1. A Composite Measure of Caregiver Burden in Dementia: The Dementia Burden Scale-Caregiver
- Author
-
John D, Peipert, Lee A, Jennings, Ron D, Hays, Neil S, Wenger, Emmett, Keeler, and David B, Reuben
- Subjects
Adult ,Aged, 80 and over ,Male ,Psychiatric Status Rating Scales ,Psychometrics ,Reproducibility of Results ,Middle Aged ,Article ,Caregivers ,Cost of Illness ,Surveys and Questionnaires ,Humans ,Dementia ,Female ,Prospective Studies ,Factor Analysis, Statistical ,Aged ,Follow-Up Studies - Abstract
BACKGROUND/OBJECTIVES: Caregiving for persons with dementia (PWD) results in a variety of psychological symptoms ranging from strain to depression. To better capture the scope of caregiver burden, we created a composite from 3 existing measures that assess different domains. DESIGN: Prospective follow-up study. SETTING: University-based dementia care management program PARTICIPANTS: 1091 caregivers of PWD. MEASUREMENTS: The Dementia Burden Scale - Caregiver (DBS-CG) composite measure was based on the Modified Caregiver Strain Index, Neuropsychiatric Inventory Questionnaire Distress Scale, and Patient Health Questionnaire (PHQ-9). ANALYSIS: Alternative measure structures were evaluated with two confirmatory factor analysis (CFA) models: 1) bifactor model and 2) a correlated 3 factor model. Good model fit was defined as a root mean squared error of approximation (RMSEA) value of < 0.06 and comparative fit index (CFI) value of >0.95. ω was calculated as an estimate of the scale reliability. Minimally important differences (MIDs) were estimated by anchoring the magnitude of DBS-CG change to change in caregiver self-efficacy and functional ability of PWD. RESULTS: The bifactor CFA model fit best, with RMSEA = 0.04 and CFI = 0.95. Based on this model, a DBS-CG scale was created wherein all items were transformed to a 0–100 possible range and then averaged. Higher scores indicate higher burden. The mean DBS-CG score was 27.3. The ω reliability was 0.93, indicating excellent reliability. MID estimates ranged from 4–5 points (effect sizes: 0.20 ≤ d < 0.50). CONCLUSIONS: This study provides support for the reliability and validity of the DBS-CG. It can be used as an outcome measure to assess the effect of interventions to reduce dementia caregiver burden.
- Published
- 2018