A pragmatic approach to selecting a grading system for clinical practice recommendations in palliative care

Background: The limited palliative care evidence base is poorly amenable to existing grading schemes utilized in guidelines. Many recommendations are based on expert consensus or clinical practice standards, which are often considered 'low-quality' evidence. Reinforcing provider hesitancy in translating recommendations to practice has implications for patient care. Aim: To rationalize the selection of an appropriate grading system for rating evidence to support recommendations made in palliative care clinical practice guidelines. Design: Review of the methodology sections of international palliative care guidelines published in English identified five grading systems comparison: Grading of Recommendations, Assessment, Development and Evaluations (GRADE); the Scottish Intercollegiate Guidelines Network (SIGN); Infectious Diseases Society of America-European Society for Medical Oncology (IDSA-ESMO); Confidence in the Evidence from Reviews of Qualitative research (CERQual) and the National Service Framework for Long Term Conditions (NSF-LTC). Results: There is heterogeneity among grading systems used in published palliative care or terminal symptom management guidelines. GRADE has been increasingly adopted for its methodological rigour and inter-guideline consistency with other medical associations. CERQual has the potential to support recommendations informed by qualitative evidence, but its role in clinical guidelines is less defined. The IDSA-ESMO system has an intuitive typology with the ability to categorize tiers of lower-quality evidence. Conclusions: It is challenging to apply commonly used grading systems to the palliative care evidence base, which often lacks robust randomized controlled trials (RCTs). Adoption of IDSA-ESMO offers a feasible and practical alternative for lower-resourced guideline developers and palliative clinicians without a prerequisite for methodological expertise.