Question

True or False

1.A key difference between analytic and descriptive studies this that analytic studies are causally oriented. True or False

2.If the relative risk of developing diabetes among residents of Springfield and Boston is 1 it means that the risk of developing diabetes is the same in both cities. True or False

3.Cohort studies are often used to study rare health outcomes. True or False

4.Sensitivity and specificity of a screening test is the same in all populations. True or False

5.When a screening test has high sensitivity but low specificy it means that more people without a disease will be classified as potentially having the disease. True or False

6. If a screening test has a high number of false positives, its specificity is likely to be low. True or False

7.A false negative screening result refers to when an individual tests negative but actually has the disease. True or False

Which of the following factors will influence the population attributable fraction?

Question 19 options:

	1) The relative risk of disease associated with exposure
	2) The incidence of the disease
	3) The prevalence of the exposure
	4) The prevalence of the disease
	5) 1 and 3

Answer 1

1. False

2. True

3. True

4. False

Sensitivity means : true positive , i.e. screening test will be positive among those who are dieased.

Specificity means : true negative, i.e. screening test will be negative among those who are without disease.

5. False

6. False

7. True