Cancer care has had lots of known side effects but one goes less discussed - the "financial toxicity", which is the expense, anxiety and loss of confidence confronting those who face large, unpredictable costs, often compounded by decreased ability to work.
Writing in Cancer, a team of University of Chicago cancer specialists describe the first tool to measure a patient's risk for, and ability to tolerate, financial stress. The researchers named their patient-reported outcome measure COST (COmprehensive Score for financial Toxicity) and uses
11 questions, assembled and refined from conversations with more than 150 patients with advanced cancer.
The timing is right. The cost of health care in the United States is rising faster than the gross domestic product. The cost of cancer care is rising faster than the cost of health care, and the cost of new cancer drugs is rising faster than the cost of overall cancer care.
Financial pain may extend beyond treatment. A recent study from the Centers for Disease Control and Prevention found that 30 percent of cancer survivors are not able to return to work, or have decreased ability to work. Annual medical expenditures increase by more than $4,000 for males who have had cancer and by nearly $3,300 for females.
"Few physicians discuss this increasingly significant side effect with their patients," said study author Jonas de Souza, MD, a head-and-neck cancer specialist at the University of Chicago Medicine. "Physicians aren't trained to do this. It makes them, as well as patients, feel uncomfortable," he said. "We aren't good at it. We believe that a thoughtful, concise tool that could help predict a patient's risk for financial toxicity might open the lines of communication. This gives us a way to launch that discussion.
"We need better ways to find out which patients are most at risk. Then we can help them get financial assistance. If patients know what to expect, they may want their physicians to consider less costly medications."
Development of the COST questionnaire began with a literature review and a series of extensive interviews. de Souza and colleagues spoke with 20 patients and six cancer professionals, as well as nurses and social workers. That produced a list of 147 questions. The researchers pared the list down to 58 questions. Then they asked 35 patients to help them decide which of the remaining questions were the most important. The patients narrowed the list down to 30.
"In the end, 155 patients led us, with some judicious editing, to a set of 11 statements," de Souza said. "This was sufficiently brief to prevent annoying those responding to the questions but thorough enough to get us the information we need."
All 11 entries are short and easy to understand. For example, item 2 states: My out-of-pocket medical expenses are more than I thought they would be. Item 7, more optimistic, states: I am able to meet my monthly expenses. For each question, patients choose from five potential responses: not at all, a little bit, somewhat, quite a bit, or very much.
Learning how a patient responds may help caregivers determine who is likely to need education, financial counseling, or referral to a support network. The quiz may also predict who is likely to have problems and will require interventions.
All patients who helped develop the study had been in treatment for at least two months and had received bills. Excluding the top 10 percent and the bottom 10 percent, patients in the study earned between $37,000 and $111,000. The median annual income for these patients was about $63,000.
The researchers expected that financial toxicity would correlate with income. "But in our small sample that did not hold up," de Souza said. "People with less education seemed to have more financial distress, but variations in income did not make much difference. We need bigger studies to confirm that, but at least we now have a tool we can use to study this."
The researchers are now conducting a larger study to validate these findings and correlate the newly developed scale with quality of life and anxiety in cancer patients.
"We need to assess outcomes that are important for patients," de Souza said. The cost burden cancer patients experience is definitely one. Measuring this toxicity is the first step towards addressing this important issue. "At the end," he added, "this is another important piece of information in the shared-decision-making process."