NR 503 / NR503 Population Health, Epidemiology and Statistical Principles Week 4 Midterm Exam | Chamberlain University (60 Questions and Verified Answers) (Already graded A)| Chamberlain College

In a study of oral contraceptive (OC) use & hypertension, male interviewers for the study found a lower prevalence of OC use among participants than did female interviewers using the same questionnaire. Which term best describes this finding? • Nondifferential misclassification Question 2 A matched case-control study of sunscreen use during childhood & melanoma results in an odds ratio of 1.0. Cases of melanoma were matched by sex & race to controls who were identified by r&om digit dialing. What is the most likely explanation for the study’s null finding? • Information bias concerning past sunscreen use Question 3 Among patients with liver cancer, current alcohol drinkers have a worse prognosis for survival than nondrinkers. What would be the impact on the odds ratio for a case-control study of current alcohol use & liver cancer mortality if prevalent cases were included with incident cases of the cancer? • Decrease the odds ratio when prevalent cases are included Question 4 In a case-control study of maternal cigarette smoking as a risk factor for low birth weight, the investigators concluded that mothers of children with low birth weight were more likely to report smoking during pregnancy relative to mothers of children with normal birth weight. The reporting error most likely caused the odds ratio to: • Increase above the true value Question 5 In a case-control study of obesity & adult-onset asthma, controls are matched to cases on the basis of race & gender. This approach to selection is intended to decrease the influence of which type of bias?