Patients only participated in financial navigation program.

Patients and their caregivers participated as a dyad in financial navigation program.

The CC Links intervention is built on a platform of interdisciplinary team-based science, which ensured that the financial navigator worked closely with other members of the healthcare team including oncologists, nurses, transplant coordinators, social workers, and case managers, to help enhance financial hardship screening and connect survivors and caregivers with financial assistance services.

"Coping behaviors" was measured using a series of 9 yes/no items that first assess whether any recommended cancer care was skipped for any reason (yes/no), and then whether the reason for not receiving the care that they or their doctor believed necessary was due to any of 8 listed reasons (yes/no for each). Typical reasons included 'Couldn't afford care,' 'Insurance company wouldn't approve or pay for care,' and 'Had problems getting to the doctor's office.' The sum of the number of yes responses is the total score, with higher scores indicating greater coping behaviors in response to financial hardship. The items in this scale are from the Medical Expenditure Panel Survey - Experiences with Cancer Survivorship Survey (MEPS-ECSS).

"Material conditions" was measured using 8 items (6 from the Medical Expenditure Panel Survey: Experiences with Cancer Survivorship Supplement (MEPS-ECSS) and 2 from demographic survey) that measure the financial condition of the participant with cancer and their family. Six of the items are yes/no and these include questions on borrowing money or go into debt, filing for bankruptcy, and concerns about having to pay large medical bills because of the cost of cancer treatment. The remaining two items are ordinal and measure the amount of debt related to cancer costs (options range from $0 to $100,00+), and the how they perceive their household's income currently (choices range from 'living comfortably on present income' to 'finding it very difficult on present income'). The latter two items are rescaled to 0-1 variables, so they have the same ranges as the yes/no items and are summed to create the total score. Higher scores indicate greater financial hardship.

Psychological response (i.e. financial toxicity) was measured using the 11-item Comprehensive Score for Financial Toxicity (COST) that measures emotional aspects of financial hardship (financial toxicity) among cancer patients. Each item is scored on a 5-point ordinal scale ranging from 0='Not at all' to 4='Very much.' Sample items include 'My out-of-pocket expense are more than I thought they would be' and 'I am frustrated that I cannot work or contribute as much as I usually do.' Lower values indicate greater financial toxicity.

Amount of money saved per patient including grants and financial assistance received, total charges, financial assistance adjustments, insurance payments, and insurance charges.