Patient-Reported Outcome Measurement and Reporting for Patients with Soft Tissue Tumors: A Scoping Literature Review

(1) Background: Quality of life (QoL) assessment is a crucial aspect for patients diagnosed with cancer. Over the years, different tools have been developed to measure QoL, both generic and pathology specific, but the inclusion of quality of life among other indicators of efficacy in randomized controlled trials (RCTs) remains a controversial issue. In this review, we aim to review the frequency and modality of QoL assessment in RCTs, enrolling patients diagnosed with mesenchymal tumors. (2) Methods: An electronic literature search of bone and soft tissue sarcoma and GIST-related RCTs published between January 2000 and December 2023 was performed by two independent reviewers using PubMed. English-language phase II and III clinical trials enrolling at least more than 15 patients were included, regardless of the disease stage. Studies involving patients under the age of 18 years or for which the full text was not available were excluded. For each study, data regarding the journal and year of publication, the study design, the primary objective, and the evaluation of quality of life as an endpoint with any type of patient-reported outcomes used were extracted. (3) Results: Among the 742 publications screened, 171 resulted eligible. QoL assessment was listed among the endpoints in 35 trials and QoL results were reported in 29 primary publications. In these trials, 16 included patients with soft tissue sarcomas, 8 Kaposi sarcomas, 6 GIST, and 3 desmoid tumors. Among all the trials included, 10.4% on an adjuvant/neoadjuvant setting and 24.4% on a metastatic setting included QoL as an endpoint. The proportion of trials, including QoL, was variable over time, as follows: 16.9% of trials in 2000-2014 vs. 23.4% in 2015-2023. In 35 trials, including QoL endpoints, 27 had a superiority design and 25 reported a positive result. In the majority of trials (80%), the tools for QoL assessment were generic and those mostly used were the EORTC QLQ-C30, the EQ-5D questionnaire, and the modified Brief Pain Inventory-Short Form. (4) Conclusions: Quality of life has not been assessed or published in many phase II and III trials, despite an improvement over time. QoL evaluation in RCTs should be considered even more carefully in patients with rare tumors, where the low number of patients who can be enrolled makes it difficult to draw statistically significant conclusions on the effectiveness of treatments.