Epidemiology homework | Science homework help
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 followingReset Selection
Question 2 of 25 |
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The measure of the benefit to the population derived by modifying a risk factor is the:Reset Selection
Question 3 of 25 |
4.0 Points |
An approach to estimating the effects due to the single exposure factor is to compute the:Reset Selection
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:Reset Selection
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 itReset Selection
Question 6 of 25 |
4.0 Points |
The strategy which is not aimed at reducing selection bias is:Reset Selection
Question 7 of 25 |
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Question 8 of 25 |
4.0 Points |
Which of the following is not a method for controlling the effects of confounding in epidemiologic studiesReset Selection
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?Reset Selection
Question 10 of 25 |
4.0 Points |
Sensitivity and specificity of a screening test refer to its:Reset Selection
Question 11 of 25 |
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Question 12 of 25 |
4.0 Points |
The adverse consequences of using a screening test which has a low specificity include:Reset Selection
Question 13 of 25 |
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The degree of agreement between several trained experts refers toReset Selection
Question 14 of 25 |
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A test that determines whether disease is actually present is a:Reset Selection
Question 15 of 25 |
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Question 16 of 25 |
4.0 Points |
The epidemiological triangle considers which factor(s) in the pathogenesis of disease:Reset Selection
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 asReset Selection
Question 18 of 25 |
4.0 Points |
An attack rate is an alternative incidence rate that is used whenReset Selection
Question 19 of 25 |
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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:Reset Selection
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:
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Question 22 of 25 |
4.0 Points |
Which of the following examples involves indirect transmission of disease?Reset Selection
Question 23 of 25 |
4.0 Points |
The ability of an agent to cause disease in the infected host is referred to as:
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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:Reset Selection
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:
