Developing an Item Bank to Measure Economic Quality of Life for Individuals with Disabilities

Overview

Journal Arch Phys Med Rehabil

Specialty Rehabilitation Medicine

Date 2014 Apr 17

PMID 24736400

Citations 13

Authors

David S Tulsky

Pamela A Kisala

Jin-Shei Lai

Noelle Carlozzi

Joy Hammel

Allen W Heinemann

Affiliations

Soon will be listed here.

Abstract

Objective: To develop and evaluate the psychometric properties of an item set measuring economic quality of life (QOL) for use by individuals with disabilities.

Design: Survey.

Setting: Community settings.

Participants: Individuals with disabilities completed individual interviews (n=64), participated in focus groups (n=172), and completed cognitive interviews (n=15). Inclusion criteria included the following: traumatic brain injury, spinal cord injury, or stroke; age ≥18 years; and ability to read and speak English. We calibrated the items with 305 former rehabilitation inpatients.

Interventions: None.

Main Outcome Measure: Economic QOL.

Results: Confirmatory factor analysis showed acceptable fit indices (comparative fit index=.939, root mean square error of approximation=.089) for the 37 items. However, 3 items demonstrated local item dependence. Dropping 9 items improved fit and obviated local dependence. Rasch analysis of the remaining 28 items yielded a person reliability of .92, suggesting that these items discriminate about 4 economic QOL levels.

Conclusions: We developed a 28-item bank that measures economic aspects of QOL. Preliminary confirmatory factor analysis and Rasch analysis results support the psychometric properties of this new measure. It fills a gap in health-related QOL measurement by describing the economic barriers and facilitators of community participation. Future development will make the item bank available as a computer adaptive test.

Citing Articles

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