Breast cancer guidelines--Physicians' intentions and behaviors.

Guidelines are written to define what a physician should do, and networks set up to provide every patient with good practice. However, is willingness to treat according norms enough to actually implement it? Between 1997 and 2003, 4,533 women with invasive, noninflammatory, nonmetastatic breast cancer have been treated within the framework of a regional network (R2C). The rate of implementation of 5 consensual norms was assessed. The rate of "abnormal" management regarding surgical re-excision for inadequate margin was found to be 12.6%. The main explanatory variable was patient age >70 years (OR = 4.05). For nodal exploration, the sampling quality threshold was set at 10. Mean rate of lack of compliance was 25.2%. The 2 main explicative factors were surgeon's experience and women's age. The observed rate of "insufficient" irradiation dose was 18.2%. The main explanatory variables were age (with a gradient) and a negative nodal status. Concerning adjuvant chemotherapy, the rate of no treatment (despite consensual indication) was 16.0%. Again, the main explicative factor was age (with a gradient). Women's age appears to be a major explanatory variable predicting lack of physician's compliance with consensual norms. Besides the age of the women, a "better" prognosis (negative nodal status and pT < or = 20 mn) is often associated with lack of compliance. It is not clear, however, if it's the rules that do not fit the clinical situation of aging patients or the physicians who are not aware of the benefit of consensual disease management for aging patients. Copyright 2006 Wiley-Liss, Inc.