Physician Data Query (PDQ) is the NCI-sponsored cancer information system offering structured summaries and resources for oncology care and research.
It includes peer-reviewed evidence summaries and trial-related information that can be used to support study design decisions and clinical context. Researchers may leverage PDQ to ensure protocol rationale reflects current oncology standards and terminology. PDQ also helps harmonize communication across clinical teams by providing consistent, referenced explanations of treatment approaches and outcomes. Its use supports stronger evidence framing and more credible oncology trial documentation.