Abstract
Purpose
This study investigated the PROMIS Self-Efficacy Measure for Managing Chronic Conditions (PROMIS-SE) domain distributions and examined the factor structure of the PROMIS-SE.
Methods
A total of 1087 individuals with chronic conditions participated in this study. PROMIS-SE’s item banks and two short forms (eight-item and four-item) measuring five behavioral domains (daily activities(DA), Emotions(EM), medications and treatments(MT), social interactions(SS), and Symptoms(SX)) were examined. PROMIS-SE’s T-score ranges and distributions were examined to identify domain metric distributions and confirmatory factor analysis (CFA) was conducted to test a multidimensional model fit to the PROMIS-SE.
Results
PROMIS-SE domains showed different T-score ranges and distributions for item banks and two short forms across all five domains. While PROMIS-SE EM demonstrated the highest T-scores (least negatively skewed), MT had the lowest T-scores (most negatively skewed) for all three forms. In general, respondents were more likely to achieve highest self-efficacy ratings (very confident) for domains DA, MT, and SS as compared to domains EM and SX. CFA confirmed that a multidimensional model adequately fit all three PROMIS-SE forms.
Conclusion
Our results indicate that self-efficacy T-distributions are not consistent across domains (i.e., managing medications and treatments domain was more negatively skewed difficult than other domains), which is a requirement for making inter-domain comparisons. A multidimensional model could be used to enhance the PROMIS-SE’s estimate accuracy and clinical utility.
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Funding
The study was funded by the National Institutes of Health, Development and Validation of a Self–Efficacy Item Bank (Grant No. 1U01AR057967-01, Lisa Shulman (PI)). The presented results and conclusions in this paper are from the authors; the findings from this study are independent from the funding source. The fully developed measures of self-efficacy for self-management of chronic diseases can be found at http://www.healthmeasures.net/.
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This study was approved by the Institutional review boards (IRB) of the Medical University of South Carolina (#Pro00033397), the University of Florida (#261–2010), and the University of Maryland (#HP-000432550). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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All participants were treated and reimbursed as consultants. Therefore, informed consent was not required.
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Lee, M.J., Romero, S., Velozo, C.A. et al. Multidimensionality of the PROMIS self-efficacy measure for managing chronic conditions. Qual Life Res 28, 1595–1603 (2019). https://doi.org/10.1007/s11136-019-02116-w
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DOI: https://doi.org/10.1007/s11136-019-02116-w