The highest level of evidence is known to be provided by what?
a. Meta-analysis
b. Systematic review
c. Effect size
d. Integrative review
ANS: A
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A Meta-analysis provides Level I evidence, the highest level of evidence, as it statistically analyzes and integrates the results of many studies.
B Systematic review is not known to provide the same level of evidence as meta-analysis.
C Effect sizes are calculated using the difference in the averages scores between the intervention and control groups from each study.
D Integrative review is not known to provide the same level of evidence as meta-analysis.
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