Symptomatic adverse events of chemotherapy in breast cancer patients:Using CTCAE, PRO-CTCAE, and EORTC QLQ-C30.

Background: The Common Terminology Criteria for Adverse Events (CTCAE) is used as a tool to evaluate the adverse events (AE) of chemotherapy in cancer patients. Since CTCAE by medical providers underestimates AE more than patient-reported outcomes (PRO), the National Cancer Institute developed PRO-CTCAE. The present study investigated differences between symptoms detected using CTCAE by medical providers and PRO-CTCAE by breast cancer patients.

Methods: Patients received chemotherapy comprising epirubicin and cyclophosphamide pre- or postoperatively. AE were evaluated using 4 questionnaires:PRO-CTCAE, CTCAE, the European Organization for Research and Treatment of Cancer-Quality of Life Questionnaire (EORTC-QLQ-30), and Hospital Anxiety and Depression Scale (HADS) after 1, 2, and 3 courses of chemotherapy.

Results: Forty-two patients were registered. Regarding the recognition of psychological symptoms, such as fatigue, anxiety, and discouragement, and subjective symptoms, including heart palpitations and shortness of breath, PRO using PRO-CTCAE was significantly higher than medical provider-recognized outcomes using CTCAE. Concerning the recognition of regimen-specific symptoms, such as vomiting, nausea, and decreased appetite, medical provider- recognized outcomes were the same or higher than PRO. In QLQ-C30, the physical and role functions, fatigue and dyspnea significantly worsened after 2 and 3 courses of chemotherapy. J. Med. Invest. 71 : 82-91, February, 2024.