Which concept is primarily supported by documentation that ensures the integrity and accuracy of trial data?

• A. Adverse event reporting
• B. Patient enrollment speed
• C. Informed consent validity
• D. Data integrity

Answer: (D)

Data integrity in clinical trials relies on documentation that proves each data point is accurate, complete, and traceable. The records—the source documents, case report forms, data management logs, and audit trails—show that data were collected correctly, entered properly, and any changes were authorized with clear explanations and timestamps. This aligns with GCP expectations like ALCOA and related principles, which require data to be attributable, legible, contemporaneous, original, accurate, complete, consistent, enduring, and available. The other options relate to safety reporting, ethical consent, or recruitment operations, not the overall accuracy and verifiability of the trial data. So, the documentation that ensures the integrity and accuracy of trial data best supports data integrity.