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Results suggest that ethnicity, chronicity of illness and reception of neuroleptic treatment may influence the lower prevalence of catatonic symptoms among the U.K. and Canadian schizophrenics. Onset of illness appears to be among young adults and mutism, stupor, mannerisms, stereotypes and negativism were the common catatonic symptoms observed.<\/jats:p>","DOI":"10.1177\/070674378603100313","type":"journal-article","created":{"date-parts":[[2017,4,26]],"date-time":"2017-04-26T04:32:52Z","timestamp":1493181172000},"page":"249-252","source":"Crossref","is-referenced-by-count":24,"title":["Catatonic Schizophrenia: An International Comparative Study"],"prefix":"10.1177","volume":"31","author":[{"given":"Ranjith","family":"Chandrasena","sequence":"first","affiliation":[{"name":"University of Ottawa, General Adult Inpatient Program, Royal Ottawa Hospital."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[1986,4,1]]},"reference":[{"key":"bibr1-070674378603100313","volume-title":"Die Katatonie oder das Spamungsiesein","author":"Kahlbaum K.L.","year":"1874"},{"key":"bibr2-070674378603100313","volume-title":"Dementia praecox and paraphrenia.","author":"Kraepelin E.","year":"1919"},{"key":"bibr3-070674378603100313","volume-title":"Dementia praecox and the group of schizophrenias (Trans. 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