Pregnancy registries: differences, similarities, and possible harmonization

Area of Science:

• Clinical Epidemiology
• Pharmacovigilance
• Reproductive Health

Background:

• Epilepsy and pregnancy registries have operated for over a decade, accumulating substantial data on antiepileptic drug (AED) use during pregnancy.
• Published findings from different registries highlight the need to assess the comparability of their observations, given methodological variations.

Purpose of the Study:

• To facilitate information exchange on methodologies among major epilepsy and pregnancy registries.
• To identify potential areas for harmonization in data collection and analysis across registries.
• To discuss the comparability of findings from the UK Epilepsy and Pregnancy Register, North American AED Pregnancy Registry (NAAPR), and EURAP.

Main Methods:

• A workshop was convened in September 2008 involving representatives from key international epilepsy and pregnancy registries.
• Discussions focused on comparing the methodologies employed by the UK Epilepsy and Pregnancy Register, NAAPR, and EURAP.
• The report summarizes the outcomes of these discussions regarding methodological differences and harmonization possibilities.

Main Results:

• The workshop facilitated a direct exchange of information regarding the operational methodologies of participating registries.
• Key differences and similarities in data collection and analytical approaches were identified.
• Areas where methodological harmonization could enhance data comparability were explored.

Conclusions:

• Comparative analysis of epilepsy and pregnancy registry data is crucial due to methodological variations.
• Harmonization efforts among registries like the UK Epilepsy and Pregnancy Register, NAAPR, and EURAP are essential for robust pharmacovigilance.
• Further collaboration is needed to standardize approaches for improved understanding of AED safety in pregnancy.