Paper I: Epilepsia 41(7), Waaler, P. E., Blom, B. H., Skeidsvoll, K., Mykletun, A., Prevalence, Classification and Severity of Epilepsy in Children in Western Norway, pp. 802-810. Copyright 2000 the International League Against Epilepsy. Published by Blackwell Publishing. Fulltext not available due to publisher restrictions. Published version available at: http://dx.doi.org/10.1111/j.1528-1157.2000.tb00246.xPaper II: Seizure 14, Høie, B., Mykletun, A., Sommerfelt, K., Bjørnæs, H., Skeidsvoll, H., Waaler, P. E., Seizurerelated factors and non-verbal intelligence in children in Western Norway, pp. 223-231. Copyright 2005 Elsevier.Paper III: Developmental Medicine and Child Neurology 48, Høie, B., Sommerfelt, K., Waaler, P. E., Alsaker, F. C., Skeidsvoll, H., Mykletun, A., Psychosocial problems and seizure related factors in children with epilepsy in Western Norway, pp. 213-219. Published 2006 by Cambridge University Press. Copyright © 2006 Mac Keith PressPaper IV: Developmental Medicine and Child Neurology 48, Høie, B., Mykletun, A., Skeidsvoll, H., Waaler, P. E., Sommerfelt, K., Executive functions and Seizure related factors in children with epilepsy, pp. 519-25. Published 2006 by Cambridge University Press. Copyright © 2006 Mac Keith Press. Published version available at: http://dx.doi.org/10.1017/S0012162206001095