During the coronavirus disease 2019 (COVID-19) outbreak in China, fear about COVID-19, together with worry about progression of cancer, caused strong emotional stress in patients with cancer. We evaluated patientreported outcome in 658 patients with breast cancer (BC) and survivors recruited from multiple BC centers in Hubei Province using 4 standardized assessment scales. Multivariable logistic regression analysis was used to identify potential affecting factors on mental health outcomes. High rates of anxiety, depression, distress, and insomnia were observed in patients with BC during the COVID-19 outbreak. Based on our results, living in Wuhan, poor general condition by self-identification, shorter duration after BC diagnosis, aggressive BC molecular subtypes, metastatic BC clinical stage, treatment discontinuation, central venous catheter flushing delay, or close contact with patients with COVID-19 are associated risk factors for poorer psychological status. Special attention should be paid to the psychological status of patients with BC, especially those with poor general condition, treatment discontinuation, aggressive molecular subtypes, and metastatic BC. Introduction: We aimed to analyze the psychological status in patients with breast cancer (BC) in the epicenter of the coronavirus disease 2019 (COVID-19) pandemic. Patients and Methods: A total of 658 individuals were recruited from multiple BC centers in Hubei Province. Online questionnaires were conducted, and these included demographic information, clinical features, and 4 patient-reported outcome scales (Generalized Anxiety Disorder Questionnaire [GAD-7], Patient Health Questionnaire [PHQ-9], Insomnia Severity Index [ISI], and Impact of Events Scale-Revised [IES-R]). Multivariable logistic regression analysis was designed to identify potential factors on mental health outcomes. Results: Questionnaires were collected from February 16, 2020 to February 19, 2020, the peak time point of the COVID-19 outbreak in China. Of patients with BC, 46.2% had to modify planned necessary anti-cancer treatment during the outbreak. Severe anxiety and severe depression were reported by 8.9% and 9.3% of patients, respectively. Severe distress and insomnia were reported by 20.8% and 4.0% of patients, respectively. Multivariable logistic regression analysis demonstrated poor general condition, shorter duration after BC diagnosis, aggressive BC molecular subtypes, and close contact with patients with COVID-19 as independent factors associated with anxiety. Poor general condition and central venous catheter flushing delay were factors that were independently associated with depression. In terms of insomnia, poor generation condition was the only associated independent factor. Poor physical condition and treatment discontinuation were underlying risk factors for distress based on multivariable analysis. Conclusion: High rates of anxiety, depression, distress, and insomnia were observed in patients with BC during the COVID-19 outbreak. Special attention should be paid to the psychological status of patients with BC, especially those with poor general condition, treatment discontinuation, aggressive molecular subtypes, and metastatic BC. (C) 2020 The Author(s). Published by Elsevier Inc.