The “Not Otherwise Specified” (NOS) category within DSM-IV is designed for disorders of clinical severity that are not specified within broad diagnostic ...NCBISkiptomaincontentSkiptonavigationResourcesHowToAboutNCBIAccesskeysMyNCBISignintoNCBISignOutTryoutPMCLabsandtelluswhatyouthink.LearnMore.JournalListElsevierSponsoredDocumentsPMC2785872SponsoredDocumentfromBehaviourResearchandTherapyBehavResTher.2005Jun;43(6):691–701.doi: 10.1016/j.brat.2004.06.011PMCID:PMC2785872PMID:15890163EatingdisorderNOS(EDNOS):anexampleofthetroublesome“nototherwisespecified”(NOS)categoryinDSM-IVChristopherG.Fairburn*andKristinBohnAuthorinformationArticlenotesCopyrightandLicenseinformationDisclaimerDepartmentofPsychiatry,WarnefordHospital,OxfordUniversity,OxfordOX37JX,UKChristopherG.Fairburn:ku.ca.xo.enicidem@oderc*Correspondingauthor.Tel.:+44-1865-226479;fax:+44-1865-226244.ku.ca.xo.enicidem@odercReceived2004Jun12;Accepted2004Jun18.Copyright©2004ElsevierLtd.Allrightsreserved.ThisisanopenaccessarticleundertheCCBYlicense(http://creativecommons.org/licenses/by/3.0/).ThisarticlehasbeencitedbyotherarticlesinPMC.The“NotOtherwiseSpecified”(NOS)categorywithinDSM-IVisdesignedfordisordersofclinicalseveritythatarenotspecifiedwithinbroaddiagnosticclasses.“NOS”diagnosesareintendedtoberesidualcategoriesandtheytendtobeneglectedbyresearchers.Thiscanbeinappropriate.TheproblemsassociatedwithcertainNOSdiagnosesarewellillustratedby“EatingDisorderNOS”(sometimestermedEDNOS),whichisthemostcommoncategoryofeatingdisorderencounteredinroutineclinicalpracticeyetithasbarelybeenstudied.Indeed,therehasbeennoresearchonitstreatment.Interimandlonger-termconceptualandpracticalsolutionstotheanomalousstatusofeatingdisorderNOSareproposedincludingthecreationofanewdiagnosistermed“mixedeatingdisorder”.SeveralofthesesolutionsareofrelevancetoNOScategoriesingeneral.Allthesolutionsshouldfulfilcriteriaforclinicalutility.Keywords:DSM-IV,NOS,Eatingdisorder,Diagnosis,Classification,ClinicalutilityTheDSM-IVdiagnosis“EatingDisorderNotOth