Study | Country Study period |
Population source | Exposure definition | Non-exposure definition | Sample size | Rmk |
---|---|---|---|---|---|---|
Källén (control exposed to ergots), 2011 |
Sweden 1995 - 2008 |
All deliveries in Sweden (1 211 670 women) recorded in the Medical Birth Register with data from antenatal care. | Infants born to women who had used Rizatriptan during pregnancy. (This is a subgroup of exposure among the whole exposed group considered in the study). |
exposed to other treatment, sick
Infants born to women who had used Ergots drugs for migraine during pregnancy. (This is a subgroup of exposure among the whole exposed group considered in the study). |
157 / 527 | Exposed groups of the whole study: drugs for migraine (ergots or triptans). |
Källén (control unexposed, disease free), 2011 |
Sweden 1995 - 2008 |
All deliveries in Sweden (1 211 670 women) recorded in the Medical Birth Register with data from antenatal care. | Infants born to women who had used drugs for migraine (triptans or ergots) during pregnancy. Exposure to Rizatriptan provided and considered as a separate subgroup. |
unexposed, disease free
Infants born to women who did not use drugs for migraine. |
157 / 1229901 | Exposed groups of the whole study: drugs for migraine (ergots or triptans). 1229901= Total number of infants (n=1233228) - Number of infants whose mother used drugs for migraine in 1st trimester (n=3327) |
Nezvalová-Henriksen (Control unexposed, disease free), 2013 |
Norway 2004 - 2007 |
All singleton deliveries (after the 12th gestational week) without chromosomal abnormalities during the study period. | Rizatriptan prescription redemption during pregnancy ('anytime' or 'during the first trimester' or 'during the second trimester' or 'during the third trimester'). (This is a subgroup of exposure among the whole exposed group considered in the study). |
unexposed, disease free
Pregnant women did not redeem triptans during the study period (the population comparison group). |
334 / 178565 | Other triptans also studied. |
Nezvalová-Henriksen (Control unexposed, sick), 2013 |
Norway 2004 - 2007 |
All singleton deliveries (after the 12th gestational week) without chromosomal abnormalities during the study period. | Rizatriptan prescription redemption during pregnancy ('anytime' or 'during the first trimester' or 'during the second trimester' or 'during the third trimester'). (This is a subgroup of exposure among the whole exposed group considered in the study). |
unexposed, sick
Triptan prescription redemption between 7 and 1 month prior to pregnancy only. |
334 / 1095 | Other triptans also studied. |
Study | Country Study period |
Case | Control | Sample size | Rmk |
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1 study, not fulfilled eligibility criteria, were excluded. See excluded tab for the list of these studies and reason of exclusion.