In a multicenter trial, who is primarily responsible for ensuring standardized data collection across sites?

• A. Each investigator independently determines data collection.
• B. The coordinating investigator and other participating investigators, as documented in their responsibilities.
• C. The sponsor alone.
• D. The regulatory authorities.

Answer: (B)

In multicenter trials, standardizing data collection is done through clearly defined responsibilities assigned to the coordinating investigator along with the other participating investigators, and these roles are documented in the trial’s responsibilities. The coordinating investigator leads across sites, implementing uniform data collection tools (like common case report forms or electronic data capture templates), providing training to site staff, and enforcing consistency through the Data Management Plan, monitoring, and routine data quality checks. The participating investigators at each site carry out data collection according to these documented responsibilities, ensuring the same definitions, timing, and procedures are applied everywhere. The sponsor supplies the protocol, forms, and data management plan, but does not personally handle day-to-day data collection across sites, and regulatory authorities oversee compliance rather than manage routine data collection.