Question

QUESTION 1

Sensitivity of the measurements of exposure can be classified as a measure of:

A. Generalizability

B. Validity

C. Precision

D. Causality

QUESTION 2

Two screening tests are available for Disease X. Test A has a sensitivity of 70% and a specificity of 95%; Test B has a sensitivity of 80% and a specificity of 90%. Which test produces the greater percentage of false negatives?

A. Test A

B. Test B

C. Both produce same percentage.

D. It cannot be determined from the information given.

QUESTION 3

Two screening tests are available for Disease X. Test A has a sensitivity of 70% and a specificity of 95%; Test B has a sensitivity of 80% and a specificity of 90%. Which test produces the greater percentage of false positives?

A. Test A

B. Test B

C. They produce the same number of false positives.

D. None of the above

QUESTION 4

Using the sequential testing approach in a screening program will increase the net sensitivity of the program.

True OR False

QUESTION 5

You are considering instituting screening for Disease X. For a screening program to be effective, which of the following must be true?

A. The critical point of the disease needs to predate the appearance of symptoms.

B. The sensitivity and the specificity of the test should be balanced at 50%.

C. The incidence of Disease X should be at least 30 per 1000.

D. The prevalence of Disease X should be at least 30 per 1000.

E. None of the above.

Answer 1

QUESTION 1

Sensitivity of the measurements of exposure can be classified as a measure of Validity.

QUESTION 2

Option (A), that is Test A

QUESTION 3

Option (C), that is, they produce the same number of false positives.

QUESTION 4

Using the sequential testing approach in a screening program will increase the net sensitivity of the program         FALSE.

QUESTION 5

Option (B), that is, the sensitivity and the specificity of the test should be balanced at 50%.