What should the analysis plan address?

What should the analysis plan address?

• A. The protocol should have a specified analysis plan appropriate for the objectives and design.
• B. Analysis is optional if results are clear.
• C. Analysis should be conducted only after study completion.
• D. Analysis does not need to consider early withdrawals.

Answer: (A)

The analysis plan must be pre-specified in the protocol and matched to the study’s objectives and design. This upfront plan lays out which endpoints will be analyzed, which analysis population will be primary (for example, all randomized participants under an intention-to-treat framework), the statistical methods to use, how missing data will be handled, and whether any interim analyses or multiple comparisons adjustments are planned. Having these details in advance helps prevent bias from data-dredging, ensures the results are interpretable and credible, and supports regulatory review by showing that the analyses were defined before seeing the data. Analyses aren’t optional or something to decide only after results are clear, and while some analyses can occur after study completion, they should be defined beforehand. The plan must also address how early withdrawals and missing data will be treated, so the integrity of the primary conclusions isn’t compromised.

The analysis plan must be pre-specified in the protocol and matched to the study’s objectives and design. This upfront plan lays out which endpoints will be analyzed, which analysis population will be primary (for example, all randomized participants under an intention-to-treat framework), the statistical methods to use, how missing data will be handled, and whether any interim analyses or multiple comparisons adjustments are planned. Having these details in advance helps prevent bias from data-dredging, ensures the results are interpretable and credible, and supports regulatory review by showing that the analyses were defined before seeing the data.

Analyses aren’t optional or something to decide only after results are clear, and while some analyses can occur after study completion, they should be defined beforehand. The plan must also address how early withdrawals and missing data will be treated, so the integrity of the primary conclusions isn’t compromised.