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Many studies examining diagnostic stability use structured diagnostic interviews. Less is known about the stability of FEP diagnoses made clinically.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We conducted a retrospective chart review of patients enrolled in a transdiagnostic FEP clinic. For the 96 patients followed clinically at least 2\u2009years, we compared diagnoses at intake and 24\u2009months.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Diagnostic stability was high for bipolar disorder (89%), schizoaffective disorder (89%), and schizophrenia (82%). Psychosis not otherwise specified (13%) was more unstable, with limited baseline differences that would enable clinicians to predict who would convert to a primary psychotic vs affective psychotic disorder.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Our real\u2010world clinical sample shows that FEP diagnoses, with the exception of unspecified psychosis, are diagnostically stable, even without structured diagnostic interviews.<\/jats:p><\/jats:sec>","DOI":"10.1111\/eip.12930","type":"journal-article","created":{"date-parts":[[2020,2,11]],"date-time":"2020-02-11T01:59:13Z","timestamp":1581386353000},"page":"751-754","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Two\u2010year diagnostic stability in a real\u2010world sample of individuals with early psychosis"],"prefix":"10.1111","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7873-1896","authenticated-orcid":false,"given":"Philip B.","family":"Cawkwell","sequence":"first","affiliation":[{"name":"Psychotic Disorders Division McLean Hospital  Belmont Massachusetts"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kirsten W.","family":"Bolton","sequence":"additional","affiliation":[{"name":"Psychotic Disorders Division McLean Hospital  Belmont Massachusetts"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rakesh","family":"Karmacharya","sequence":"additional","affiliation":[{"name":"Psychotic Disorders Division McLean Hospital  Belmont Massachusetts"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dost","family":"\u00d6ng\u00fcr","sequence":"additional","affiliation":[{"name":"Psychotic Disorders Division McLean Hospital  Belmont Massachusetts"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ann K.","family":"Shinn","sequence":"additional","affiliation":[{"name":"Psychotic Disorders Division McLean Hospital  Belmont 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