Table 3.

Overview of the design of speech and language therapy intervention studies in primary progressive aphasia

	Case study	Case series	Non-randomised, noncontrolled trial	Non-randomised controlled trial	Systematic review
Impairment based approaches - word retrieval therapies
9					✔
10		✔
11				✔
12					✔
13	✔
Impairment based approaches - script training and other approaches to improving fluency
14	✔
15		✔
16		✔
17	✔
18	✔
19				✔
Compensatory-based approaches
20	✔
21	✔
22	✔
23	✔
24	✔
25	✔
26	✔
27		✔
28	✔
29	✔
32	✔
35		✔
7			✔
36				✔
Group education and support
37				✔
38			✔
39			✔