Incidence and Prevalence
Approximately 5% of children with epilepsy have LGS, and it is more common in males than females. Whereas some children seem perfectly normal prior to the development of seizures, others already had some form of epilepsy, such as West syndrome, which is seen in 20% of patients before (symptomatic) LGS. West syndrome is characterized by Blitz Nick Salaam seizures, and typically evolves into LGS in the second year of life.
Read more about this topic: Lennox–Gastaut Syndrome
Other articles related to "incidence and prevalence, incidence, prevalence":
... the frequency of occurrence of a disease or condition The incidence rate of a condition is the rate at which new cases occurred per person-year, for example, "2 new cases per 1,000 person-years" ... The cumulative incidence is the proportion of a population that became new cases within a specified time period, for example, "1.5 per 1,000 people became new cases during 2006" ... The point prevalence of a condition is the proportion of a population that had the condition at a single point in time, for example, "10 cases per 1,000 people at the start of 2006" ...
... Sebaceous nevi occur in 1 to 3 of 1000 births, with equal incidence by sex ... Prevalence is unknown, but Epidermal nevus syndrome is listed with the National Organization for Rare Disorders, which defines rare as affecting "fewer than 200,000 ...
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