Síndrome de espasmos infantis

A incidência varia de 0.25 a 0.60 a cada 1000 bebês nascidos vivos em todo o mundo.[6]Cowan LD, Hudson LS. The epidemiology and natural history of infantile spasms. J Child Neurol. 1991 Oct;6(4):355-64. http://www.ncbi.nlm.nih.gov/pubmed/1940138?tool=bestpractice.com [7]Sidenvall R, Eeg-Olofsson O. Epidemiology of infantile spasms in Sweden. Epilepsia. 1995 Jun;36(6):572-4. http://www.ncbi.nlm.nih.gov/pubmed/7555969?tool=bestpractice.com [8]Riikonen R, Donner M. Incidence and aetiology of infantile spasms from 1960 to 1976: a population study in Finland. Dev Med Child Neurol. 1979 Jun;21(3):333-43. http://www.ncbi.nlm.nih.gov/pubmed/467816?tool=bestpractice.com [9]Kalra V, Gulati S, Pandey RM, et al. West syndrome and other infantile epileptic encephalopathies: Indian hospital experience. Brain Dev. 2002 Mar;24(2):130-9. http://www.ncbi.nlm.nih.gov/pubmed/11891107?tool=bestpractice.com A prevalência varia de 0.15 a 0.2 por 1000 crianças menores de 10 anos.[10]Matsuo A, Matsuzaka T, Tsuru A, et al. Epidemiological and clinical studies of West syndrome in Nagasaki Prefecture, Japan. Brain Dev. 2001 Nov;23(7):575-9. http://www.ncbi.nlm.nih.gov/pubmed/11701258?tool=bestpractice.com [11]Cowan LD, Bodensteiner JB, Leviton A, et al. Prevalence of the epilepsies in children and adolescents. Epilepsia. 1989 Jan-Feb;30(1):94-106. http://www.ncbi.nlm.nih.gov/pubmed/2463913?tool=bestpractice.com Há uma pequena preponderância masculina, embora não tenha sido observada uma forte diferença entre os gêneros.