Health-Related Quality of Life and Associated Comorbidities in Community-Dwelling Women with Breast Cancer.

: With advancements in treatment, the increasing number of women with breast cancer has led to a growing focus on enhancing their well-being by understanding health-related quality of life (HRQoL). This study aimed to investigate the association between comorbidities and HRQoL in middle-aged and older community-dwelling Korean women with breast cancer. : Data from the Sixth, Seventh, and Eighth Korea National Health and Nutrition Examination Surveys between 2014 and 2020 were used to analyze 12,218 women aged ≥50 years (244 women with breast cancer vs. 11,974 women without breast cancer). HRQoL was assessed using the EQ-5D-3L tool and the EQ-5D index. Associations between comorbidities (arthritis, depression, hypertension, diabetes, and cardiovascular disease) and HRQoL were examined. : Among women with breast cancer, arthritis was associated with problems in mobility (OR, 3.24; 95% CI, 1.39-7.53) and pain/discomfort (OR, 7.30; 95% CI, 3.62-14.73). Depression was associated with problems in self-care (OR, 7.02; 95% CI, 1.97-25.01), usual activities (OR, 5.73; 95% CI, 1.52-21.59), pain/discomfort (OR, 5.58; 95% CI, 1.49-20.87), and anxiety/depression (OR, 3.81; 95% CI, 1.14-12.72). Arthritis and depression were also considerably associated with overall HRQoL, as measured by the EQ-5D index. Hypertension, diabetes, and cardiovascular disease were not independently associated with HRQoL. : Arthritis and depression were markedly associated with HRQoL in middle-aged and older women in the community who suffer from breast cancer. Public health interventions that focus on managing these comorbidities can enhance the well-being of women with breast cancer.