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The Parkinson's Disease Composite Scale: results of the first validation study.

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Title: The Parkinson's Disease Composite Scale: results of the first validation study.
Authors: Stocchi, F., Radicati, F. G., Chaudhuri, K. R., Johansson, A., Padmakumar, C., Falup‐Pecurariu, C., Martinez‐Martin, P.
Source: European Journal of Neurology. Mar2018, Vol. 25 Issue 3, p503-511. 9p. 6 Charts.
Subjects: Movement disorders, Symptoms, Parkinson's disease, Psychiatric rating scales, Validity of statistics
Abstract: Background and purpose: The aim was to validate the Parkinson's Disease Composite Scale (PDCS). Methods: The study included 194 Parkinson's disease (PD) patients in five countries. Investigators completed the following scales: PDCS, the Movement Disorder Society Unified Parkinson's Disease Rating Scale (MDS‐UPDRS), Parkinson's Disease Sleep Scale Version 2, Montreal Cognitive Assessment, the Scale for Evaluation of Neuropsychiatric Disorders in Parkinson's Disease and the Clinical Impression of Severity Index for PD (CISI‐PD). For test−retest analysis, a second administration of the PDCS was carried out in 61 stable patients (as per the CISI‐PD) in 7–14 days after the first evaluation. The PDCS is a novel scale for PD with a total of 17 items divided into four domains: motor, non‐motor, treatment complications and disability. Results: Parkinson's Disease Composite Scale mean and median values were close. Skewness values were into the criterion limits (−1 to +1). The complete range of scores was covered for 14 of the 17 items (83.4%). A floor effect of 25.26% and 28.25% was observed in the complications and disability level dimensions due to the proportion of patients free of these difficulties. No relevant floor or ceiling effect was observed for the PDCS total score (1.03% and 0.52%, respectively). The stability of the scale appeared excellent with most items meeting weighted kappa and intraclass correlation coefficient values >0.80. The convergent validity of the PDCS with corresponding scores of the MDS‐UPDRS showed high correlation values (rS ≥ 0.60). The internal validity was into acceptable limits, with the majority of values higher than the minimal 0.30 threshold. The standard error of measurement suggested a satisfactory precision (SEM 3.81, <30% of the PDCS total score standard deviation). Conclusion: The PDCS appears to be a feasible, acceptable, reproducible and valid scale. [ABSTRACT FROM AUTHOR]
Copyright of European Journal of Neurology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: The Parkinson&#39;s Disease Composite Scale: results of the first validation study.
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  Data: &lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Stocchi%2C+F%2E%22&quot;&gt;Stocchi, F.&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Radicati%2C+F%2E+G%2E%22&quot;&gt;Radicati, F. G.&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Chaudhuri%2C+K%2E+R%2E%22&quot;&gt;Chaudhuri, K. R.&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Johansson%2C+A%2E%22&quot;&gt;Johansson, A.&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Padmakumar%2C+C%2E%22&quot;&gt;Padmakumar, C.&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Falup‐Pecurariu%2C+C%2E%22&quot;&gt;Falup‐Pecurariu, C.&lt;/searchLink&gt;&lt;br /&gt;&lt;searchLink fieldCode=&quot;AR&quot; term=&quot;%22Martinez‐Martin%2C+P%2E%22&quot;&gt;Martinez‐Martin, P.&lt;/searchLink&gt;
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22European+Journal+of+Neurology%22&quot;&gt;European Journal of Neurology&lt;/searchLink&gt;. Mar2018, Vol. 25 Issue 3, p503-511. 9p. 6 Charts.
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  Data: Background and purpose: The aim was to validate the Parkinson&#39;s Disease Composite Scale (PDCS). Methods: The study included 194 Parkinson&#39;s disease (PD) patients in five countries. Investigators completed the following scales: PDCS, the Movement Disorder Society Unified Parkinson&#39;s Disease Rating Scale (MDS‐UPDRS), Parkinson&#39;s Disease Sleep Scale Version 2, Montreal Cognitive Assessment, the Scale for Evaluation of Neuropsychiatric Disorders in Parkinson&#39;s Disease and the Clinical Impression of Severity Index for PD (CISI‐PD). For test−retest analysis, a second administration of the PDCS was carried out in 61 stable patients (as per the CISI‐PD) in 7–14&#160;days after the first evaluation. The PDCS is a novel scale for PD with a total of 17 items divided into four domains: motor, non‐motor, treatment complications and disability. Results: Parkinson&#39;s Disease Composite Scale mean and median values were close. Skewness values were into the criterion limits (−1 to +1). The complete range of scores was covered for 14 of the 17 items (83.4%). A floor effect of 25.26% and 28.25% was observed in the complications and disability level dimensions due to the proportion of patients free of these difficulties. No relevant floor or ceiling effect was observed for the PDCS total score (1.03% and 0.52%, respectively). The stability of the scale appeared excellent with most items meeting weighted kappa and intraclass correlation coefficient values &gt;0.80. The convergent validity of the PDCS with corresponding scores of the MDS‐UPDRS showed high correlation values (&lt;italic&gt;r&lt;/italic&gt;S&#160;≥&#160;0.60). The internal validity was into acceptable limits, with the majority of values higher than the minimal 0.30 threshold. The standard error of measurement suggested a satisfactory precision (SEM&#160;3.81, &lt;30% of the PDCS total score standard deviation). Conclusion: The PDCS appears to be a feasible, acceptable, reproducible and valid scale. [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of European Journal of Neurology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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        Value: 10.1111/ene.13529
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      – Code: eng
        Text: English
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      – SubjectFull: Movement disorders
        Type: general
      – SubjectFull: Symptoms
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      – SubjectFull: Parkinson's disease
        Type: general
      – SubjectFull: Psychiatric rating scales
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      – SubjectFull: Validity of statistics
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              Text: Mar2018
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