IGNOU MFN 9 2015 2016 - Case — Control study- Intervention study

Question

Case — Control study

- Intervention study

25 Nov 2017

Answer :

Word Count : 305

Case-control studies- Case-control studies are based upon the identification of two populations of individuals - one ('cases') comprising those who have experienced the outcome of interest (e.g. Disease) and one ('controls') comprising those who have not experienced the outcome of interest (but who are otherwise comparable to the cases). As the outcome itself is involved in the selection of participants, no measures of disease frequency can be made from a case-control study, which are only used

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