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Epidemiology: Case-Control Studies

Added on - 15 Jun 2021

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Running head:EPIDEMIOLOGYEpidemiologyName of the StudentName of the UniversityAuthor note
1EPIDEMIOLOGYAnswer to question 2a) The purpose of the control group in the case control design is determination of therelative size of the unexposed an exposed categories of the source population (Breslow, 2014).b) It is advantageous as it reduces the selection bias and recall bias when recruitingwomen with women breast cancer. When asked about the previous exposure both case andcontrol may give same quality of information.The disadvantage includes difficulty calculating the incidence or absolute risk and theremay be distortion of the relative risk. It may happen because the pattern of referral of cases inthe hospital based case control study may differ with those of control diseases who are notrepresentative of the source population (Breslow, 2014).c) The reason for this decision in the study is to eliminate the confounding. It will helpgain the efficiency (Pourhoseingholi et al., 2012).Answer to question 5The case control study determines the possible exposure factorsafter the incidence of theknown disease. On the contrary the retrospective cohort study the risk of developing a givendisease (breast cancer) is compared to the known exposure factors (Panageas et al., 2018).Answer to question 6a) It is the example of the recall bias as there maybe differences in the accuracy of therecollections by participants regarding the past experiences of Parkinson’s disease and headinjuries (Song & Chung, 2010).
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