Table 1. . Definitions of financial burden, causes and moderators.

Term	Definitions
Material
Material financial burden	Material or tangible consequences of the costs of cancer and its treatments.
Healthcare-specific financial coping behaviors	Specific actions patients and their families take to afford care, such as starting a crowdfunding campaign or rationing medication. Referred to as material conditions, coping behaviors and objective by previous models.
General financial coping behaviors	Specific actions patients and their families take to afford basic needs that are harder to afford due to the costs of care. Examples include reducing spending on luxuries, working multiple jobs due to the high cost of living, or moving to a cheaper apartment. Referred to as material conditions, coping behaviors and objective by previous models.
Healthcare-specific financial consequences	Events that result from patients’ inability to cope with the causes of financial burden. Examples include being sued by a healthcare provider for unpaid bills, healthcare bills going to collections and liens being placed on property by healthcare organizations.
General financial consequences	Events in a patient’s general financial life that result from inability to pay for care. Examples include eviction, utilities being shut off and increased food insecurity.
Psychological
Psychological financial burden	Negative emotions and thoughts associated with one’s financial situation that result from causes or material financial burden. Referred to as psychological response, subjective and financial strain by previous models.
Worry about affording healthcare	Worry and anxiety about affording future healthcare services, medications and devices.
General financial anxiety	Worry and anxiety about one’s overall financial burden, including the cost of necessities like food and shelter.
Depression and rumination over material financial burden, healthcare-specific	Depressive symptoms and negative thinking about past or current material financial burden that resulted from the cancer and treatment.
Depression and rumination over material financial burden, general	Depressive symptoms and negative thinking about past or current material financial burden related to meeting basic needs.
Causes	Discrete events that lead to financial burden; can also be called financial shocks. Referred to as financial stress, material conditions and monetary measures by previous models.
Medical costs	Causes of financial burden that are costs directly resulting from medical care such as co-pays, co-insurance and costs of services not covered by insurance. Costs can be variable (co-pays) or less variable (premiums).
Indirect (nonmedical costs)	Causes of financial burden that are costs resulting from the cancer but not directly related to health services costs. Examples include transportation costs, food costs and paying for childcare.
Moderators	Factors that increase or decrease the likelihood of causes affecting financial burden. Can be at the individual, caregiver, organizational or policy level and can pre-date the cancer diagnosis. Examples include treatment location, bill collection practices and disability accommodation policies.