Public Health Quiz #8: Bias and Study Errors

1. A new study is designed to assess the effectiveness of a novel antihypertensive drug. The researchers decide to enroll participants who are younger and have fewer comorbidities compared to the general population of patients with hypertension. This study is most likely to be affected by which of the following types of bias? 

Question 1 of 5

2. In a study evaluating the risk factors for developing diabetes, participants are asked to recall their dietary habits from the past year. The study finds a strong association between consumption of a specific food item and the development of diabetes. However, participants with diabetes may remember their dietary habits differently than those without diabetes. This scenario illustrates: 

Question 2 of 5

3. A pharmaceutical company sponsors a clinical trial to compare its new cholesterol-lowering drug to a placebo. The company also provides significant funding for the publication of the study results. The trial reports significantly better outcomes for the new drug compared to the placebo. This scenario raises concerns about which of the following? 

Question 3 of 5

4. In a longitudinal cohort study assessing the impact of exercise on cardiovascular health, the researchers lose contact with a significant number of participants who moved out of the area over the study period. This loss could potentially skew the study results. This issue is best described as: 

Question 4 of 5

5. A case-control study investigating the association between a rare environmental exposure and a specific cancer selects controls from a hospital's general population, not accounting for the fact that the exposure is more common in the area where the hospital is located. This mismatch could lead to: 

Question 5 of 5


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