Comparison 2. Case fatality.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Case fatality, according to type of medication	7	1354	Risk Ratio (M‐H, Fixed, 95% CI)	1.01 [0.74, 1.37]
1.1 Acetylsalicylic acid	3	264	Risk Ratio (M‐H, Fixed, 95% CI)	0.98 [0.49, 1.93]
1.2 Cataclot/OKY‐046	2	280	Risk Ratio (M‐H, Fixed, 95% CI)	1.17 [0.57, 2.41]
1.3 Dipyridamole	1	677	Risk Ratio (M‐H, Fixed, 95% CI)	1.12 [0.74, 1.71]
1.4 Ticlopidine	1	133	Risk Ratio (M‐H, Fixed, 95% CI)	0.35 [0.10, 1.23]
2 Case fatality, according to start of study medication	7	1354	Risk Ratio (M‐H, Fixed, 95% CI)	1.01 [0.74, 1.37]
2.1 Start study medication before aneurysm treatment	2	730	Risk Ratio (M‐H, Fixed, 95% CI)	1.10 [0.74, 1.64]
2.2 Start study medication after aneurysm treatment	5	624	Risk Ratio (M‐H, Fixed, 95% CI)	0.88 [0.54, 1.45]