Historical control: Revision history

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21 November 2023

9 November 2023

  • curprev 11:2111:21, 9 November 2023‎ Editor iHTS talk contribs‎ 674 bytes +674‎ Created page with "A control group made up of persons who have been observed on an occasion previous to the present one involving observation of the group of interest. '''Note:''' The validity of comparisons with this type of control group is suspect because the historical group is likely to differ from the current group in its composition, diagnosis, disease severity, measurement of outcomes, or other important ways that could influence the research findings. It may be feasible to use hi..." Tag: Visual edit
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