• Susan Mockus Parks, Laraine Winter, Abbie J Santana, Barbara Parker, James J Diamond, Molly Rose, and Ronald E Myers.
• Department of Family and Community Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania, USA. susan.parks@jefferson.edu
• J Palliat Med. 2011 Feb 1; 14 (2): 179184179-84.

BackgroundFew studies have examined proxy decision-making regarding end-of-life treatment decisions. Proxy accuracy is defined as whether proxy treatment choices are consistent with the expressed wishes of their index elder. The purpose of this study was to examine proxy accuracy in relation to two family factors that may influence proxy accuracy: perceived family conflict and type of elder-proxy relationship.MethodsTelephone interviews with 202 community-dwelling elders and their proxy decision makers were conducted including the Life-Support Preferences Questionnaire (LSPQ), and a measure of family conflict, and sociodemographic characteristics, including type of relationship.ResultsElder-proxy accuracy was associated with the type of elder-proxy relationship. Adult children demonstrated the lowest elder-proxy accuracy and spousal proxies the highest elder-proxy accuracy. Elder-proxy accuracy was associated with family conflict. Proxies reporting higher family conflict had lower elder-proxy accuracy. No interaction between family conflict and relationship type was revealed.ConclusionsSpousal proxies were more accurate in their substituted judgment than adult children, and proxies who perceive higher degree of family conflict tended to be less accurate than those with lower family conflict. Health care providers should be aware of these family factors when discussing advance care planning.

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