Which elements are described in a protocol?

• A. The recruitment budget
• B. Objectives, design, methods, and conduct of a trial
• C. The data collection sheets only
• D. The investigator's qualifications only

Answer: (B)

A protocol is the master plan for a clinical trial, outlining what will be studied and how the study will be carried out. The essential elements include the objectives (what the trial aims to determine), the design (the overall structure, such as randomized or blinded), the methods (how participants are selected, what interventions or treatments are used, and the procedures followed), and the conduct of the trial (how it will be run, including schedules, monitoring, and safety considerations). Together, these components define the scope and approach of the study and guide every step from start to finish.

The other options don’t capture the full scope of a protocol. A recruitment budget is more about budgeting than the plan of the trial itself. Data collection sheets are tools used to collect data and aren’t the comprehensive description of how the trial is designed and conducted. The investigator’s qualifications may be important for site oversight, but they aren’t the core content of the protocol, which centers on the study’s aims, design, methods, and conduct.