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14589 Surgery

All the following statements concerning meta- analysis are true EXCEPT.

AIt is a study in which the units of analysis are populations or groups of people, rather than individuals.
BIt is used to enhance the statistical power of research findings where number in available studies are too small
CIt is applied by pooling results of small, randomized, controlled trials when no single trial has large enough numbers to reach statistical significance
DIt combines results from different studies to obtain a numerical estimate of an overall effect
Surgery
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