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The DOI matches its Crossref record; 5 of the 5 references it cites were found in a registry or an index.

Unified Parkinson's disease rating scale characteristics and structure

Martínez‐Martín, P., Gil‐Nagel, A., Gracia, L. Morlán, Gómez, J. Balseiro, Martínez‐Sarriés, J., Bermejo, F., The Cooperative Multicentric Group·1994·Movement Disorders

Abstract

Our purpose was to verify some basic aspects of validation of the Unified Parkinson's Disease Rating Scale (UPDRS). One hundred and sixtyseven Parkinson's disease (PD) patients were included. Group A (n=40) was simultaneously assessed by five raters who applied the UPDRS and other PD rating scales (PDRS). A set of timed tests, the Mini‐Mental State Examination (MMSE), and the Hamilton Scale for Depression (HSD) were administered by an independent examiner. Group B (n = 127) was individually assessed through the UPDRS and the other PDRSs by one neurologist in four different hospitals. The UPDRS was administered in 16.95 ± 7.98 min. The internal consistency was high (Cronbach's alpha = 0.96). Nevertheless, the items related to depression, motivation/initiative, and tremor were scarcely consistent. The Interrater reliability was satisfactory (all the items had k > 0.40). There was a high correlation of the UPDRS with the Hoehn and Yahr staging (r s = 0.71; p < 0.001) and some timed tests (finger tapping; arising from chair), but also with the MMSE and HSD (r s = 0.53; r s = 0.64; p < 0.001). The convergent validity with the other PDRS (Intermediate Scale and Schwab and England Scale) was very high (r s = 0.76−0.96; p < 0.001). The factor analysis identified six factors that explained 59.6% of the variance. The dimension “tremor” showed a remarkable independence. The UPDRS is a multidimensional, reliable, and valid scale, with some inconveniences derived from its internal consistency, discriminant validity, and pragmatic application.

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Research works printed but not linked: 25

  1. Martínez‐Martín P, 1993, Parkinson's disease and movement disorders, 281
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Metadata

Authors
Martínez‐Martín, P., Gil‐Nagel, A., Gracia, L. M., Gómez, J. B., Martínez‐Sarriés, J., Bermejo, F., & The Cooperative Multicentric Group
Venue
Movement Disorders
Publisher
Wiley
Published
1994-01
Volume
9
Issue
1
Pages
76-83
ISSN
  • 0885-3185 (ISSN-L)
  • 1531-8257
OpenAlex
W2031547184
Cited by
796
References
5
FWCI
5.56
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Unified Parkinson's disease rating scale characteristics and structure. https://app.cochat.ai/papers/10.1002/mds.870090112
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Martínez‐Martín, P., Gil‐Nagel, A., Gracia, L. M., Gómez, J. B., Martínez‐Sarriés, J., Bermejo, F., & The Cooperative Multicentric Group. (1994). Unified Parkinson's disease rating scale characteristics and structure. Movement Disorders. https://doi.org/10.1002/mds.870090112

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