• Sarah T Hawley, Kent A Griffith, Ann S Hamilton, Kevin C Ward, Monica Morrow, Nancy K Janz, Steven J Katz, and Reshma Jagsi.
• Department of Internal Medicine, Division of General Medicine, University of Michigan, Ann Arbor, Michigan.
• Cancer. 2017 Dec 1; 123 (23): 4547-4555.

BackgroundLittle is known about how the individual decision styles and values of breast cancer patients at the time of treatment decision making are associated with the consideration of different treatment options and specifically with the consideration of contralateral prophylactic mastectomy (CPM).MethodsNewly diagnosed patients with early-stage breast cancer who were treated in 2013-2014 were identified through the Surveillance, Epidemiology, and End Results registries of Los Angeles and Georgia and were surveyed approximately 7 months after surgery (n = 2578; response rate, 71%). The primary outcome was the consideration of CPM (strong vs less strong). The association between patients' values and decision styles and strong consideration was assessed with multivariate logistic regression.ResultsApproximately one-quarter of women (25%) reported strong/very strong consideration of CPM, and another 29% considered it moderately/weakly. Decision styles, including a rational-intuitive approach to decision making, varied. The factors most valued by women at the time of treatment decision making were as follows: avoiding worry about recurrence (82%) and reducing the need for more surgery (73%). In a multivariate analysis, patients who preferred to make their own decisions, those who valued avoiding worry about recurrence, and those who valued avoiding radiation significantly more often strongly considered CPM (P < .05), whereas those who reported being more logical and those who valued keeping their breast did so less often.ConclusionsMany patients considered CPM, and the consideration was associated with both decision styles and values. The variability in decision styles and values observed in this study suggests that formally evaluating these characteristics at or before the initial treatment encounter could provide an opportunity for improving patient clinician discussions. Cancer 2017;123:4547-4555. © 2017 American Cancer Society.© 2017 American Cancer Society.

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