Journal:Journal of Spinal Cord Medicine
Year, Volume, Issue, Page(s):14, 1, 38, 356-365
Article describes the development and psychometric properties of the Spinal Cord Injury – Quality of Life (SCI-QOL) Positive Affect and Well-Being (PAWB) item bank and short form. Qualitative feedback from patient and provider focus groups was used to expand on the Neurological Disorders and Quality of Life (Neuro-QOL) positive affect and well-being item bank for use in SCI. New items were created and revised based on expert review and patient feedback and were then field tested. Analyses included confirmatory factor analysis, item response theory calibration, and evaluation of differential item functioning (DIF). A 32-item pool at several rehabilitation centers across the United States, including 5 SCI Model System centers and one Veterans Affairs medical center. A total of 717 individuals with SCI answered the PAWB questions. A unidimensional model was observed and measurement precision was good. Twelve items were flagged for DIF, however, after examination of effect sizes, the DIF was determined to be negligible and would have little practical impact on score estimates. The final calibrated item bank resulted in 28 retained items. The SCI-QOL PAWB bank represents a psychometrically robust measurement tool. Short form items are also suggested and a computer adaptive test is available.