Table 2.

Baseline participant characteristics among included studies.

Study	Mean age, years	Hypertension (%)	Diabetes (%)	Smoking (%)	Previous stroke or TIA (%)	AF (%)	CHADS2 score (mean)	Follow-up, years
Benjamin et al. (17), USA	64.1	38.1	8	24.5	0	1.8	No report	8
Bouzas-Mosquera et al. (13), Spain	61.8	48.3	25.4	24	9.3	21.4	No report	5.5
Karas et al. (14), USA	59.1	No report	45.3	31.3	0	0	No report	12
Hamatani et al. (7), Japan	73.6	62.2	23.6	35	21	100	2.37	2.6
Haruki et al. (15), Japan	51	No report	No report	No report	No report	0	No report	10.7
Broughton et al. (16), USA	>65	No report	14.4	53.3	0	5	No report	13

TIA, transient ischemic attack; AF, atrial fibrillation.