Lab techniques

Question 1

Pre-test probability

Answer 1

likelihood of the patient having a diagnosis prior to test

Question 2

Post-test probability

Answer 2

likelihood of the patient having a diagnosis once the test result is available

Question 3

Sensitivity

Answer 3

probability a test is positive if disease is present i.e. tells us disease is there when it is

Question 4

Specificity

Answer 4

probability a test is negative if the disease is absent i.e. tells us when disease definitely isn’t there