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单词 observational study
释义
observational study
As an observational study it cannot prove cause and effect, but merely point out associations.
Times,Sunday Times
The authors cautioned it was an observational study and more work was needed.
Times,Sunday Times
He cautioned that more research was needed and that, as an observational study, it only showed an association with the activity.
Times, Sunday Times
This keeps the whole data collection process of the observational study entirely unobtrusive.
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In an observational study, however, researchers have no control over who receives the treatment.
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更新时间:2024/12/23 17:22:34