Treatment decision conversations, symptoms, and functional status in older adults with advanced cancer: An exploratory study utilizing mixed methods

Adults 65 years of age or older with metastatic cancer face complicated treatment decisions. Few studies have explored the process with oncology clinicians during clinic encounters. Our exploratory study evaluated whether symptom burden or functional status impacted treatment decision conversations between older adults, caregivers, and oncology clinicians in a single National Cancer Institute within the Mountain West region.We conducted an observational, convergent mixed methods longitudinal study between November 2019 and January 2021; participants were followed for six months. The MD Anderson Symptom Inventory (MDASI) and Katz Index of Independence in Activities of Daily Living (ADL) were administered prior to clinical encounter. Ambulatory clinic encounters were audio recorded, transcribed, and analyzed. Nineteen older adults with a metastatic cancer diagnosis or a relapsed refractory hematologic malignancy were approached to achieve a sample of fifteen participants. The main outcome of interest was the number and quality of treatment decision making conversations, defined broadly and encompassing any interaction between the participant and oncology provider that involved (a) an issue or concern (e.g., symptoms, quality of life) brought up by anyone in the room during the clinical encounter, (b) a clinician addressing the concern, or (c) the patient or caregiver making a decision that involved a discussion of their goals or treatment preferences.Nine men and six women with a mean age of 71.3 years (6.6; standard deviation [SD]) were enrolled, and four died while on study. Participants were followed from one to ten visits (mean 4.5; SD 2.8) over one to six months. Of the 67 analyzed encounters, seven encounter conversations (10%) were identified as involving any type of treatment decision discussion. The seven treatment decision conversations occurred with five participants, all male (although female participants made up 40% of the sample), and 63% of participants who reported severe symptoms on the MDASI were female. Severe symptoms or functional status did not impact treatment conversations.Our results suggest that older adults with incurable cancer and their oncology clinicians do not spontaneously engage in an assessment of costs and benefits to the patient, even in the setting of palliative treatment and significant symptom burden.