biostatistics

Question 1

sensitivity

Answer 1

• probability that a screening test with be positive in patients with a dz
• A/(A+C)

Question 2

specificity

Answer 2

• probability that a test will be negative in patients without a dz
• D/(D+B)

Question 3

positive predictive value

Answer 3

• probability that a patient with a positive test has the dz

- A/(A+B)

Question 4

negative predictive value

Answer 4

• probability that a patient with a negative test doesn’t have the dz
• D/(C+D)

Question 5

prevalence

Answer 5

• total number of cases/ population

Question 6

incidence

Answer 6

• the number of new cases diagnosed in a year/ total population