Effects of guideline adherence in primary breast cancer--a 5-year multi-center cohort study of 3976 patients

The Breast : Official Journal of the European Society of Mastology
A WöckelDominic Varga

Abstract

The aim of that study was to analyze the impact of German-S3-breast cancer guideline adherence on clinical outcomes. A retrospective study analyzed 3976 patients first diagnosed with primary breast cancer according to an S3-guideline-based model that classified patients retrospectively into groups receiving "guideline-adherent and "guideline non-adherent" therapy. There was a significant association between treatment adherence and prolonged recurrence free and overall survival (p = 0.0001). The greater the number of violations in guideline adherence, the lower was overall survival (p = 0.0001). Advanced age at initial diagnosis was additionally associated with a reduction in guideline adherence. The percentage of guideline adherence for the therapeutic modalities BCT, mastectomy, axillary dissection and hormone therapy was greater than 80%. For chemotherapy, the percent of guideline adherence totaled 71.4%. Therapies dispensed in adherence with guidelines may improve recurrence-free survival and overall survival in patients with breast cancer.

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