evidence

What are the Types of Evidence?

Evidence can be categorized into several levels based on its strength and reliability. These include:
1. Level I: Systematic reviews and meta-analyses of randomized controlled trials.
2. Level II: Well-designed randomized controlled trials.
3. Level III: Controlled trials without randomization.
4. Level IV: Case-control and cohort studies.
5. Level V: Systematic reviews of descriptive and qualitative studies.
6. Level VI: Single descriptive or qualitative studies.
7. Level VII: Expert opinion and reports from expert committees.

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