1B : evidence based practice princples on diagnostic testing

Question 1

___ of data is vital to accurate and efficient clinical decision making

Answer 1

quality

Question 2

what is the gold standard of test

Answer 2

the test that others test are compared to

Question 3

what is the difference between true positive and false positive

Answer 3

true positive is if you have the disease and the test says t you have it

false postive is if you don’t have the disease and the test says you have it

Question 4

what is the difference between false negative and true negative

Answer 4

false negative is if you have the disease but the test says you don’t

true negative is if you don’t have the disease and the test says you don’t

Question 5

what is defined as Given that the individual has the
condition, probability that test will be (+)

Answer 5

sensitivity

Question 6

what is defined as Give that the individual does
NOT have the condition, probability that test will be (-)

Answer 6

specificity

Question 7

what is positive predictive value

Answer 7

given a positive test result , the probability that the person has the condition

Question 8

what is negative predictive value

Answer 8

given a neg test result , the prob that the person does not have the condition

Question 9

what are the limitations when using predictive values

Answer 9

sample specific

depends highly on prevalence of condition in study population

Question 10

condition with a low prevalence will have what for positive and negative

Answer 10

low positive values and higher negative values

Question 11

what is considered true positive rate

Answer 11

sensitivity

Question 12

a test with a high sensitivity value that when negative it helps ___ ___ a condition

Answer 12

rule out

Question 13

what is considered true neg rate

Answer 13

specificity

Question 14

a test with a high specificity value that when positive helps ___ ___ a condition

Answer 14

rule in

Question 15

does a diagnostic test rule in or rule out ?
does a good screening rule in or rule out

Answer 15

rule in
rule out

Question 16

what can be used to quantify shifts in probability given a certain test result

Answer 16

likeihood ratio

Question 17

what is the implication of a positive likeihood ratio

Answer 17

the probability that someone has thepositive result

Question 18

what is the implication of a negative likeihood ratio

Answer 18

with a neg test , it is the prob that it will be negative test

Question 19

do you want the +LR to be low or high? what about -LR

Answer 19

high and low

Question 20

if the positive LR >10 then what does it mean

Answer 20

large shifts in probability

Question 21

what kind of shifts does a positive LR of 5-10 give

Answer 21

mod shifts in probability

Question 22

what kind of shifts in probability will be shown with a positive LR of 2-5

Answer 22

small but sometimes important shifts in probability

Question 23

what kind of shifts in probability will be shown with a positive LR of 1-2

Answer 23

small and not important

Question 24

what kind of shifts in probability will be shown with a negative LR of <.10

Answer 24

large shifts

Question 25

what kind of shifts in probability will be shown with a negative LR of 0.1 - 0.2

Answer 25

moderate shifts

Question 26

what kind of shifts in probability will be shown with a negative LR of 0.2-0.5

Answer 26

small but sometimes important

Question 27

what kind of shifts in probability will be shown with a negative LR of 0.5-1

Answer 27

small and not important

Question 28

what probability is based on clinical info and/or previous research

Answer 28

pre test probability

Question 29

what provides the most powerful tool for quantifying the important of a particular test

Answer 29

LRs

Question 30

what is the statistic used to represent the amount of change needed to exceed measurement error of the test

Answer 30

minimal detectable change

Question 31

if there is a increase reliability of a test what happens to the MDC value in that population

Answer 31

decreases it

Question 32

MCID should not exceed the ___

Answer 32

MDC

Question 33

what is the Smallest difference detected that
represents an important improvement from the perspective of individuals w/ the
condition

Answer 33

MCID

Question 34

what is the diagnostic process bases on probabilities & the revision of probabilities

Answer 34

evidence based practice

Question 35

what are the 3 psychometric properties of test

Answer 35

reliability
validity
responsiveness