Comparison 11. Serious adverse events: immune thrombocytopenic purpura ‐ cohort studies.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Seasonal influenza vaccine ‐ HR (adjusted data)	1		Hazard Ratio (Random, 95% CI)	Subtotals only
1.1 General population	0		Hazard Ratio (Random, 95% CI)	0.0 [0.0, 0.0]
1.2 Pregnant women	1		Hazard Ratio (Random, 95% CI)	0.90 [0.68, 1.19]
2 Seasonal influenza vaccine (unadjusted data)	1		Odds Ratio (M‐H, Random, 95% CI)	Subtotals only
2.1 General population	0	0	Odds Ratio (M‐H, Random, 95% CI)	0.0 [0.0, 0.0]
2.2 Pregnant women	1	223898	Odds Ratio (M‐H, Random, 95% CI)	0.92 [0.70, 1.20]