Study | Country Study period |
Population source | Exposure definition | Non-exposure definition | Sample size | Rmk |
---|---|---|---|---|---|---|
Dean (Ethosuximide), 2002 |
Scotland 1976 - 2000 |
Children of mothers taking antiepileptic drugs in pregnancy during the study period were ascertained from hospital obstetric records. | Children whose mothers took ethosuximide monotherapy in pregnancy and continued beyond the first trimester. (This is a subgroup of exposure among the whole exposed group considered in the study). |
unexposed, sick
Sibs of exposed cases not exposed to antiepileptic drugs in utero. Either the mothers had epilepsy or the child was born before epilepsy developed. |
4 / 38 | The data for major congenital malformations include all pregnancies surviving into the second trimester, whereas frequencies for other features were based on livebirths only. The vast majority of the mothers were treated for epilepsy. |
Kaaja (Ethosuximide), 2003 |
Finland 1980 - 1998 |
All women with epilepsy regardless of whether they used antiepileptic drugs during the index pregnancy. | Infants whose epileptic mothers took ethosuximide as monotherapy during the first trimester. (This is a subgroup of exposure among the whole exposed group considered in the study). |
unexposed, sick
Infants whose epileptic mothers didn't take any antiepileptic drugs during the first trimester. |
2 / 239 | |
Källén (Ethosuximide) (Controls exposed to Lamotrigine, sick) (Indications NOS), 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 ethosuximide in monotherapy in early pregnancy. (This is a subgroup of exposure among the whole exposed group considered in the study). |
exposed to other treatment, sick
Infants whose mothers used lamotrigine in monotherapy in early pregnancy. |
12 / 1084 | Indications for antiepileptic drugs are not specified. Wide 2004 outcomes' are already included in Källèn et al 2013 or are not compared to an adequate control group. Follow-up period known thanks to author's email reply. |
Källén (Ethsuximide) (Controls unexposed, NOS) (Indications NOS), 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 ethosuximide in monotherapy 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. |
12 / 1575847 | Indications for antiepileptic drugs are not specified. Follow-up period known thanks to author's email reply. |
Kilic (Ethosuximide) (Controls exposed to Lamotrigine, sick) (Mixed indications), 2014 |
Denmark 1997 - 2008 |
All singleton live-born children in Denmark during the study period. | Children whose mothers have been exposed to ethosuximide in monotherapy during the exposure window defined from 30 days before the estimated day of conception to the day prior to birth. (This is a subgroup of exposure among the whole exposed group considered in the study). |
exposed to other treatment, sick
Children whose mothers have been exposed to lamotrigine in monotherapy during the exposure window defined from 30 days before the estimated day of conception to the day prior to birth. |
1 / 880 | Less than 90% of women are epileptic. |
Kilic (Ethosuximide) (Controls unexposed NOS) (Mixed indications), 2014 |
Denmark 1997 - 2008 |
All singleton live-born children in Denmark during the study period. | Children whose mothers have been exposed to ethosuximide in monotherapy during the exposure window defined from 30 days before the estimated day of conception to the day prior to birth. (This is a subgroup of exposure among the whole exposed group considered in the study). |
unexposed (general population or NOS)
Children whose mothers haven't been exposed to antiepileptic drugs 30 days before the estimated day of conception to the day of birth. |
1 / 676834 | Less than 90% of women are epileptic. |
Kilic (Ethosuximide) (Controls unexposed, sick) (Mixed indications), 2014 |
Denmark 1997 - 2008 |
All singleton live-born children in Denmark during the study period. | Children whose mothers have been exposed to ethosuximide in monotherapy during the exposure window defined from 30 days before the estimated day of conception to the day prior to birth. (This is a subgroup of exposure among the whole exposed group considered in the study). |
unexposed, sick
Children whose mothers have an epilepsy diagnosis and haven't been exposed to antiepileptic drugs 30 days before the estimated day of conception to the day of birth. |
1 / 5296 | Less than 90% of women are epileptic. |
Kini (Ethosuximide) (Controls exposed to Lamotrigine, sick), 2006 |
UK 1989 - 1999 |
375 children aged between 6 months and 16 years from 219 mothers with epilepsy exposed and not exposed to antiepileptic drugs during pregnancy attending epilepsy clinics or antenatal care between the study period. | Children exposed to ethosuximide monotherapy during pregnancy and with epileptic mothers. (This is a subgroup of exposure among the whole exposed group considered in the study). |
exposed to other treatment, sick
Children exposed to lamotrigine monotherapy during pregnancy and with epileptic mothers. |
1 / 9 | Because we don't know the exact number of children exposed to lamotrigine and analyzed for malformations, this outcome cannot be reported here. |
Kini (Ethosuximide) (Controls unexposed, sick), 2006 |
UK 1989 - 1999 |
375 children aged between 6 months and 16 years from 219 mothers with epilepsy exposed and not exposed to antiepileptic drugs during pregnancy attending epilepsy clinics or antenatal care between the study period. | Children exposed to ethosuximide monotherapy during pregnancy and with epileptic mothers. (This is a subgroup of exposure among the whole exposed group considered in the study). |
unexposed, sick
Children not exposed to antiepileptic drugs during pregnancy and with epileptic mothers. |
1 / 101 | Because we don't know the exact number of children exposed to ethosuximide and analyzed for malformations, this outcome cannot be reported here. |
Morrow (Ethosuximide) (Controls exposed to Lamotrigine, sick), 2006 |
UK and Ireland 1996 - 2005 |
Pregnant women with epilepsy, whether or not they were taking an AED, either in monotherapy or polytherapy, and who were referred to the register before the outcome of the pregnancy was known. | Infants of women with epilepsy exposed to ethosuximide in monotherapy during the first trimester. (This is a subgroup of exposure among the whole exposed group considered in the study). |
exposed to other treatment, sick
Infants of women with epilepsy exposed to lamotrigine in monotherapy during the first trimester. |
12 / 647 | Exposure period is completed thanks to Campbell 2014 which is also a UKEPR based study. |
Morrow (Ethosuximide) (Controls unexposed, sick), 2006 |
UK and Ireland 1996 - 2005 |
Pregnant women with epilepsy, whether or not they were taking an antiepileptic drug, either in monotherapy or polytherapy, and who were referred to the register before the outcome of the pregnancy was known. | Infants of women with epilepsy exposed to ethosuximide in monotherapy during the first trimester. (This is a subgroup of exposure among the whole exposed group considered in the study). |
unexposed, sick
Infants of women with epilepsy and who didn't take any antiepileptic drugs during pregnancy. |
12 / 227 | Exposure period is completed thanks to Campbell 2014 which is also a UKEPR based study. |
Samrén (Ethosuximide), 1999 |
Netherlands 1972 - 1994 |
Offspring of women with epilepsy, with or without antiepileptic drug use during pregnancy, born during the study period. | Children born to mothers with epilepsy and using ethosuximide monotherapy at least during the first trimester of pregnancy |
unexposed, disease free
Children born to nonepileptic nonexposed women. |
9 / 2000 | |
Tomson (Ethosuximide), 2018 |
42 countries 1999 - 2016 |
Pregnancies registered in the database during the study period who had been exposed to antiepileptic drug monotherapy and had complete follow-up data up to 1 year. They were enrolled within gestation week 16 and before fetal outcome is known. | Offspring exposed in utero to ethosuximide monotherapy during the first trimester and born from epileptic mothers. (This is a subgroup of exposure among the whole exposed group considered in the study). |
exposed to other treatment, sick
Offspring exposed in utero to lamotrigine monotherapy during the first trimester and born from epileptic mothers. |
12 / 2514 | This study is an update of Tomson's 2011 publication. They excluded from the current analysis pregnancies occurring in women without epilepsy. EURAP registry: potential overlap. |
Vajda (Ethosuximide) (Controls exposed to Lamotrigine, sick), 2019 |
Australia 1999 - 2018 |
Pregnant women taking antiepileptic drugs for any indications or not treated with antiepileptic drugs in at least the first half of pregnancy. | Offsprings born from women nearly always with epilepsy exposed to ethosuximide in monotherapy in at least the first trimester of pregnancy. (This is a subgroup of exposure among the whole exposed group considered in the study). |
exposed to other treatment, sick
Offsprings born from women nearly always with epilepsy exposed to lamotrigine in monotherapy in at least the first trimester of pregnancy. |
5 / 406 | Women with epilepsy accounted for 98.3%. Completely overlap Vajda 2013 and 2014. Study design partly completed with Vajda 2013. |
Vajda (Ethosuximide) (Controls unexposed, sick), 2019 |
Australia 1999 - 2018 |
Pregnant women taking antiepileptic drugs for any indications or not treated with antiepileptic drugs in at least the first half of pregnancy. | Offsprings born from women nearly always with epilepsy exposed to ethosuximide in monotherapy in at least the first trimester of pregnancy. (This is a subgroup of exposure among the whole exposed group considered in the study). |
unexposed, sick
Offsprings born from women nearly always with epilepsy not treated with antiepileptic drugs in at least the first half of pregnancy. |
5 / 176 | Women with epilepsy accounted for 98.3%. Completely overlap Vajda 2013 and 2014. Study design partly completed with Vajda 2013. |
Study | Country Study period |
Case | Control | Sample size | Rmk |
---|---|---|---|---|---|
Bànhidy (Ethosuximide), 2011 |
Hungary 1980 - 1996 |
Children affected with congenital abnormalities and who had mothers with medically recorded epilepsy. | Newborn infants without congenital abnormality and who had mothers with medically recorded epilepsy. | 95 / 90 | Malformations caused by major mutant genes or chromosomal aberrations with preconceptional origin were excluded. Exposure period completed with Czeizel 1992. |