Question: Select the correct statement regarding the selection of controls in a case control study: A.Controls should always come from very different geographic areas than cases.

Select the correct statement regarding the selection of controls in a case control study:

  • A.Controls should always come from very different geographic areas than cases.
  • B.Randomization can help assure comparability of cases and controls.
  • C.It is best to identify controls with conditions that are related to the outcome in the case control study.
  • D.Matching can be used to ensure that controls are similar to cases with respect to other variables

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