Running Head: CASE-CONTROL STUDY1Case-control studyStudent Name:Course Name & Number:Professors Name:Date:CASE-CONTROL STUDY2IntroductionA case-control study is used to make comparison between patients with a particulardisease of interest against other group of patients without the disease. The patients with thedisease are used as the cases while those without the outcome of interest are used as the controls.Case-control studies are also often known as case-referent study (Zondervan, Cardon &Kennedy, 2002). It is a category of observational study whereby two groups with variedoutcomes are identified and equated on the basis of an identified causal agent. Just like in thecase of the investigator who seeks to determine whether smoking is a risk factor for pancreaticcancer, case-control studies are employed to identify causative agents of various medicalconditions by comparing the cases against the controls. Case-control studies are oftenutilized specialized in health care (Zondervan, Cardon & Kennedy, 2002). The primary reasoncase-control studies are popular in this profession is because they employ fewer resources.However, although the use of limited resources poses as advantage for the studies, this is alsotheir greatest weakness as they produce minimal evidence for causal inference when compared toother types of observational studies such as randomized controlled trial.Selection of the control groupThe control group should not ...
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