BackgroundIn clinical oncology practice, patient-reported outcomes (PROs) are essential for assessing the symptom burden, quality of life, and psychological status of patients. However, there remains a gap between the use of PROs in an oncologic setting and its implementation. Furthermore, numerous reviews in PRO implementation are often based on one particular technology, setting, or health condition, making it difficult to obtain a comprehensive and coherent summary of available evidence to help plan and undertake implementation. This systematic review aims to identify and integrate enablers and barriers to PRO implementation through the comprehensive framework for implementation research (CFIR) to provide a reference for implementing patient-reported outcomes management in oncology settings.MethodsThis review strictly observed the preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines. PubMed, Web of Science, CINAHL, Embase, and PsycINFO databases were systematically searched using a three-step search strategy. The search was limited from the inception of each database to April 2024. Articles describing facilitators and barriers to implementing PROs in clinical oncology practice were included. Two researchers screened the literature independently, and the quality assessment of cross-sectional, qualitative, and mixed studies was completed using the critical appraisal tools recommended by Joanna Briggs Institute (JBI) and the mixed methods assessment tool, respectively. Basic information about the included studies and determinants affecting PRO implementation was extracted, and coding categorization of facilitators and barriers was completed based on the 48 constructs provided by the CFIR framework.ResultsWe included 30 studies from 5,649 search results, including 25 original and 5 review studies. The quality of the literature for qualitative studies was generally good, and the quality for quantitative and mixed studies was assessed as fair. We identified 52 facilitators and 50 barriers in the included literature, covering the domains used in the CFIR framework and 39 constructs, mainly including "Innovation Evidence-Base", "Innovation Complexity", "Innovation Design", "Structural Characteristics", "Compatibility", "Incentive Systems", "Access to Knowledge & Information", "Innovation Deliverers", "Innovation Recipients", and "Planning".ConclusionsThis systematic review integrated facilitators and barriers affecting PRO implementation in routine oncology clinical practice settings and categorized them through the CFIR framework. These influencing factors should be fully considered in future clinical practice to ensure the successful implementation of PROs.Trial registrationIt has been registered prospectively in PROSPERO under the registration number 42024532983.