Study | Country Study period |
Population source | Exposure definition | Non-exposure definition | Sample size | Rmk |
---|---|---|---|---|---|---|
Källén, 2013 |
Swedish 1996 - 2011 |
Nearly all births in Sweden during the study period (1,575,847) are registered in The Swedish Medical Birth Register. | Infants whose mothers used oxazepam in early pregnancy. (This is a subgroup of exposure among the whole exposed group considered in the study). |
unexposed (general population or NOS)
Infants in population whose mothers used at least one of a central nervous system active drugs (less than 3%) or weren't exposed in early pregnancy. |
843 / 1575847 | Follow-up period known thanks to author's email reply. |
Study | Country Study period |
Case | Control | Sample size | Rmk |
---|---|---|---|---|---|
Bonnot, 2001 |
France 1976 - 1998 |
Infants with the studied congenital malformation. | Infants with a malformations other than this one studied. | -9 / -9 | Data completed with Bonnot 2003. Total number of infants with a congenital malformation is 13703, but the number of cases changes according to the studied malformations. Raw data not sufficient to calculate OR (data for 'control' groups not available). |
Cornel - The NNL registry, 1996 |
The Netherlands 1981 - 1994 |
Infants with a cleft lip with or without cleft palate. | All infants notified with other anomalies. | 277 / 3737 | |
Sheehy, 2019 |
Canada 1998 - 2015 |
Pregnancies ending with spontaneous abortion (pregnancy loss between between the beginning of the sixth week of gestation and the 19th completed week of gestation, excluding planned or induced abortions). | Pregnancies ending with live births (5 for each case) randomly selected at the index date and matched with the case pregnancy by gestational age and calendar year. | 27149 / 134305 |