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Adherence and Patients' Attitudes to Oral Anticancer Drugs: A Prospective Series of 201 Patients Focusing on Targeted Therapies
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International audience. Objectives: Patient adherence is a challenge in oncology and hematology practice. Hormone therapy data in breast cancer suggest insufficient adherence and poor persistence. Limited data are available for targeted therapies (TT) including tyrosine kinase and mammalian target of rapamycin inhibitors. Methods: We performed a prospective survey using a 15-item questionnaire in patients with solid tumors and hematologic malignancies receiving oral anticancer therapy. Treatment duration, setting (adjuvant vs. metastatic), cancer type, age, and comedication were recorded. Results: 201 patients (median age 65.5 years) participated, 102 with TT and 99 with hormone therapy or chemotherapy (HC). The median time of drug intake was 11.0 months. Written information was more frequently given to TT patients (68.6 vs. 23.2%, p < 0.0001). TT and HC patients showed equal adherence to therapy (72.5 vs. 69.6%, p = n.s.) despite TT patients experiencing more side effects (p < 0.0001) and taking more concomitant oral medication (p = 0.0042). Forgotten doses were the leading cause of nonadherence in HC patients (83%, as compared to 54% in the TT group), whereas dose reduction by the patient was higher in the TT group (32 vs. 17%). Conclusions: Despite advances in providing information to patients leading to better adherence among TT patients, efforts towards better patient education are warranted including dedicated staff for monitoring outpatient anticancer oral therapy.
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