Epidemiology Homework

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

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Question 2 of 25

4.0 Points

The measure of the benefit to the population derived by modifying a risk factor is the:

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Question 3 of 25

4.0 Points

An approach to estimating the effects due to the single exposure factor is to compute the:

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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:

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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

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Question 6 of 25

4.0 Points

The strategy which is not aimed at reducing selection bias is:

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Question 7 of 25

4.0 Points

The purpose of a double-blind study is to

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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 studies

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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?

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Question 10 of 25

4.0 Points

Sensitivity and specificity of a screening test refer to its:

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Question 11 of 25

4.0 Points

Lead time bias is best described as:

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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:

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Question 13 of 25

4.0 Points

The degree of agreement between several trained experts refers to

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Question 14 of 25

4.0 Points

A test that determines whether disease is actually present is a:

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Question 15 of 25

4.0 Points

A person with an inapparent infection

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Question 16 of 25

4.0 Points

The epidemiological triangle considers which factor(s) in the pathogenesis of disease:

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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

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Question 18 of 25

4.0 Points

An attack rate is an alternative incidence rate that is used when

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Question 19 of 25

4.0 Points

Host factors in the causation of disease include:

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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:

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Question 21 of 25

4.0 Points

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Question 22 of 25

4.0 Points

Which of the following examples involves indirect transmission of disease?

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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:

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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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