General instructions:
Please complete the following assignment corresponding to Parts 4-5 of Epidemiologic Study Design by no later than Monday, October 26th at 11pm SAST/12am EAT.
At the end of the assignment we ask you to please note 1) approximately how much time you spent on the homework and how much time you spent reviewing the materials (videos and learning checks) , 2) what questions, if any, you have from the videos and/or any places you might have gotten stuck in the assignment, and 3) provide your feedback on the this week’s content and materials. Thank you once again for your assistance in completing these additional questions!
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Question 1 of 20
1. Question
Instructions: Please select the best study design from the list below for the research questions in Questions 1-6. Briefly justify your choice.
- Randomized controlled trial
- Quasi-experimental study
- Cohort study
- Case-control study
- Cross-sectional study
- Case-crossover study
- Ecological study
1. Is preexisting thyroiditis associated with higher risk of thyroid lymphoma (incidence is around 2 per million persons)?
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Question 2 of 20
2. Question
2. Is the COVID-19 infection rate higher in cities with greater population density?
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Question 3 of 20
3. Question
3. Are eating disorders more common in males or females aged 13 to 18 years old?
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Question 4 of 20
4. Question
4. Does smoking marijuana in childhood have a long-term effect on cognitive function?
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Question 5 of 20
5. Question
5. Is warfarin or aspirin better at preventing strokes in people with atrial fibrillation?
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Question 6 of 20
6. Question
6. Is driver’s use of cell phones associated with a higher risk of motor vehicle crashes?
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Question 7 of 20
7. Question
Please answer Questions 7 & 8 based on the following:
A population-based case-control study will explore the relationship between past oral contraceptive use and postmenopausal endometrial cancer. In sampling the study base from which the cases arose:
7. Should women who underwent hysterectomy premenopausally be excluded from the controls? Why or why not?
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Question 8 of 20
8. Question
8. Should women who did not use oral contraceptives for religious reasons be excluded from the controls? Why or why not?
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Question 9 of 20
9. Question
The table below comes from a compilation of results of case-control studies of epithelial ovarian cancer in relation to body mass index (BMI). The first group of studies was hospital-based, using as controls hospitalized women without ovarian cancer. The second group was population-based, using as controls women from the community selected in a variety of ways (e.g., random digit dialing, driver’s license records), depending on the study. Assume that in all studies, information was obtained on more than 80% of eligible cases and controls.
9. While there appears to be an association between BMI and ovarian cancer in the population-based studies, it is not present in the hospital-based studies. What is the most likely explanation for the difference?
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Question 10 of 20
10. Question
Read the article by Lalla et al. (2007) and answer questions 10-12: Lalla et al
10. What motivated the study?
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Question 11 of 20
11. Question
11. What is the study design?
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Question 12 of 20
12. Question
12. What are the conceptual and operational definitions of the exposure and the outcome?
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Question 13 of 20
13. Question
How much time did you spend on this homework?
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Question 14 of 20
14. Question
Please include here any questions from the recorded lectures or homework that you would like to be addressed during the lab session.
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Question 15 of 20
15. Question
Your feedback is important to us. So that we can adequately adjust the lecture materials, please answer the questions below relating to each of this week’s topics:
Part 4: Case-Control Study
Was the amount of information presented too little, just right, or too much?
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Question 16 of 20
16. Question
The lecture’s contents were clearly explained.
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Question 17 of 20
17. Question
How was the pace of the lecture?
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Question 18 of 20
18. Question
Part 5: Other Study Designs
Was the amount of information presented too little, just right, or too much?
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Question 19 of 20
19. Question
The lecture’s contents were clearly explained.
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Question 20 of 20
20. Question
How was the pace of the lecture?
CorrectIncorrect