Systematic review of conceptual and theoretical frameworks used in palliative care and end-of-life care research studies.

We examined palliative and end-of-life research studies to identify and characterize conceptual or theoretical frameworks proposed or utilized. Of 44 frameworks we reviewed, 21 studies (47.7%) were aligned with a Clinical Practice Guideline's single domain, while the rest two or more of eight guidelines in quality palliative care domains.