Comparison 4. Intracranial haemorrhagic complications.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Intracranial hemorrhagic complications according to type of medication	5	839	Risk Ratio (M‐H, Fixed, 95% CI)	1.36 [0.59, 3.12]
1.1 Acetylsalicylic acid	2	211	Risk Ratio (M‐H, Fixed, 95% CI)	0.96 [0.19, 4.76]
1.2 Cataclot/OKY‐046	2	280	Risk Ratio (M‐H, Fixed, 95% CI)	1.55 [0.48, 5.02]
1.3 Dipyridamole	1	348	Risk Ratio (M‐H, Fixed, 95% CI)	1.52 [0.26, 8.97]
1.4 Ticlopidine	0	0	Risk Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
2 Intracranial haemorrhagic complications according to start of study medication	5	839	Risk Ratio (M‐H, Fixed, 95% CI)	1.36 [0.59, 3.12]
2.1 Start study medication before aneurysm treatment	1	348	Risk Ratio (M‐H, Fixed, 95% CI)	1.52 [0.26, 8.97]
2.2 Start study medication after aneurysm treatment	4	491	Risk Ratio (M‐H, Fixed, 95% CI)	1.31 [0.51, 3.37]