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- BEDARD Michael, et al
- Journal article citation:
- Gerontologist, 41(5), October 2001, pp.652-657.
- Gerontological Society of America
The purpose of the study was to develop a short and a screening version of the Zarit Burden Interview (ZBI) that would be suitable across diagnostic groups of cognitively impaired older adults, and that could be used for cross-sectional,longitudinal, and intervention studies. The authors used data from 413 care givers of cognitively impaired older adults referred to a memory clinic and collected information on caregiver burden with the 22-item ZBI, and information about dependence in activities of daily living (ADLs) and the frequency of problem behaviours among care recipients. We used factor analysis and item-total correlations to reduce the number of items while taking into consideration diagnosis and change scores. From this they produced a 12-item version (short) and a 4-item version (screening) of the ZBI. Correlations between the short and the full version ranged from 0.92 to 0.97, and from 0.83 to 0.93 for the screening version. Correlation between the three versions and ADL and problem behaviours were similar. We further investigated the behaviour of the short version with a two-way analysis of variance and found that it produced identical results to the full version. The short and screening versions of the ZBI produced results comparable to those of the full version. Reducing the number of item did not affect the properties of the ZBI, and it may lead to easier administration of the instrument.