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Moreover, we found that the outcome of the operation depended on patient selection criteria. When three or more of the following preoperative signs were present (known cause, short history, low cerebrospinal fluid outflow, small sulci and\/or periventricular hypodensity indicated by computed tomography), an improvement in cognitive function was seen in 80% of the patients after a shunt operation.<\/jats:p>","DOI":"10.1002\/ana.410200306","type":"journal-article","created":{"date-parts":[[2005,1,1]],"date-time":"2005-01-01T17:34:45Z","timestamp":1104600885000},"page":"304-310","source":"Crossref","is-referenced-by-count":109,"title":["Prognosis of dementia in normal\u2010pressure hydrocephalus after a shunt operation"],"prefix":"10.1002","volume":"20","author":[{"given":"A. M.","family":"Thomsen","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S. 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