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In 2007 a case control study was completed within the EUROCAT European network of congenital anomaly registers to test the hypothesis that first trimester lamotrigine monotherapy exposure is associated with an increased risk of isolated oral clefts. This study found no statistically significant increased risk of oral clefts compared with other defects following in utero lamotrigine exposure. The EUROCAT Antiepileptic Drug (AED) Database, established for the original case control study in 2007, will now be expanded to include an additional five to six years worth of data. These data will provide greater power to investigate the risk of isolated oral clefts, specific cleft types and potential associations with additional specific malformation types (e.g. neural tube defects). Data on cases of isolated oral clefts registered between 1993 and 2012 will be extracted from EUROCAT member registers meeting set inclusion criteria (ensuring completeness of outcome and exposure data). The primary comparison group will include all non oral cleft, non chromosomal malformations as the registers do not collect data on non malformed infants. This study will also be powered to include a second control group of chromosomal malformations, very unlikely to be associated with medication exposure. Data on exposure to anti-epileptic drugs (AEDs) during the first trimester of pregnancy will be extracted along with other key covariates including age of mother, history of epilepsy and gestational age of the infant. Primary analyses, using logistic regression, will compare the lamotrigine monotherapy versus no AED use across case and control groups and a secondary analysis will compare lamotrigine monotherapy versus other AED monotherapy (with and without valproate). Data will also be monitored for patterns of lamotrigine exposure across additional specific malformation groups of interest.
Observational Model: Case Control, Time Perspective: Retrospective
Outcomes of Pregnancy With Chromosomal Malformations
Lamotrigine monotherapy, Non lamotrigine anti-epileptic drug monotherapy, No anti-epileptic drug exposure
Active, not recruiting
Published on BioPortfolio: 2014-08-27T03:16:26-0400
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