The main aims of this study are to gather information about how many children, teenagers and adults in Spain have been diagnosed with Dravet syndrome and Lennox-Gastaut syndrome as well as to learn about the number of new Dravet syndrome and Lennox-Gastaut syndrome cases in persons in Spain. Participants' data will be taken from their medical records (charts), which were already collected as a part of their routine care in public hospitals in Spain between 01 January 2021 and 31 December 2022.
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One-Year Period Prevalence of DS
Timeframe: Up to 12 months
Incidence of DS
Timeframe: At two different 12 month periods (in consecutive years at Months 12 and 24)
One-Year Period Prevalence of LGS Based on Stricter Diagnosis Criterion
Timeframe: Up to 12 months
Incidence of LGS Based on Stricter Diagnosis Criterion
Timeframe: At two different 12 month periods (in consecutive years at Months 12 and 24)