Which of the following best describes Level IA evidence in the hierarchy of clinical evidence?

Question

Which of the following best describes  Level IA  evidence in the hierarchy of clinical evidence?

Answer

Evidence obtained from a single, well-conducted, and well-designed randomized controlled trial

Answer

Evidence based on expert opinion or consensus guidelines

Answer

Evidence derived from observational studies and cohort studies

Answer

Evidence obtained from a meta-analysis of multiple, well-conducted, and well-designed randomized trials

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