CATO Associate Protocol Development & Study Design Flashcards

What is the role of the Statistical Analysis Plan (SAP) in clinical trial protocol development?

Answer: To pre-specify statistical methods and analyses before unblinding

The SAP is finalized before database lock and unblinding to pre-specify all statistical methods, preventing post-hoc manipulation of analyses that could bias results.

What does 'sample size calculation' in a clinical protocol primarily determine?

Answer: The minimum number of participants needed to detect a meaningful treatment effect

Sample size calculations ensure the study has adequate statistical power to detect a clinically meaningful difference between treatment arms, if one truly exists.

In a crossover study design, what distinguishes it from a parallel group design?

Answer: Each participant receives more than one treatment in sequence

In a crossover design, each participant receives multiple treatments in different periods, allowing each person to serve as their own control and reducing inter-subject variability.

Which ICH guideline provides the foundational framework for the design, conduct, recording, and reporting of clinical trials?

Answer: ICH E6(R2)

ICH E6(R2) is the Good Clinical Practice (GCP) guideline that establishes international standards for the design, conduct, performance, monitoring, auditing, recording, analysis, and reporting of clinical trials.

What is the 'washout period' in a clinical trial protocol?

Answer: A period between treatment phases during which a prior treatment is cleared from the body

A washout period in crossover or sequential studies allows previously administered treatments to be eliminated from the body before the next treatment is started, preventing carryover effects.

Which element is essential for ensuring the protocol clearly defines what constitutes the primary endpoint?

Answer: Operational definition including measurement method, timing, and assessor

A primary endpoint must be precisely operationalized with a clear measurement method, the time point of assessment, and who performs the assessment to ensure consistent data collection.

What is an adaptive clinical trial design?

Answer: A design that allows pre-specified modifications to the trial based on interim data

Adaptive designs permit pre-specified, data-driven modifications to study parameters (such as sample size or dose) during the trial while maintaining scientific validity and controlling the type I error rate.