Title | Six patient-reported outcome measurement information system short form measures have negligible age- or diagnosis-related differential item functioning in individuals with disabilities. |
Publication Type | Journal Article |
2012 | |
Authors | Cook KF, Bamer AM, Amtmann D, Molton IR, Jensen MP |
Journal | Archives of Physical Medicine and Rehabilitation |
Volume | 93 |
Issue | 7 |
Pagination | 1289-91 |
Date Published | 2012 Jul |
ISSN | 1532-821X |
UNLABELLED: Cook KF, Bamer AM, Amtmann D, Molton IR, Jensen MP. Six Patient-Reported Outcome Measurement Information System short form measures have negligible age- or diagnosis-related differential item functioning in individuals with disabilities. OBJECTIVE: To evaluate the measurement invariance of 6 self-report measures selected for an ongoing longitudinal study of individuals with spinal cord injury, muscular dystrophy, postpolio syndrome, and multiple sclerosis. DESIGN: Participants completed and returned by mail surveys that included the targeted self-report measures. Ordinal logistic regressions methods were applied to evaluate items for differential item functioning (DIF) by diagnosis and age range. SETTING: Community. PARTICIPANTS: Participants (N=2479) who had 1 of the 4 target diagnoses. INTERVENTIONS: None. MAIN OUTCOME MEASURES: Six short-form measures from the Patient-Reported Outcome Measurement Information System (PROMIS) were administered to participants to measure fatigue, pain interference, satisfaction with social roles, sleep disturbance, sleep-related impairment, and depression. RESULTS: One item of 1 measure (fatigue) exhibited DIF by diagnosis based on a published standard for meaningful DIF. However, scores corrected for this DIF were highly correlated with uncorrected scores (r>.999). No DIF by age range was found for any of the measures. CONCLUSIONS: Study findings support the use of the selected PROMIS short forms for comparing symptoms and quality of life indicators across different diagnoses and age ranges. | |
10.1016/j.apmr.2011.11.022 | |
PubMed ID | 22386213 |