UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

The Use of a Color Coded Probability Scale to Interpret Smell Tests in Suspected Parkinsonism

Silveira-Moriyama, L; Petrie, A; Williams, DR; Evans, A; Katzenschlager, R; Barbosa, ER; Lees, AJ; (2009) The Use of a Color Coded Probability Scale to Interpret Smell Tests in Suspected Parkinsonism. MOVEMENT DISORD , 24 (8) 1144 - 1153. 10.1002/mds.22494.

Full text not available from this repository.

Abstract

Smell identification tests (SITs) have been suggested as useful in the differential diagnosis of Parkinson's disease (PD). We have applied the 40 item University of Pennsylvania SIT (UPSIT-40) and/or the 16 item SIT from Sniffin Sticks (SS-16) to 193 nondemented PD patients and 157 controls and used logistic regression analysis to associate the SIT result with the probability of an individual patient having PD ("PD probability"). Reliability measures (95% CI) using the clinical diagnosis as a gold standard and a dichotomized result of the smell test into high (50% or more) or low (<50%) "PD probability" were: sensitivity 85.0% (78.8-89.7%), specificity 84.6% (77.3-89.9%) for the UPSIT-40; sensitivity 90.4% (83.5-94.7%), specificity 85.5% (76.2-91.7%) for the SS-16. Based on these findings we have created color coded visual tools (PD probability rulers) and applied them to 39 clinically uncertain parkinsonian syndromes (CUPS) patients who had been investigated with dopamine transporter SPECT scanning using [123-I]-FP-CIT SPECT (DaTSCAN) for suspected Parkinson's disease. In 32 of 36 CUPS cases (88.9%, kappa = 0.72) the probability ruler predicted the result of the DaTSCAN. We suggest smell tests could be used routinely in challenging cases where there is diagnostic uncertainty and help inform decision making relating to the need for neuro imaging. (C) 2009 Movement Disorder Society

Type:Article
Title:The Use of a Color Coded Probability Scale to Interpret Smell Tests in Suspected Parkinsonism
DOI:10.1002/mds.22494
Keywords:Parkinson's disease, parkinsonism, DaTSCAN, UPSIT, sniffin, sticks, olfaction, DISTINGUISHES VASCULAR PARKINSONISM, MULTIPLE SYSTEM ATROPHY, OLFACTORY FUNCTION, ESSENTIAL TREMOR, DISEASE DURATION, ODOR IDENTIFICATION, SNIFFIN STICKS, REST TREMOR, LEWY BODY, DIAGNOSIS
UCL classification:UCL > School of Life and Medical Sciences > Faculty of Brain Sciences > Institute of Neurology > Molecular Neuroscience
UCL > School of Life and Medical Sciences > Faculty of Brain Sciences > Institute of Neurology > RLW Institute of Neurological Sciences
UCL > School of Life and Medical Sciences > Faculty of Medical Sciences > Eastman Dental Institute

Archive Staff Only: edit this record