Diagnostic specificity is defined as which of the following? ...

[ahriuashd]

Diagnostic specificity is defined as which of the following?
 
  A. The probability that a laboratory test will be positive in the absence of disease
  B. The probability that a laboratory test will be negative in the absence of disease
  C. A measure of how often the assay system detects the biomarker when the disease is present
  D. The probability that a disease is present when the test is positive or that a disease is absent when a test is negative

Question 2

Which of the following is NOT an NPN substance?
 
  A. Urea
  B. Ammonia
  C. Creatinine
  D. Troponin T

[Meganchabluk]

Answer to Question 1

B

Answer to Question 2

D