Meta-analyses should avoid the “apples and oranges” problem. What does this mean?
A. |
The meta-analysis should focus primarily on topics relating to nutrition and health promotion. |
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B. |
All of the studies in the review should focus on the same research question. |
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C. |
The meta-analysts should be the same researchers as those who did the primary studies. |
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D. |
The same instruments should be used to measure the outcomes in all the studies in the review. |
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