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Validity of the Workers Productivity and Activity Impairment Questionnaire: Specific Health Problem (WPAI:SHP) in patients with systemic sclerosis
Citation
Morrisroe, K and Stevens, W and Huq, M and Sahhar, J and Ngian, G-S and Zochling, J and Roddy, J and Proudman, SM and Nikpour, M, and the Australian Scleroderma Interest Group (ASIG), Validity of the Workers Productivity and Activity Impairment Questionnaire: Specific Health Problem (WPAI:SHP) in patients with systemic sclerosis, Clinical and Experimental Rheumatology, 35, (Suppl 106) pp. S130-S137. ISSN 0392-856X (2017) [Refereed Article]
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© Clinical and Experimental Rheumatology
Official URL: http://www.clinexprheumatol.org/abstract.asp?a=115...
Abstract
Methods: SSc patients, identified through the Australian Scleroderma Cohort Study database, completed the WPAI:SHP and a quality of life instrument (PROMIS-29) cross-sectionally. The construct validity of the WPAI:SHP was assessed by the correlations between the WPAI:SHP and a range of SSc health states. Non-parametric correlation, including Spearman's correlation (ρ), was used to test the validity of WPAI:SHP and ability to distinguish between different health states.
Results: A total of 476 completed questionnaires was returned, equating to a response rate of 63.7%. Among those under 65 years of age, 155 patients (55.2%) were in paid employment. Employed patients had a mean (± SD) age of 56.5 (9.8) years and were predominantly female (87.3%) with limited disease subtype (75.6%). The WPAI:SHP showed construct validity based on moderate to strong correlations with health status as assessed by a range of health outcome measures including disease activity (ρ = 0.34-0.39, p = 0.001), physical function (ρ = 0.55-0.62, p = 0.001), disease severity (ρ = 0.55-0.62, p = 0.001), fatigue (ρ = 0.62-0.63, p = 0.001), pain (ρ = 0.68-0.71, p = 0.001), and breathlessness (ρ = 0.39-0.46, p = 0.001). Furthermore, according to the effect size, the WPAI:SHP scores have a large discriminative ability (d = 1.26-1.47) for distinguishing SSc patients with different health outcomes.
Conclusions: The WPAI is a valid questionnaire for assessing impairments in paid employment and social activities in SSc patients, and for measuring the relative differences between SSc patients with varying health states.
Item Details
Item Type: | Refereed Article |
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Keywords: | systemic sclerosis, workers productivity and activity impairment questionnaire, absenteeism, presenteeism |
Research Division: | Biomedical and Clinical Sciences |
Research Group: | Clinical sciences |
Research Field: | Rheumatology and arthritis |
Objective Division: | Health |
Objective Group: | Clinical health |
Objective Field: | Clinical health not elsewhere classified |
UTAS Author: | Zochling, J (Dr Jane Zochling) |
ID Code: | 123059 |
Year Published: | 2017 |
Deposited By: | Menzies Institute for Medical Research |
Deposited On: | 2017-12-14 |
Last Modified: | 2018-06-26 |
Downloads: | 0 |
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