Diagnostic Interpretation

Question 1

Define Accuracy

Answer 1

Trueness’ of what is being measured – compared to a control

Question 2

Define Precision

Answer 2

Repetitive test of same sample produces identical or near-identical results

Question 3

Define Interfering factors

Answer 3

Reasons for deviations or alteration of test outcomes including: improper handling/collection of the specimen, incorrect or incomplete patient prep, etc.;
Improper or inadequate patient prep to include diet, medication activity or position, pregnancy

Question 4

Define Specificity

Answer 4

Ability of a test to correctly exclude patients who do NOT have a given condition or disease

Question 5

Define Sensitivity

Answer 5

Ability of a test to correctly include patients who DO have a given condition or disease

Question 6

Define true positive

Answer 6

Patient undergoing a clinical test who DOES have the disease or condition and tests positive

Question 7

Define true negative

Answer 7

Patient undergoing a clinical test who does NOT have the disease or condition and tests negative

Question 8

Define false positive

Answer 8

Patient undergoing a clinical test who does NOT have the disease or condition and tests positive

Question 9

Define false negative

Answer 9

Patient undergoing a clinical test who DOES have the disease or condition and tests negative

Question 10

Define positive predictive value

Answer 10

Percentage of positive tests with true positive results

Question 11

Define negative predictive value

Answer 11

Percentage of negative tests with true negative results

Question 12

What do SI concentrations measure?

Answer 12

amount per volume

Question 13

What do conventrional US concentrations measure?

Answer 13

mass per volume

Question 14

What are the universal precautions?

Answer 14

Hand hygene, gloves, eye protection, occlusive dressing for open wounds, gown