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8 September, 21:52

Why are controls needed in a case-control study?

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  1. 9 September, 01:45
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    Controls are needed in a case-controlled study because the outcome would be invalid if there were no base controls to start with. It would be like trying to determine which cancer is more aggressive but if you don't have a control in place or to go by, your research would not have any validity.
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