Impact of Preexisting Mental Illness on All-Cause and Breast Cancer–Specific Mortality in Elderly Patients With Breast Cancer

Purpose Limited data are available on the survival of patients with breast cancer with preexisting mental illness, and elderly women are of special interest because they experience the highest incidence of breast cancer. Therefore, we compared all-cause and breast cancer–specific mortality for elderly patients with breast cancer with and without mental illness. Methods A retrospective cohort study was conducted by using SEER-Medicare data,...