A study's hypothesis that a new surgical approach produces safer outcomes in immunosuppressed patients is tested in a 14-site research study across the United States. Subjects at all sites are randomly selected and randomly assigned to experimental versus control groups. What strategy is used in this research project?

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The strategy used in this research project is a Randomized-controlled trial (RCT). In an RCT, subjects are randomly assigned to either the experimental group receiving the intervention being tested or to a control group. This method is considered the gold standard for testing the efficacy of new treatments or interventions because it minimizes bias and ensures that any differences observed between the groups are likely due to the intervention itself rather than other factors.

A Study's Hypothesis That a New Surgical Approach Produces Safer