All congenital malformations (majors, minors, majors and minors, or unspecified)

R analysis
id Study   Lib. in paper Exposition period    Study type  Control type 
Tags OR 95%CI x1/n1 x0/n0 no cases no exposed ROB Ref.
Gold, 2016 Major malformations 3 months or more before pregnancy or1st trimester excluded retrospective cohort unexposed, sick Adjustment: No 0.41 [0.01;12.93] C
excluded (exposition period)
1/20   0/3 1 20
Total 0 studies NaN [NaN;NaN] 0 0
x1: number of endpoints among exposed, n1: number of exposed; x0: number of endpoints among non exposed, n0: number of non exposed; C: calculated odds ratio from numbers of events and effectives

Forest plot

Sensitivity analysis