Factor Structure of the Burden Interview

Zarit's Burden Interview is the most commonly used measure of burden among family caregivers for demented older adults, but has been criticized for its diverse item content and lack of correspondence to theoretically based multidimensional burden scales. The factor structure of this measure of burden was examined in a sample of 220 family caregivers of demented elderly. The implied 1-factor model and a 2-factor model proposed in the literature were not good fits to the data. Fourteen of the 21 nonglobal items were found to tap three underlying factors of Embarrassment/Anger, Patient's Dependency, and Self-criticism. This factor structure was replicated in a second sample of 108 caregivers. The relationship of these factors to latent factors identified in other multifactorial burden scales suggests a greater degree of convergence across measures than has been assumed.