Week 10 Flashcards by Fares Soliman

Q

What questions do diagnostic tests answer?

A

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Q

What are the components of diagnostic tests evaluation?

A

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Q

What do the components of diagnostic tests mean?

A

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Q

How is sensitivity calculated?

A

Sensitivityisameasureof howwellatestidentifies peoplewithadisease.
Instatisticalterms,itisthe
fractionofsubjectswiththe
diseasewhogetapositive
testresult.

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Q

Assess sensitivity

A

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Q

What is Uriscreen?

A

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Q

AyounggirlwhohasdevelopedsymptomssuggestiveofUTIistestedwiththe Uriscreenandthetestcomesbackpositive.DoesthismeanshehasUTI?

A

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Q

Explain SnOUT

A

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Q

How does specificity assess true negatives?

A

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Q

Assess

A

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Q

A

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Q

Explain SpIN

A

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Q

Explain sensitivity vs specificity

A

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Q

Explain high sensitivity, high specificity

A

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Q

Explain likelihood ratios

A

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Q

What is pretest probability?

A

Q

How are likelihood ratios assessed?

A

Q

What does a positive likelihood ratio mean?

A

Q

Calculate positive likelihood ratios: ThesensitivityofTestAforconditionA=80%or0.8, andthespecificity=94%or0.94

A

Q

How does the positive and negative likelihood ratios differs in pre and post test probability (LR+ 13.3, LR- 0.3)?

A

Q

What are the LR to probability conversions?

A

Q

Explain negative likelihood ratio

A

Q

Calculate negative likelihood ratio: Thesensitivityofourhypotheticaltest,TestA, was80%or0.8,andthespecificitywas94%or 0.94

A

Q

How would an LR - of 0.21 translate to probability?

A

How are likelihood ratios interpreted?

Assess this anterior drawer test

How would you interpret?

Compare the LR+ and LR-

Explain ROC curve

Label

Explain

What is the cut point for walking independence in hospital?

How is the credibility of diagnostic tests assessed?