Journal article
An item response analysis of the motor and behavioral subscales of the unified Huntington's disease rating scale in huntington disease gene expansion carriers
Movement disorders, Vol.26(5), pp.877-884
04/2011
DOI: 10.1002/mds.23574
PMCID: PMC3157755
PMID: 21370269
Abstract
Although the Unified Huntington's Disease Rating Scale (UHDRS) is widely used in the assessment of Huntington disease (HD), the ability of individual items to discriminate individual differences in motor or behavioral manifestations has not been extensively studied in HD gene expansion carriers without a motor-defined clinical diagnosis (ie, prodromal-HD or prHD). To elucidate the relationship between scores on individual motor and behavioral UHDRS items and total score for each subscale, a nonparametric item response analysis was performed on retrospective data from 2 multicenter longitudinal studies. Motor and behavioral assessments were supplied for 737 prHD individuals with data from 2114 visits (PREDICT-HD) and 686 HD individuals with data from 1482 visits (REGISTRY). Option characteristic curves were generated for UHDRS subscale items in relation to their subscale score. In prHD, overall severity of motor signs was low, and participants had scores of 2 or above on very few items. In HD, motor items that assessed ocular pursuit, saccade initiation, finger tapping, tandem walking, and to a lesser extent, saccade velocity, dysarthria, tongue protrusion, pronation/supination, Luria, bradykinesia, choreas, gait, and balance on the retropulsion test were found to discriminate individual differences across a broad range of motor severity. In prHD, depressed mood, anxiety, and irritable behavior demonstrated good discriminative properties. In HD, depressed mood demonstrated a good relationship with the overall behavioral score. These data suggest that at least some UHDRS items appear to have utility across a broad range of severity, although many items demonstrate problematic features.
Details
- Title: Subtitle
- An item response analysis of the motor and behavioral subscales of the unified Huntington's disease rating scale in huntington disease gene expansion carriers
- Creators
- Anthony L Vaccarino - Ovarian Cancer CanadaKaren Anderson - University of Maryland, BaltimoreBeth Borowsky - CHDI FoundationKevin Duff - University of UtahJoseph Giuliano - CHDI FoundationMark Guttman - Centre for Movement DisordersAileen K Ho - University of ReadingMichael Orth - The Huntington Library, Art Museum, and Botanical GardensJane S Paulsen - University of IowaTerrence Sills - Ovarian Cancer CanadaDaniel P van Kammen - CHDI FoundationKenneth R EvansPREDICT-HD and REGISTRY Investigators Coordinators
- Resource Type
- Journal article
- Publication Details
- Movement disorders, Vol.26(5), pp.877-884
- DOI
- 10.1002/mds.23574
- PMID
- 21370269
- PMCID
- PMC3157755
- ISSN
- 0885-3185
- eISSN
- 1531-8257
- Grant note
- R01 NS040068 / NINDS NIH HHS R01 NS040068-11 / NINDS NIH HHS
- Language
- English
- Date published
- 04/2011
- Academic Unit
- Psychiatry; Psychological and Brain Sciences
- Record Identifier
- 9984383310402771
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