This work is based on the core scientific premise - that increasing patient active participation and the frequency and quality of treatment cost discussions will decrease the short- and longer-term burdens of financial toxicity through their influence on self-efficacy for managing treatment cost. The focus is on patient self-efficacy for managing treatment cost because it is expected that improved treatment cost education and patient-oncologist treatment cost discussions prompted by the DISCO App will directly improve the self-efficacy needed for patients to proactively manage treatment costs, thus reducing the material and psychological burden of financial toxicity. The DISCO App is not designed to increase patients' ability to pay or reduce the cost of treatment, but it may benefit patients by increasing: their knowledge of treatment costs, their self-efficacy for managing cost, and the likelihood they receive financial and psychological assistance and support. This research is significant because, if successful, reducing the material and psychological burden of financial toxicity will improve the quality of care and work toward achieving health equity. The DISCO App has already been tested for its feasibility and acceptability. The DISCO App will now be tested for its effectiveness in a diverse population of people with solid tumors treated with IV and oral chemotherapies.
