“Should I Prioritize My Cancer or My Diabetes?”: Patient-Perceived Barriers to Co-Managing Cancer and Diabetes Mellitus

Among patients with cancer, diabetes mellitus (DM) is a prevalent comorbid condition. With an aging population and an increase in the prevalence of cancer and DM, the number of cancer patients with DM will rise. To date, studies have largely focused on understanding the context of cancer and DM co-management from the perspectives of oncology and primary care providers. To better understand the potential barriers to optimal cancer and DM co-management, we conducted 17 semi-structured interviews with DM patients receiving cancer care at New York-Presbyterian Weill Cornell Medical Center outpatient oncology clinics in New York, NY. In total, 53% patients were female, 35% were non-White, and the mean age was 64.75 (SD 11.10) years. We qualitatively analyzed our data and identified the following nine themes: (1) patients develop DM during or after cancer treatment; (2) patients do not know about the possible interactions between DM and cancer treatment; (3) cancer care is prioritized over DM management; (4) severity of DM symptoms drive patients’ DM self-management during cancer care; (5) impact of cancer treatment on quality of life; (6) demands from cancer care make DM management more difficult; (7) patients want individualized treatment plans that integrate DM and cancer co-management; (8) need for greater patient activation; (9) lack of patient-centered educational resources on DM management during cancer care. Owing to these results, our findings highlight the need to increase patient engagement by developing and disseminating patient-centered educational resources on cancer and DM to improve self-management practices and patient outcomes.