Table 1.

Prevalence of poststroke dementia: results of the subgroup analysis (all timeframes)

Subgroup (studies, n)	All timeframes
	Prevalence, % (95% CI), n studies	Prevalence, % (95% CI), n studies
	Including prestroke dementia*	Excluding prestroke dementia
Study setting
Hospital-based	24.0 (20.6 to 27.8), n=15	18.2 (10.6 to 29.5), n=24
Population-based	11.1 (6.3 to 18.7), n=2	12.4 (4.9 to 28.2), n=9
	P=0.004	P=0.458
Stroke type
Recurrent stroke	41.7 (31.9 to 52.1), n=4	31.3 (13.9 to 56.4), n=8
First-ever stroke	18.1 (13.3 to 24.0), n=5	14.4 (8.3 to 24.0), n=19
Mixed population	23.8 (20.3 to 27.6), n=15	19.7 (10.6 to 33.6), n=14
	P=0.000	P=0.270
Year of publication
Historical	27.1 (23.7 to 30.7), n=11	19.1 (8.9 to 36.3), n=10
Contemporary	14.4 (11.3 to 18.3), n=6	15.1 (8.4 to 25.8), n=21
	P=0.002	P=0.620
Level of income
High	25.4 (21.2 to 30.0), n=11	12.8 (6.9 to 22.7), n=19
High-middle	23.5 (15.3 to 35.4), n=2	19.8 (7.3 to 43.7), n=7
Low-middle	14.9 (9.3 to 22.9), n=3	25.7 (9.9 to 52.1), n=7
Low	10.0 (4.6 to 20.5), n=1	No studies
	P=0.014	P=0.414

*The same study can appear in both inclusion and exclusion of prestroke dementia. Inclusion/exclusion prestroke dementia categories are not mutually exclusive.