Research Of Quality Of Life And Safety Outcomes Of Postmenopausal Breast Cancer Patients Switching From Tamoxifen Therapy To Aromatase Inhibitor Therapy

Inclusion Criteria: Patients with endocrine responsive early stage postmenopausal breast cancer. Patients who received tamoxifen for 2-3 years as adjuvant endocrine therapy. Patients who were approved to switch to aromatase inhibitor treatment during the patient recruitment period. Patients who were informed about the study and accepted to participate. Exclusion Criteria: Patients having a psychological disorder which will prevent their understanding of questionnaires used for evaluation of quality of life and / or patients who are illiterate.