1. Linking the GAD-7 and PHQ-9 to the TBI-QOL Anxiety and Depression Item Banks.
- Author
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Boulton AJ, Tyner CE, Choi SW, Sander AM, Heinemann AW, Bushnik T, Chiaravalloti N, Sherer M, Kisala PA, and Tulsky DS
- Subjects
- Adult, Cohort Studies, Female, Humans, Male, Middle Aged, Quality of Life, Anxiety psychology, Anxiety Disorders psychology, Brain Injuries, Traumatic psychology, Depression psychology, Depressive Disorder, Major psychology, Patient Reported Outcome Measures, Surveys and Questionnaires
- Abstract
Objective: To link scores on commonly used measures of anxiety (7-item Generalized Anxiety Disorder Scale; GAD-7) and depression (9-item Patient Health Questionnaire; PHQ-9) to the Traumatic Brain Injury Quality of Life (TBI-QOL) measurement system., Setting: 5 Traumatic Brain Injury Model Systems., Participants: A total of 385 individuals with traumatic brain injury (TBI) (31% complicated mild; 14% moderate; and 54% severe)., Design: Observational cohort., Main Measures: GAD-7, PHQ-9, TBI-QOL Anxiety v1.0 and TBI-QOL Depression v1.0., Results: Item response theory-based linking methods were used to create crosswalk tables that convert scores on the GAD-7 to the TBI-QOL Anxiety metric and scores on the PHQ-9 to the TBI-QOL Depression metric. Comparisons between actual and crosswalked scores suggest that the linkages were successful and are appropriate for group-level analysis. Linking functions closely mirror crosswalks between the GAD-7/PHQ-9 and the Patient-Reported Outcomes Measurement Information System (PROMIS), suggesting that general population linkages are similar to those from a TBI sample., Conclusion: Researchers and clinicians can use the crosswalk tables to transform scores on the GAD-7 and the PHQ-9 to the TBI-QOL metric for group-level analyses.
- Published
- 2019
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