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Newswise — Background: Routine electronic assessment of patient-reported outcomes (ePROs) can improve cancer care; yet, its implementation in routine practice and long-term sustainability remain unclear. Understanding these aspects is critical to advancing the field.

Objective: To review and describe the past and current status, time trends, and long-term sustainability of clinical ePRO applications in routine oncology care.

Methods: We conducted a systematic review of publications on ePRO use in oncology care up to December 31, 2023, searching PubMed and Web of Science and extracting data on clinical ePRO applications. We included peer-reviewed studies including patients with cancer using ePRO assessments in clinical practice, excluding research letters and conference abstracts. Data from the review were analyzed using descriptive statistics and univariate regression models to evaluate time trends, with year of publication as the predictor. A follow-up survey was sent to authors of published ePRO applications to assess their current use of the application or reasons for discontinuation. Responses from the follow-up survey were analyzed descriptively.

Results: For the review, we screened 2933 references, and 303 met inclusion criteria. Results showed that Europe was the most common region (n=141, 46.5%), and study populations consisted mostly of adult patients (n=276, 91.1%) under chemotherapy treatment (n=124, 40.9%) assessed in an outpatient setting (n=261, 86.1%). The EORTC (European Organisation for Research and Treatment of Cancer; n=77, 25.4%) and PRO-CTCAE (Patient-Reported Outcomes Version of the Common Terminology Criteria for Adverse Events) questionnaires (n=65, 21.5%) were most frequently integrated into ePRO applications. In the univariate analysis, we found that publications increased significantly over time (2003-2023, P<.001). Trends showed a rise in mobile app use (odds ratio [OR] 1.211, P<.001), remote assessments (OR 1.094, P=.002), and feedback provided to patients (OR 1.060, P=.04). Of the 303 studies, 221 unique clinical ePRO applications were identified, merging publications at the application level. The follow-up survey had a 35.3% response rate (78/221), with 61.1% of ePRO applications still in use, lasting a median of 5 years. The most common reason for discontinuation was a lack of funding and resources (42.9%, 12/28).

Conclusions: The field of ePRO assessment in oncology is rapidly evolving, with a shift toward remote, app-based tools and a growing emphasis on providing feedback to patients. We present, for the first time, data on the sustainability of ePRO use in routine care. While our findings offer valuable insights, they should be interpreted in light of potential response bias in the follow-up survey. Several ePRO applications remain in active use, highlighting potential for long-term integration into clinical practice. However, financial constraints, limited reimbursement models, and challenges with workflow integration continue to hinder broader and more sustainable adoption. Addressing these barriers will be essential to support the continued use of ePROs in clinical care.