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In a validation study (study 1), 407 healthy and 17 anosmic volunteers between 15 and 91 years of age underwent threshold, supraliminal detection, and identification testing. Cutoff values for normosmia and hyposmia were calculated and applied in a second study in a group of patients with smell complaints and in a group of Alzheimer patients with age-matched controls. Incidence of smell deficit was estimated at 5.6% in the healthy population of study 1, and at 16% in the elderly control group of study 2. Assessment of the ability of each subtest to discriminate between groups showed that LCOT is relevant to differentiating between perception and identification deficits and between Alzheimer's and hyposmic patients.<\/jats:p>","DOI":"10.1155\/2011\/203805","type":"journal-article","created":{"date-parts":[[2011,10,20]],"date-time":"2011-10-20T15:01:22Z","timestamp":1319122882000},"page":"1-9","source":"Crossref","is-referenced-by-count":24,"title":["The Lyon Clinical Olfactory Test: Validation and Measurement of Hyposmia and Anosmia in Healthy and Diseased Populations"],"prefix":"10.1155","volume":"2011","author":[{"given":"Catherine","family":"Rouby","sequence":"first","affiliation":[{"name":"Centre de Recherche en Neuroscience de Lyon, CNRS UMR 5292-INSERM U1028 and Universit\u00e9 Claude Bernard Lyon 1, Universit\u00e9 de Lyon, 69366 Lyon Cedex 07, 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