To document the existence of the subject and substantiate integrity of trial data collected; to include original documents related to the trial, to medical treatment, and history of subject

• A. Signed Informed Consent Forms
• B. Source Documents
• C. Monitoring Visit Reports
• D. Certificates of Analysis

Answer: (A)

The key idea is that original source documents provide the evidence needed to prove a subject participated in the trial and that the data collected reflect what actually happened. Source documents are the primary records—medical charts, lab results, imaging studies, medication administration records, and other original data—that allow the trial team and monitors to verify that the information entered into the case report forms is accurate and complete. By keeping these originals, you can reliably reconstruct the subject’s trial events and history, supporting both existence and data integrity.

Signed Informed Consent Forms are essential because they show that a subject agreed to participate and that consent was obtained in an appropriate, ethical manner. However, they do not, by themselves, document all trial data or provide the full trail needed to verify the accuracy and completeness of the data collected. Source documents serve that purpose, linking the data in the CRFs to the actual events and treatments.

Other options like Monitoring Visit Reports or Certificates of Analysis address different aspects of trial oversight or product quality and do not establish the primary evidence of a subject’s participation or the integrity of the trial data.