Quality of Life Research

, Volume 22, Issue 3, pp 501–507

Measurement invariance of the PROMIS pain interference item bank across community and clinical samples

  • Jiseon Kim
  • Hyewon Chung
  • Dagmar Amtmann
  • Dennis A. Revicki
  • Karon F. Cook
Article

DOI: 10.1007/s11136-012-0191-x

Cite this article as:
Kim, J., Chung, H., Amtmann, D. et al. Qual Life Res (2013) 22: 501. doi:10.1007/s11136-012-0191-x

Abstract

Purpose

This study examined the measurement invariance of responses to the patient-reported outcomes measurement information system (PROMIS) pain interference (PI) item bank. The original PROMIS calibration sample (Wave I) was augmented with a sample of persons recruited from the American Chronic Pain Association (ACPA) to increase the number of participants reporting higher levels of pain. Establishing measurement invariance of an item bank is essential for the valid interpretation of group differences in the latent concept being measured.

Methods

Multi-group confirmatory factor analysis (MG-CFA) was used to evaluate successive levels of measurement invariance: configural, metric, and scalar invariance.

Results

Support was found for configural and metric invariance of the PROMIS-PI, but not for scalar invariance.

Conclusions and recommendations

Based on our results of MG-CFA, we recommend retaining the original parameter estimates obtained by combining the community sample of Wave I and ACPA participants. Future studies should extend this study by examining measurement equivalence in an item response theory framework such as differential item functioning analysis.

Keywords

Factor analysis Pain interference Pain measurement Patient outcome measures Psychometrics 

Abbreviations

ACPA

American Chronic Pain Association

CFA

Confirmatory factor analysis

IRT

Item response theory

MG-CFA

Multi-group confirmatory factor analysis

PI

Pain interference

PROMIS

Patient-Reported Outcomes Measurement Information System

Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Jiseon Kim
    • 1
  • Hyewon Chung
    • 2
  • Dagmar Amtmann
    • 1
  • Dennis A. Revicki
    • 3
  • Karon F. Cook
    • 4
  1. 1.Department of Rehabilitation MedicineUniversity of WashingtonSeattleUSA
  2. 2.Department of EducationChungnam National UniversityDaejeonKorea
  3. 3.Center for Health Outcomes ResearchUnited BioSource CorporationBethesdaUSA
  4. 4.Department of Medical Social SciencesNorthwestern University, Feinberg School of MedicineChicagoUSA