Journal of Clinical Oncology, Vol 16, 515-521, Copyright © 1998 by American Society of Clinical Oncology
Survey of breast cancer patients concerning their knowledge and expectations of adjuvant therapy
PM Ravdin, IA Siminoff and JA Harvey
University of Texas Health Science Center, San Antonio 78284-7884, USA. ravdin@uthscsa.edu
PURPOSE: A survey of breast cancer survivors in the United States was
conducted to define what they had been told about their prognosis and the
value of adjuvant therapy, what they estimated their prognosis to be with
and without adjuvant therapy, and what level of improvement they would have
found minimally worthwhile. MATERIALS AND METHODS: Survey questionnaires
were mailed to individual members and member organizations of the National
Alliance of Breast Cancer Organizations (NABCO). Questionnaires were
returned anonymously in prepaid mailers. Five hundred sixty-two women
responded. Of these, the 318 women who received adjuvant chemotherapy were
included in this analysis. RESULTS: Only 39% of the women recalled
receiving quantitative estimates of their prognosis, and only 31% of women
received a quantitative estimate both with and without adjuvant therapy.
Sixty-eight percent of the women were able to provide a quantitative
estimate for their outcome at 5 years both with and without adjuvant
therapy. From these estimates, we calculated that the median estimated
proportional risk reduction for recurrence that women thought they had
achieved was 79%. Women were asked what degree of absolute benefit they
would have found acceptable. The median acceptable extension of life
expectancy was 3 to 6 months, and acceptable reduction in recurrence risk
was 0.5% to 1.0%. However, there was considerable variation, with 27% of
women not accepting less than 1 year and 26% not accepting a less than 5%
reduction in recurrence risk. CONCLUSION: In general, American women in the
surveyed population (1) do not recall being provided quantitative estimates
of outcome during the process of making decisions about adjuvant therapy,
(2) overestimate the value of their therapy, and (3) often will accept
remarkably low degrees of net benefit. Overall, these observations can be
used to support the argument that improvements in doctor/patient
communication may be important to truly informed decision-making, and that
flexibility for individual patients' preferences should not be superseded
by rigid treatment guidelines.
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