Furosemide (versus unexposed)

Study	Country Study period Study design	Data source	Exposure definition	Non-exposure definition	Exposition period	Sample size (exposed/unexposed) Or (case / control)	Remarks	Risk of bias

Study	Country Study period Study design	Data source	Case	Control	Exposition	Exposition period	Sample size (exposed/unexposed) Or (case / control)	Remarks	Risk of bias
Czeizel 1999	Hungary 1980 - 1996 case control	The Hungarian Case-Control Surveillance of Congenital Abnormalities (HCCSCA).	Newborn infants (including infant deaths and usual stillborn fetuses) with congenital abnormalities.	Newborn infants (including infant deaths and usual stillborn fetuses) without congenital abnormalities, matched according to gender, birth week and district of parents’ residence.	Exposure data collected from 3 sources: a post-paid structured questionnaire sent to the parents requesting drugs taken during pregnancy, according to gestational months; maternal prenatal care logbook (in which obstetricians must record all prescribed drugs); nurses visited non-responding families.	1st trimester, during pregnancy (anytime or not specified)	22865 / 38151
Czeizel 1999	Hungary 1980 - 1996 case control		The Hungarian Congenital Abnormality Registry (HCAR), in which notification by physicians of cases with Congenital anomalies is mandatory (including infant deaths and usual stillborn fetuses). Controls were selected from the National Birth Registry of the Central Statistical Office.			1st trimester, during pregnancy (anytime or not specified)	22865 / 38151

Risk of bias: : NA; : low; : moderate; : serious; : critical; : unclear;