A multidimensional Rasch analysis of the screener and opioid assessment for patients with pain-revised

Courtney Morris, PhD; Kathy E. Green, PhD; Richa Ghevarghese, PhC

doi:10.5055/jom.2020.0583

Authors

Courtney Morris, PhD
Kathy E. Green, PhD
Richa Ghevarghese, PhC

DOI:

https://doi.org/10.5055/jom.2020.0583

Keywords:

Rasch analysis, SOAAP-R, psychometrics, dimensionality

Abstract

Objective: Pilot study to assess psychometric indices of the screener and opioid assessment for patients with pain-revised (SOAPP-R ©) with item response theory.

Design: Correlational.

Setting: Patients.

Outcome measures: The SOAPP-R©, the pain self-efficacy questionnaire (PSE-Q), and the patient health questionnaire-9 (PHQ-9) and a demographic questionnaire.

Results: A three-dimensional model provided the best fit for the SOAPP-R© item responses, with scales entitled drug-alcohol concerns, pain medication, and emotional stress; reliabilities were 0.77, 0.71, and 0.80 for those three scales. Significant correlations were found with the PSE-Q, the PHQ-9, and the SPQ for the drug-alcohol scale but not for the two remaining scales.

Conclusions: The SOAPP-R© showed invariance and support for validity, but with a three-dimensional scale structure.

Author Biographies

Courtney Morris, PhD

Department of Psychology, Longmeadow, Massachusetts

Kathy E. Green, PhD

Research Methods and Information Science, University of Denver, Denver, Colorado

Richa Ghevarghese, PhC

Research Methods and Information Science, University of Denver, Denver, Colorado

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