Comparison 3. Secondary ischaemia.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 clinical signs of secondary ischaemia	2	114	Risk Ratio (M‐H, Fixed, 95% CI)	1.08 [0.54, 2.16]
1.1 treatment started before occlusion of the aneurysm	0	0	Risk Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
1.2 treatment started after occlusion of the aneurysm	2	114	Risk Ratio (M‐H, Fixed, 95% CI)	1.08 [0.54, 2.16]
2 infarct on CT/MR	1	82	Risk Ratio (M‐H, Fixed, 95% CI)	1.75 [0.55, 5.53]
2.1 treatment started before occlusion of the aneurysm	0	0	Risk Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
2.2 treatment started after occlusion of the aneurysm	1	82	Risk Ratio (M‐H, Fixed, 95% CI)	1.75 [0.55, 5.53]