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8 Cards in this Set
- Front
- Back
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Positive predictive value
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efficacy
chance that someone who tests positive will have the disease PPV=TP/TP+FP |
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Negative predictive value
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efficacy
probability that someone who tests negative for the disease will not have the disease NPV=TN/TN+FN |
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Test validity paradigm
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see index card
Gold standard Test present absent Result Positive True False Negative True False |
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Sensitivity
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Reliability of a test if a positive result is obtained
TP/TP+FN Higher the # fewer false negatives |
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Specificity
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Reliability of a test if a negative result is obtained
TN/TN+FP Higher number means few FPs |
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Relative Risk
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Epidemiology
RR = incidence of outcome in exposed ---------------------------------------------- incidence of outcome unexp RR >1 association |
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Confidence intervals
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descriptive statistic (mean, SD)
True mean is going to fall within a certain range in the normal population 95% of the time |
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Kappa
measurement measures what |
measures inter observer reliability
>75 is strong correlation |
