The strategy which is not aimed at reducing selection bias is development of an

The strategy which is not aimed at reducing selection

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28. The strategy which is not aimed at reducing selection bias is: development of an explicit caseencouragement of high participation rates.standardized protocol for structured interviews. ** (p. 734)enrollment of all cases in a defined time and region. 29. Identify which of the following six types of study designs most appropriately characterizes thesituation described below. You are interested in finding out whether middle-aged men who have premature ventricular contractions(PVCs) are at greater risk of developing a myocardial infarction (heart attack) than men whoseheartbeats are regular. Electrocardiogram (ECG) examinations are performed on all male officeemployees 35 years of age or older who work for oil companies in Houston. The ECG tracings areclassified as irregular or regular. Five years later, myocardial infarction rates are compared betweenthose with and those without baseline ECG irregularities. 30. Case-control studies are among the best observational designs to study diseases of:
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31. In contrast to observational studies, intervention studies are employed to: 32. Question 32An abrupt drop in mortality due to a specific disease from one year to the next is most likely due to: incorrect listing of cause of death by the physician on the death certificatecoding mistake when using the International Classification of Disease (ICD) system A and Ba change in the International Classification of Disease (ICD) system ** (p. 251)fewer older persons dying from chronic diseases each year 33. An epidemiologic experiment is performed in which one group is exposed to a suspected factor andthe other is not. All individuals with an odd hospital admission number are assigned to the second group.The main purpose of this procedure is to:
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  • Fall '16
  • Tirizia York
  • Epidemiology, prospective cohort study

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