A Prospective Study of Non‑Treating Medical Institution Use for Supportive Care During Adjuvant Chemotherapy After Curative Surgery (PRO-SUCCESS).

Purpose Patients undergoing adjuvant chemotherapy often utilize non‑treating medical institutions (NTMIs) for supportive care. We investigated utilization patterns and associated clinical factors.

Materials and Methods In this prospective observational study, patients with solid tumors receiving adjuvant chemotherapy after curative resection were surveyed using SCNS-SF34, FACT-G, MDASI-K, and HADS at multiple timepoints. Associations between facility usage and survey scores were analyzed.

Results Forty-four percent of participants used non-treating medical institutions during adjuvant chemotherapy. Patients with breast cancer and those with an ECOG performance status of 0 were more likely to use NTMIs. Higher SCNS-SF34 scores in the Physical & Daily Living domain were significantly associated with the number of NTMI use days. FACT-G, MDASI, and HADS-anxiety scores also showed associations, while dose intensity and emergency room visits did not.

Conclusion Patients receiving adjuvant chemotherapy frequently use NTMIs for unmet physical or emotional needs. Systematic approaches to symptom control and patient education within oncology settings may reduce unnecessary healthcare utilization.