Figure 3.

Odds ratio and 95% confidence ratio for studies divided by the presence of n patients with only asymptomatic (A) or symptomatic (B) disease and whether the study outcome measure was only stroke (C) or stroke and TIA (D). The symbols and abbreviations are as in Figure 2.

A - Asymptomatic Patients

B - Symptomatic Patients

C - Stroke only as outcome measure

D - Stroke and TIA as outcome measure

A.

B.

C.

D.