| ROC area discrimination (ROCAD) curve: a new method of evaluating the discriminating ability of ordinal scales. | |
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MedLine Citation:
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PMID: 18539430 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVE: The area under the receiver operating characteristic (ROC) curve has been frequently used to assess the ability of diagnostic tests to discriminate between individuals with and without a disease. In this paper, we propose to use the ROC area to evaluate the discriminating power of ordinal measures, such as many subjective ratings or multioption questionnaire items. STUDY DESIGN AND SETTING: Applications of the method are illustrated with examples from a study designed to select multioption items for a quality-of-life questionnaire in persons with arthritis. RESULTS: DISCRIMINATION was defined as the ability to discriminate between subjects above and below a given threshold value for the attribute being measured. The ROC curve for an ordinal scale was obtained for each observed value of the attribute and the areas under the ROC curves were estimated and plotted on a graph. The resultant curve is referred to as the ROC Area Discrimination (ROCAD) curve. In contrast to standard measures of validity for ordinal scales, such as a correlation coefficient, the ROCAD curve describes the performance of the scale for each point along the spectrum of the measured attribute. CONCLUSION: ROCAD curves can be useful in evaluating the discriminating power of ordinal scales. |
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Authors:
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Jacek A Kopec; Eric C Sayre |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2008-06-09 |
Journal Detail:
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Title: Journal of clinical epidemiology Volume: 61 ISSN: 1878-5921 ISO Abbreviation: J Clin Epidemiol Publication Date: 2008 Oct |
Date Detail:
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Created Date: 2008-09-02 Completed Date: 2008-12-16 Revised Date: 2010-03-24 |
Medline Journal Info:
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Nlm Unique ID: 8801383 Medline TA: J Clin Epidemiol Country: England |
Other Details:
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Languages: eng Pagination: 997-1003.e1 Citation Subset: IM |
Affiliation:
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Department of Health Care and Epidemiology, University of British Columbia, Arthritis Research Centre of Canada, Vancouver, BC, Canada. jkopec@arthritisresearch.ca |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Activities of Daily Living Arthritis / rehabilitation Data Interpretation, Statistical Humans Pain Measurement Questionnaires* ROC Curve* Reproducibility of Results |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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