An intention-to-treat analysis includes:

A) Only patients who completed the study

B) All randomized participants in their originally assigned groups regardless of adherence or withdrawal

C) Only the treatment group

D) Patients who benefited

Explanation

ITT: analyzes all participants as randomized, maintaining randomization benefit and controlling for confounders. Preserves external validity. Per-protocol analysis (only completers) may overestimate treatment effect.

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