Journal article
Evaluation of the Pain Impact Index for Community-Dwelling Older Adults Through the Application of Rasch Modelling
JFM Gilmartin-Thomas, A Forbes, D Liew, JJ McNeil, FM Cicuttini, AJ Owen, ME Ernst, MR Nelson, J Lockery, SA Ward, L Busija
Pain Practice | WILEY | Published : 2021
DOI: 10.1111/papr.12980
Abstract
Objective: Evaluate the Pain Impact Index, a simple, brief, easy-to-use, and novel tool to assess the impact of chronic pain in community-dwelling older adults. Methods: A Rasch modelling analysis was undertaken in Stata using a partial credit model suited to the Likert-type items that comprised the Index. The Index was evaluated for ordering of category thresholds, unidimensionality, overall fit to the Rasch model, measurement bias (Differential Item Functioning, DIF), targeting, and construct validity. Results: The four-item Pain Impact Index was self-completed by 6454 community-dwelling Australians who were aged at least 70 years and experienced pain on most days. Two items showed evidenc..
View full abstractGrants
Awarded by National Institutes of Health
Funding Acknowledgements
ALSOP was supported by funding from Monash University, ANZ Trustees, the Wicking Trust, and the Mason Foundation. The ASPREE trial was supported by a grant (U01AG029824) from the National Institute on Aging and the National Cancer Institute at the National Institutes of Health, by grants (334047 and 1127060) from the National Health and Medical Research Council of Australia, and by Monash University and the Victorian Cancer Agency.