Table 1.

Patient demographics. For age, years post onset, and severity, values shown are mean (standard deviation). P-values are from two-sample permutation tests for continuous outcomes and Fisher’s exact test for categorical outcomes. Language severity is based on the language subset from the FTD-CDR scale. Total severity refers to all language and behaviour assessments as per Knopman et al., (Knopman et al., 2008). The two groups (tDCS vs. sham) were matched in all measures.

	Combined (n = 22)	tDCS (n = 11)	Sham (n = 11)	P-value
Sex	11F, 11M	6F, 5M	5F, 6M	1.000
PPA variant	6L, 10N, 6S	4L, 4N, 3S	2L, 6N, 3S	0.857
Age	66.9 (7.5)	64.1 (8.4)	69.6 (5.7)	0.090
Years post onset	5.0 (3.0)	5.6 (3.4)	4.5 (2.5)	0.392
Language severity (FTD-CDR)	1.9 (0.8)	1.9 (0.8)	1.9 (0.8)	1.000
Total with language severity 0.5	2	1	1	-
Total with language severity 1	4	2	2	-
Total with language severity 2	12	6	6	-
Total with language severity 3	4	2	2	-
Total severity (FTD-CDR)	7.4 (4.8)	6.4 (3.6)	8.3 (5.7)	0.386
Marital status (number single)	4	3	1	0.587