exam 1 (EBM)

Question 1

what is EBSM

Answer 1

• the best research evidence available
• clinical experience
• patient values

Question 2

what is EBSM a balance of

Answer 2

art and science

Question 3

what is the formula for sensitivity

Answer 3

True positive/(true positive + False Negative)

Question 4

what is the formula for Specificity

Answer 4

True Negative/(true negative + False positive)

Question 5

what does the values range from for Sn and Sp and what does the higher values represent

Answer 5

range from 0-1 and the higher values represent better test

Question 6

test with high sensitivity are good at ruling?

Answer 6

Out a condition

Question 7

test with high specificity are good at ruling

Answer 7

In a condition

Question 8

what does a (+LR) exprss?

Answer 8

the PROBABILITY a condition is PRESENT when an exam is POSITIVE

Question 9

what is the formula for +LR

Answer 9

sensitivity/(1-specificity)

Question 10

what does (-LR) express

Answer 10

the PROBABILITY a condition is PRESENT although the exam is NEGATIVE

Question 11

what is the formula for -LR

Answer 11

(1- sensitivity)/ specificity

Question 12

what does an exam with +LR of 6 mean

Answer 12

a positive test inidicates the patient is 6 times more likely to have the condition than someone with a negative result

Question 13

what does an exam with -LR of 0.1 mean

Answer 13

a negative exam is found in only 1 in 10 patients

Question 14

whats the probability that a condition is present if its between (+ LR > 10 or –LR

Answer 14

large

Question 15

whats the probability that a condition is present if its between (+LR of 5-10 or – LR 0.1-0.2)

Answer 15

moderate

Question 16

whats the probability that a condition is present if its between (+LR of 2-5 or –LR 0.2-0.5)

Answer 16

small

Question 17

whats the probability that a condition is present if its between (+LR of 1-2 or –LR 0.5-1)

Answer 17

very small