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techniques we perform to quantify a patient's impairment, functional limitation or disability. ex. impairment, activity limitation, participation restrictionmeasuresWhat is necessary for results to be valid?-subjects with all stages of the condition
-investigators evaluated for the reliability of the measure
-compares results from the index clinical measure to results from a gold standard clinical measure
-were the results blind
-was the time between the index clinical measure and gold standard short enough to minimize change
-did investigators confirm their findings with a new set of subjects?Ability of the test to correctly identify (+ test result) in someone with the disorder. screening. has false negatives.
a. Sn
b. SpaAbility of the test to correctly identify (- test result) in someone without the disorder. diagnostic. has false positives.
a. Sn
b. Spbability of the test to correctly determine the % of people with the disorder from all of the people with positive results. This is the measure of true positives
a. negative likelihood ratio
b. positive likelihood ratio
c. negative predictive value
d. positive predictive valuedThe likelihood that a positive test result was observed in a person with the disorder vs. a person without the disorder of interest
a. negative likelihood ratio
b. positive likelihood ratio
c. negative predictive value
d. positive predictive valuebability of the test to correctly determine the % of people without the disorder from all of the people with a negative test result. This is the measure of true negatives
a. negative likelihood ratio
b. positive likelihood ratio
c. negative predictive value
d. positive predictive valuecThe likelihood that a negative test result is observed in a person with the disorder vs. in a person without the disorder of interest
a. negative likelihood ratio
b. positive likelihood ratio
c. negative predictive value
d. positive predictive valueacondition present, clinical test +
a. true negative
b. false negative
c. true positive
d. false positiveccondition present, clinical test -
a. true negative
b. false negative
c. true positive
d. false positivebcondition absent, clinical test +
a. true negative
b. false negative
c. true positive
d. false positivedcondition absent, clinical test -
a. true negative
b. false negative
c. true positive
d. false positiveaproportion of patients with the condition who have a positive test result TP/FN
a. sensitivity
b. specificityaproportion of patients without the condition who have a negative test result FP/TN
a. sensitivity
b. specificitybused to reduce uncertainty about a patient's likelihood of having the target condition.
a. sp
b. sn
c. likelihood ratios
d. false/true negative/positivecif a test is positive use PLR. This is always
a. >1
b. <0.5
c. >10
d. <10aif a dianostic test is negative use NLR. this is always
a. >1
b. <1
c. >10
d. <10bLarge shift for + LR from pretest to posttest
a. <0.1
b. 5-10
c. >10cLarge shift for - LR from prestest to posttest
a. <0.1
b. 5-10
c. >10a

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