| Study | Type of data | Exposure measurement | Outcome assessment | Adjustment |
|---|---|---|---|---|
| Battino (Epilepsy), 2024 | prospective cohort | Reporting physicians collected information on drug therapy after each trimester. | Abnormalities in the offspring were recorded descriptively by reporting physicians. A committee blinded to type of exposure assessed and categorized these abnormalities. When necessary, the committee solicited additional information from the reporting physicians. | Exclusion of pregnancies exposed to known teratogenic drugs, and those with comorbidities associated with teratogenic risks. No adjustment for this group of comparison. |
| The NAAED (Indications NOS) (Controls exposed to LTG), 2024 | prospective cohort | Women are interviewed at enrollment, at 7 months’ gestation and at 8 –12 weeks after the expected date of delivery. The computer-assisted interviews include questions on start and stop dates of each antiepileptic drugs taken, dose, frequency and changes in medication. | Women were questioned with a computer-assisted telephone interview 3 times and medical records were obtained. The written descriptions in the pediatricians’ examinations were reviewed separately by the clinical teratologist. | No adjustment for this group of exposure and comparison. |
| The NAAED (Indications NOS) (Controls unexposed, disease free), 2024 | prospective cohort | Women are interviewed at enrollment, at 7 months’ gestation and at 8 –12 weeks after the expected date of delivery. The computer-assisted interviews include questions on start and stop dates of each antiepileptic drugs taken, dose, frequency and changes in medication. | Women were questioned with a computer-assisted telephone interview 3 times and medical records were obtained. The written descriptions in the pediatricians’ examinations were reviewed separately by the clinical teratologist. | No adjustment for this group of exposure and comparison. |
| The UKIEPR (Epilepsy) (Controls exposed to Lamotrigine), 2024 | prospective cohort | Information was collected at registration and changes of antiepileptic drugs during pregnancy were detected during the follow-up duration by sending a standardised questionnaire to the patient's general practitioner. Other health care practitioners were contacted if identified. | Outcome data were collected by sending the patient’s general practitioner a standardised questionnaire for completion during the follow-up duration. Other health care practitioners were contacted if identified. | None. |
| The UKIEPR (Epilepsy) (Controls unexposed, sick), 2024 | prospective cohort | Information was collected at registration and changes of antiepileptic drugs during pregnancy were detected during the follow-up duration by sending a standardised questionnaire to the patient's general practitioner. Other health care practitioners were contacted if identified. | Outcome data were collected by sending the patient’s general practitioner a standardised questionnaire for completion during the follow-up duration. Other health care practitioners were contacted if identified. | None. |