A nurse is reviewing literature for an evidence-based practice study. Which study should the nurse use for the $\bold{most}$ reliable level of evidence that uses statistics to show effectiveness?
A) Meta-analysis
B) Systematic review
C) Single random controlled trial
D) Control trial without randomization

Question

Quizplus · Accepted Answer

The main difference is that in a meta-analysis the researcher uses statistics to show the effect of an intervention on an outcome. In a systematic review no statistics are used to draw conclusions about the evidence. A single random controlled trial (RCT) is not as conclusive as a review of several RCTs on the same question. Control trials without randomization may involve bias in how the study is conducted.

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