What is true about reporting the mean difference between two groups in a meta-analysis?
A) It is a measure of differences between nominal data for the two groups.
B) It is an estimate of the effect of differences between the two groups of subjects.
C) It is not used to examine differences in ratio-level data.
D) It is appropriate only when the same scale is used to measure outcomes.

Question

Quizplus · Accepted Answer

The mean difference is reported in a meta-analysis to identify the effect of an intervention but is appropriate only if the outcome is measured by the same scale in all the studies.It is not used to compare nominal data but is useful for ordinal and ratio-level data.It measures differences in outcomes and not subjects.

What Is True About Reporting the Mean Difference Between Two