• Ching-Tzu Yang, Hsin-Yun Liu, and Yea-Ing Lotus Shyu.
• Graduate Institute of Clinical Medical Sciences, Chang Gung University, Taoyuan, Taiwan.
• Int J Nurs Stud. 2014 Apr 1;51(4):593-602.

BackgroundFamily caregivers of older persons with dementia face negative impacts such as heightened role strain due to care receivers' incremental loss of cognitive function. Dyadic relational resources were found to protect caregivers against negative caregiving outcomes while caring for cancer patients, but had not been explored in caregivers of patients with dementia.ObjectiveTo explore whether the impact of caregiving demand/care receivers' cognitive functioning on caregiver role strain is moderated by dyadic relational resources.DesignCross-sectional correlational survey.SettingThe neurological clinics of a 3700-bed medical centre, neurological ward, and day care centre affiliated with a regional hospital in northern Taiwan.ParticipantsA convenience sample of 219 family caregivers and care receivers with dementia was enrolled, with 197 (90%) completing the study questionnaires.MethodData were collected from family caregivers' self-completed questionnaires from December 2010 to November 2011. We examined the moderating effects of caregiving demand/care receiver dementia severity and dyadic relational resources (mutuality, preparedness and predictability) on caregiving outcome (role strain) using hierarchical multiple regression analyses. Moderating effects were examined according to two- and three-way interaction terms in the regressions. We also explored the simple effect of each independent variable on role strain.ResultsThe dyadic relational resources of mutuality and preparedness moderated the effects of caregiving demand on caregivers' role strain. That is, a high level of mutuality and preparedness protected caregivers from high levels of role strain, even when caregiving demand was high. Another important factor was a high level of predictability, which tended to decrease role strain. Finally, the association between care receiver cognitive functioning and caregiver role strain was influenced by the level of mutuality between caregiver and care receiver. More specifically, high levels of mutuality diminished role strain in caregivers of patients with mild dementia.ConclusionsDyadic relational resources may moderate the effects of role strain. These findings suggest that these dyadic relational resources should be enhanced for family caregivers of patients with dementia to ease their caregiving role strain.Copyright © 2013 Elsevier Ltd. All rights reserved.

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