Peginterferon

Study	Country Study period	Population source	Exposure definition	Non-exposure definition	Sample size	Rmk
Beauverd, 2016	United Kingdom 2013 - 2015	Pregnant women with a diagnosis of essential thrombocythemia (ET) with pregnancy outcome available.	Pregnancies in essential thrombocythemia (ET) women treated with Pegylated interferon alpha-2a (PEG-IFN).	exposed to other treatment, sick Previous pregnancies in the same women without use of Pegylated interferon alpha-2a (PEG-IFN).	10 / 9	Other treatments in control group: low dose aspirin, ow molecular weight heparin (LMWH), IFN.

Study	Country Study period	Case	Control	Sample size	Rmk

4 studies, not fulfilled eligibility criteria, were excluded. See excluded tab for the list of these studies and reason of exclusion.