Epidemiology Homework

Epidemiology Homework
Epidemiology Homework
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Question 1 of 25
4.0 Points
When assessing a positive relationship between alcohol consumption and oral cancer using a case-control study, increasing the sample size of the study will result in which of the following
Question 2 of 25
4.0 Points
The measure of the benefit to the population derived by modifying a risk factor is the:
Question 3 of 25
4.0 Points
An approach to estimating the effects due to the single exposure factor is to compute the:
Question 4 of 25
4.0 Points
A statistical association may be causal or noncausal. In addition, many diseases require that more than one factor be present for disease to develop. Examples of multiple causation models include:
Question 5 of 25
4.0 Points
You are investigating the role of physical activity in heart disease and suggest that physical activity protects against having a heart attack. While presenting these data to your colleagues, someone asks if you have thought about confounders such as factor X. This factor X could have confounded your interpretation of the data if it
Question 6 of 25
4.0 Points
The strategy which is not aimed at reducing selection bias is:
Question 7 of 25
4.0 Points
The purpose of a double-blind study is to
Question 8 of 25
4.0 Points
Which of the following is not a method for controlling the effects of confounding in epidemiologic studies
Question 9 of 25
4.0 Points
Surgeons at Hospital A report that the mortality rate at the end of a one-year follow-up after a new coronary bypass procedure is 15%. At Hospital B, the surgeons report a one-year mortality rate of 8% for the same procedure. Before concluding that the surgeons at Hospital B have vastly superior skill, which of the following possible confounders would you examine?
Question 10 of 25
4.0 Points
Sensitivity and specificity of a screening test refer to its:
Question 11 of 25
4.0 Points
Lead time bias is best described as:
Question 12 of 25
4.0 Points
The adverse consequences of using a screening test which has a low specificity include:
Question 13 of 25
4.0 Points
The degree of agreement between several trained experts refers to
Question 14 of 25
4.0 Points
A test that determines whether disease is actually present is a:
Question 15 of 25
4.0 Points
A person with an inapparent infection
Question 16 of 25
4.0 Points
The epidemiological triangle considers which factor(s) in the pathogenesis of disease:
Question 17 of 25
4.0 Points
The Centers for Disease Control and Prevention published an article concerning the high rate of foot fungal disease in New Orleans. The article explains that there has been a high rate of foot fungal disease in New Orleans for decades. Foot fungal disease in New Orleans is best described as
Question 18 of 25
4.0 Points
An attack rate is an alternative incidence rate that is used when
Question 19 of 25
4.0 Points
Host factors in the causation of disease include:
Question 20 of 25
4.0 Points
An outbreak of salmonellosis occurred after an epidemiology department luncheon, which was attended by 485 faculty and staff. Assume everyone ate the same food items. Sixty-five people had fever and diarrhea, five of these people were severely affected. Subsequent laboratory tests on everyone who attended the luncheon revealed an additional 72. The attack rate of salmonellosis was:
Question 21 of 25
4.0 Points
An outbreak of salmonellosis occurred after an epidemiology department luncheon, which was attended by 485 faculty and staff. Assume everyone ate the same food items. Sixty-five people had fever and diarrhea, five of these people were severely affected. Subsequent laboratory tests on everyone who attended the luncheon revealed an additional 72 cases. The virulence of salmonellosis was:
Question 22 of 25
4.0 Points
Which of the following examples involves indirect transmission of disease?
Question 23 of 25
4.0 Points
The ability of an agent to cause disease in the infected host is referred to as:
Question 24 of 25
4.0 Points
Community A receives its water from several sources. The water source responsible for causing an outbreak of disease X is unknown. The best evidence to determine which suspected water supply is responsible would be:
Question 25 of 25
4.0 Points
The table below shows the mumps experience of children in 390 families exposed to mumps by a primary case within the family:
Population
Cases
Age in years
Total
No. susceptible before primary cases occurred
Primary
Secondary
2 ? 4
300
250
100
50
5 ? 9
450
420
204
87
10 ? 19
152
84
25
15
The secondary attack rate among children aged two to four years is:

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