Table 1.

Frequency of co-occurring language and behavioural features in patients with FTLD pathology

	Early behavioural disinhibition (n = 59; 4 missing)	Early apathy or inertia (n = 53; 6 missing)	Early loss of sympathy or empathy (n = 39; 16 missing)	Early perseverative, stereotyped or compulsive/ritualistic behaviour (n = 55; 5 missing)	Hyperorality and dietary changes (n = 32; 28 missing)	Executive/generation deficits (n = 59; 13 missing)
AOS (n = 4; 2 missing)	1	1	1	1	1	3
Agrammatism (n = 8; 4 missing)	5	6	4	4	0	6
Impaired comprehension of complex syntax (n = 35; 22 missing)	24	25	20	23	10	32
Phonemic errors (n = 12; 4 missing)	9	7	4	6	4	7
Impaired sentence repetition (n = 22; 22 missing)	13	12	10	13	5	16
Impaired naming (n = 53; 2 missing)	41	30	26	39	22	36
Impaired word comprehension (n = 21; 3 missing)	19	10	11	18	11	13
Impaired object knowledge (n = 18; 6 missing)	15	8	10	16	11	10
Surface dyslexia (n = 14; 10 missing)	11	5	6	11	6	7
Semantic paraphasias (n = 17; 1 missing)	14	8	8	14	7	10
Stereotyped speech (n = 27; 5 missing)	21	15	17	27	15	21
Idiosyncratic speech (n = 13; 1 missing)	10	8	8	10	5	10
Economy of speech (n = 47; 0 missing)	35	35	25	36	21	36
Echolalia (n = 16; 0 missing)	14	11	13	14	10	13
Perseverative speech (n = 25; 3 missing)	21	19	16	21	10	16

n = Number of patients exhibiting each behavioural (column) and language (row) symptom; missing = number of patients with missing data for that particular feature.