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
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