Which study type involves comparing a group receiving an intervention to a control group?A. Cohort…

➤ When should researchers choose a nonrandomized intervention study instead of an RCT?
Researchers choose nonrandomized designs when randomization is impractical, unethical, or impossible, such as emergency settings or policy evaluations. They use controlled before-after, quasi-experimental, or stepped-wedge designs, and then apply methods like matching or regression adjustment to mitigate selection bias and confounding.