title: The lyon clinical olfactory test: validation and measurement of hyposmia and anosmia in healthy and diseased populations.
abstract: The LCOT is a self-administered test designed to assess olfactory deficits. Altogether, 525 subjects contributed to the validation. Elderly participants were well represented in this sample. 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.
authors: Centre de Recherche en Neuroscience de Lyon, CNRS UMR 5292-INSERM U1028 and Université Claude Bernard Lyon 1, Université de Lyon, 69366 Lyon Cedex 07, France.
authors: Catherine
authors: C
authors: Rouby
authors: Thierry
authors: T
authors: Thomas-Danguin
authors: Michel
authors: M
authors: Vigouroux
authors: Gabriela
authors: G
authors: Ciuperca
authors: Tao
authors: T
authors: Jiang
authors: Jérôme
authors: J
authors: Alexanian
authors: Mathieu
authors: M
authors: Barges
authors: Isabelle
authors: I
authors: Gallice
authors: Jean-Louis
authors: JL
authors: Degraix
authors: Gilles
authors: G
authors: Sicard