Question

Negative predictive value is a probability of not having disease given that you have just tested negative and is expressed as O a. True negative/(True negative False Positive) O b. True positive/(True positive False Negative) О c. True Negative/(True negative + False Negative) O d. True positive/True positive False Positive) QUESTION 10 Positive predictive value is the probability that subjects with a positive screening test truly have the disease. The equation for positive predictive value is expressed as: O 3. True negative/(True negative + False Positive) О b. True positive/True positive . Faise Negative) O C. True Negative/True negative False Negative) O d. True positive/(True positive False Positive) QUESTION 11 Sensitivity is the ability of a test to correctly identify those with the disease (true positive rate) The equation for sensitivity is expressed as True negative/(True negative False Positive) ob.True positive/True positive Faise Negative) OC. True Negative/(TruenegativeFalse Negative) O d True Bsisive/Trueposi Fais Pos) QUESTION 12 Specificity is the ability of the test to correctly identify those without the disease (true negative rate). The equation for specificity is expressed as: O a. True negative/(True negative False Positive) O b. True positive/(True positive False Negative) O c. True Negative/(True negative+ False Negative)

Answer 1

Question 1

Correct answer: option c

Rational:

Negative predictive value is the probability of subject with negative screaning test and don't have disease. So option c is correct other options incorrect.

Question 10

Correct answer: option d

Rational:

Positive predictive value is the probability of subject with positive screening test and truly have disease. So option d is correct.Other options are incorrect.

Question 11:

Correct answer: option b

Rational:

Sensitivity is a ability of the test to correctly identity the disease. So option b is correct, other options are incorrect.

Question 12

Correct answer: option a

Rational:

Specificity is the ability of the test correctly identify the person without diseases. So option a is correct, other options are incorrect.