Abstract
Health-care-related transportation insecurity is common in the United States. Patients with cancer are especially vulnerable because cancer care is episodic in nature, occurs over a prolonged period, is marked by frequent clinical encounters, requires intense treatments, and results in substantial financial hardship. As a result of transportation insecurity, patients with cancer may forego, miss, delay, alter, and/or prematurely terminate necessary care. Limited data suggest that these alterations in care have the potential to increase the rates of cancer recurrence and mortality and exacerbate disparities in cancer incidence, severity, and outcomes. Transportation insecurity also negatively impacts at the informal caregiver, provider, health system, and societal levels. Recognizing that transportation is a critical determinant of outcomes for patients with cancer, there are ongoing efforts to develop evidence-based protocols to identify at-risk patients and address transportation insecurity at federal policy, health system, not-for-profit, and industry levels. In 2021, the National Cancer Policy Forum of the National Academies of Science, Engineering, and Medicine sponsored a series of webinars addressing key social determinants of health including food, housing, and transportation among patients with cancer. This commentary summarizes the formal presentations and discussions related to transportation insecurity and will 1) discuss the heterogeneous nature of transportation insecurity among patients with cancer; 2) characterize its prevalence along the cancer continuum; 3) examine its multilevel consequences; 4) discuss measurement and screening tools; 5) highlight ongoing efforts to address transportation insecurity; 6) suggest policy levers; and 7) outline a research agenda to address critical knowledge gaps.