Journal:Journal of Spinal Cord Medicine
Year, Volume, Issue, Page(s):15, 1, 38, 326-334
Article describes the development and psychometric properties of the Spinal Cord Injury – Quality of Life (SCI-QOL) Psychological Trauma item bank and short form. Using a mixed-methods design, a Psychological Trauma item bank was developed and tested with patient and provider focus groups and cognitive interviews. A 31-item pool was tested at several medical institutions across the United States, including 5 SCI Model System centers and one Veterans Affairs medical center. A total of 716 individuals with SCI completed the items assessing trauma. Analyses included item response theory based analytic approaches, including tests of model fit, differential item functioning (DIF) and precision. The 31 items fit a unidimensional model and demonstrated good precision. Nine items demonstrated negligible DIF with little impact on score estimates. The final calibrated item bank contains 19 items. The SCI-QOL Psychological Trauma item bank is a psychometrically robust measurement tool from which a short form and a computer adaptive test version are available.