Title |
Psychometric properties of a new treatment expectation scale in rheumatoid arthritis: an application of item response theory
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Published in |
BMC Musculoskeletal Disorders, September 2015
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DOI | 10.1186/s12891-015-0690-3 |
Pubmed ID | |
Authors |
Fowzia Ibrahim, Salma Ayis, Darija Hofmann, Diana Rose, Til Wykes, Andrew Cope, David L. Scott, Heidi Lempp |
Abstract |
Patient-generated health outcome measures are important in the assessment of long-term treatment goals for Rheumatoid Arthritis (RA), but few psychometrically sound measures are available. The MAPLe-RA (Measuring Actual Patient-Led expectations in RA) is a new questionnaire and its psychometric properties are not investigated. This study aims to examine these properties for each of the items using Item Response Theory (IRT) . Participants were included if they completed the scale (MAPLe-RA). A one parameter (Rasch) model and a two parameter logistic (2PL) model were applied to these data using M-plus software. One hundred thirty-eight patients with RA were included in the analysis. MAPLe-RA scale comprised of 21 items, the mean score was 71 (20.28) ranging from 0 to 105. Most items operated in the high expectations part of the items characteristics curves (ICC). Item discrimination varied widely, items with the highest discrimination capacity from the three domains were: pain (physical domain); control of my RA (self-management) and maintaining social role (psycho-social domain); feeling better overall and involvement in treatment decision making (impact of new treatment domain). RA patients' expectations of treatment are higher in the physical and psycho-social domains and less so in the impact of new treatment domain. |
X Demographics
Geographical breakdown
Country | Count | As % |
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United States | 2 | 67% |
Unknown | 1 | 33% |
Demographic breakdown
Type | Count | As % |
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Members of the public | 2 | 67% |
Practitioners (doctors, other healthcare professionals) | 1 | 33% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
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United Kingdom | 1 | 3% |
Unknown | 35 | 97% |
Demographic breakdown
Readers by professional status | Count | As % |
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Researcher | 5 | 14% |
Student > Ph. D. Student | 4 | 11% |
Student > Master | 4 | 11% |
Other | 2 | 6% |
Student > Postgraduate | 2 | 6% |
Other | 10 | 28% |
Unknown | 9 | 25% |
Readers by discipline | Count | As % |
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Psychology | 6 | 17% |
Medicine and Dentistry | 4 | 11% |
Social Sciences | 3 | 8% |
Nursing and Health Professions | 3 | 8% |
Business, Management and Accounting | 1 | 3% |
Other | 6 | 17% |
Unknown | 13 | 36% |