Patient-reported outcome measure (PROM) programs for monitoring symptoms among patients treated with immunotherapy: a scoping review

Background: Monitoring toxicities among patients receiving immune checkpoint inhibitors using patient-reported outcome measures (PROMs) is relatively recent. This scoping review aims to guide decision making in the development of PROMs programs for patients receiving immune checkpoint inhibitor therapy.

Methods: Four electronic databases were searched from inception to January 2024. Data on PROM programs for patients receiving immune checkpoint inhibitors (eg, PROMs used, frequency) were extracted. Two authors with established interrater reliability screened titles, abstracts, and full texts. A narrative synthesis identified patterns in the data.

Results: A total of 22 articles described 16 unique multicomponent, electronic PROM programs for patients receiving immune checkpoint inhibitor therapy, mainly developed for remote monitoring of toxicities between appointments. Patients typically completed 18-26 items from the Patient-Reported Outcomes Common Terminology Criteria for Adverse Events (PRO-CTCAE) or Common Terminology Criteria for Adverse Events (CTCAE) weekly, with high adherence and satisfaction. Commonly monitored symptoms were diarrhea, fatigue, shortness of breath, cough, nausea, decreased appetite, rash, joint pain, pain, and mood. Other features of PROMs programs included clinician alerts, with some programs only flagging symptoms that had an impact on treatment. Some programs also or only sent alerts to patients to contact their clinicians and gave access to symptom management information. In terms of efficacy, the only consistent finding was an increase in quality of life.

Conclusions: The findings of this scoping review provide some indication as to which components of a PROM program are promising. However, as the evidence base for using PROMs among patients receiving immune checkpoint inhibitors is growing, many questions remain, including which symptoms to monitor, using which PROM, and at what frequency. More trials are needed to answer these questions and to determine how best to implement PROMs among patients receiving immune checkpoint inhibitor in clinical practice.