frontotemporal dementia; svPPA, semantic variant of primary progressive aphasia.

^*The asterisk signifies a between-group difference with p < 0.05.