Table 1.

Studies evaluating the association between carotid plaque echolucency and risk of ipsilateral stroke

Study (year)	Number of patients	Mean follow-up (months)	Ipsilateral stroke RR (95% CI)
O’Holleran et al 19 (1987)	293	46	5.12 (2.01 to 13.04)
Polak et al 20 (1998)	4886	39.6	1.96 (1.25 to 2.90)
Mathiesen et al 21 (2001)	177	36	3.85 (0.46 to 32.28)
Grønholdt et al 22 (2001)	111	52.8	0.87 (0.34 to 2.23)
Nicolaides et al 23 (2005)	1092	37.1	2.23 (1.28 to 3.87)
Topakian et al 24 (2011)	435	21.8	6.61 (1.42 to 30.75)
Silvestrini et al 25 (2013)	621	27*	2.37 (1.14 to 4.92)
Huibers et al 26 (2016)	814	60	2.52 (1.20 to 5.25)

*Median follow-up.

RR, relative risk.