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Eva-Maria Fick,Alexander Katalinic,Annika Waldmann 대한암학회 2015 Cancer Research and Treatment Vol.47 No.4
Purpose The aim of this cross-sectional health care study (use of bisphosphonates in primary tumorsof the mammae, EBisMa) is to determine how often bisphosphonate medication is used inpatients with non-metastatic primary breast cancer treatment, but who do not suffer fromosteoporosis. Furthermore, we describe patients’ characteristics and the most frequentlyused type of bisphosphonate in adjuvant therapy. Materials and MethodsThe study population included primary breast cancer patients of four breast centers in northernGermany. Data on bisphosphonate therapy were collected by use of patient questionnaires;clinical data were extracted from the registers. Patients with and without prescribedbisphosphonate adjuvant treatment were tested for statistically significant differencesregarding their characteristics. ResultsFour hundred seventy-four of 663 contacted patients participated in the study. Thirty-nineout of 474 patients (9.6%) were on adjuvant bisphosphonate therapy. Zoledronic acid wasthe most frequently reported bisphosphonate used for prevention of bone metastases. Comparedto patients who did not report bisphosphonate medication, women who did reportbisphosphonate therapy had a significantly higher advanced tumor stage (p < 0.001). Boththe T2-T4 stage and N+ stage remained significant predictors in multivariate-adjustedregression models. ConclusionBisphosphonates are rarely used in the adjuvant treatment of primary breast cancer. Patients with advanced tumor stage were more likely to use bisphosphonates in the adjuvanttreatment of primary breast cancer. Further research is needed to identify patientswho may benefit most from adjuvant bisphosphonate treatment.