Metastatic breast cancer in older patients: A longitudinal assessment of geriatric outcomes.

Introduction: Approximately 20% of older patients with breast cancer either present with metastatic disease or develop distant metastases after early breast cancer. The aims of this study were to assess the prevalence of psychosocial problems in older patients with metastatic breast cancer, and to assess longitudinal changes in functional status, psychosocial functioning, and quality of life.

Methods: For this prospective cohort study, patients with metastatic breast cancer aged 70 years and older were recruited in four Dutch hospitals. A baseline geriatric assessment was performed evaluating somatic, functional and psychosocial domains. Self-administered questionnaires were performed at baseline, three and six months: the Groningen Activity Restriction Scale, Geriatric Depression Scale, Loneliness scale, Apathy scale, Distress Thermometer and EORTC-QLQ-C30. Longitudinal changes on these scales were assessed by performing crude and adjusted linear mixed models.

Results: Of the 100 patients that were included and underwent a geriatric assessment, 85 patients completed the baseline self-administered questionnaires. Almost half of the patients (46%) had depressive symptoms, and up to 64% experienced distress. Apathy was present in 53%, and 36% experienced loneliness. Three- and six-month questionnaires were completed by 77 and 72 patients, respectively. Although a significant increase in loneliness between baseline and six months was seen, this size of this change was not clinically relevant. No other longitudinal changes were found.

Conclusion: The prevalence of distress, depressive symptoms, apathy and loneliness in older patients with metastatic breast cancer is high. Timely detection, for which a geriatric assessment is effective, could potentially improve quality of life.