Midterm2 Sp2018 SOLUTIONS.pdf - BIOST 310 Midterm Exam 2...

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BIOST 310 Midterm Exam 2 Spring 2018 1 Name : ___ Solutions_ ________________________________ There are 10 multi-part questions for a total of 19 points. For multiple choice questions, circle your answer(s). Please show your work (i.e., formulas) for questions that involve calculations You may leave mathematical expressions unevaluated 1. (1 point) Investigators are interested evaluating a treatment for prevention of neonatal jaundice. To do this they will enroll newborn babies and randomly assign half to receive an experimental therapy and the other half to receive the current standard of care. The infants will then be followed for 6 months to determine whether or not they develop jaundice. This study is an example of a A. Ecologic study B. Cross-sectional study C. Case-control study D. Cohort study E. Randomized clinical trial F. Meta-analysis study Briefly describe your rationale for your answer: Patients were randomized to treatment or control. Experimenters determined the exposure/treatment, so this is an experimental study, and specifically a randomized clinical trail 2. (1 point) A study was done to evaluate the association of cell-phone usage and risk of tumors. Researchers identified 2159 patients with brain tumors and 2162 population-based controls and used surveys to get information about past cell-phone usage. What is the best description of this study design? A. Ecologic study B. Cross-sectional study C. Case-control study D. Cohort study E. Randomized clinical trial F. Meta-analysis study Briefly describe your rationale for your answer: The patients were sampled based on their disease status, so a case-control study 3. (1 point) A team of investigators interested in effects of slate dust exposure randomly selected 1000 citizens from a community that had a large percentage of the population employed in slate-related industries. Participants who consented to take part in the study were asked to fill out a diary for the last year that would be used to estimate their recent slate dust exposure. Participants were also given a medical examination to assess various pulmonary health measures, as well as potential confounding factors such as smoking. This is an example of a A. Ecologic study B. Cross-sectional study C. Case-control study D. Cohort study E. Randomized clinical trial F. Meta-analysis study Briefly describe your rationale for your answer: Participants were all evaluated at just one point in time, so a cross-sectional study. Half credit was
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