What does statistically controlled sampling in monitoring pertain to?

What does statistically controlled sampling in monitoring pertain to?

• A. Selection of data to be verified
• B. Determination of the trial's sample size
• C. Allocation of patients to treatment groups
• D. Analysis of adverse events only

Answer: (A)

Statistically controlled sampling in monitoring refers to using a predefined statistical plan to decide which data points or records to verify against source documents. Instead of checking every item, the monitoring team selects a representative subset based on risk and statistical criteria, aiming to detect data discrepancies with a given level of confidence while using resources efficiently. This approach fits into risk‑based monitoring by focusing on high‑risk data and processes. It pertains to how data are chosen for verification, not how many participants are enrolled in the trial, how patients are allocated to treatment groups, or limiting analysis to adverse events.

Statistically controlled sampling in monitoring refers to using a predefined statistical plan to decide which data points or records to verify against source documents. Instead of checking every item, the monitoring team selects a representative subset based on risk and statistical criteria, aiming to detect data discrepancies with a given level of confidence while using resources efficiently. This approach fits into risk‑based monitoring by focusing on high‑risk data and processes. It pertains to how data are chosen for verification, not how many participants are enrolled in the trial, how patients are allocated to treatment groups, or limiting analysis to adverse events.