Term
| flow chart for incubation period and latent period. |
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Definition
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Term
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Definition
| tests that are very sensitive or specific (or both) |
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Term
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Definition
| test results that provide useful information to investigate or for diagnostic process |
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Term
| compare/contrast screening tests and diagnostic tests |
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Definition
screening:
-populations
-healthy
-early detection of pathological process or impaired productivity
-sub-clinical disease
diagnostic:
-individuals
-sick
-confirm, classify, treat, or prognose clinical disease |
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Term
| 5 things usefulness of test depends on |
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Definition
gold standard
sensitivity
specificity
prevalence of disease
predictive values |
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Term
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Definition
propotion of population truly affected by disease
TP = (a+c)/n
[image] |
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Term
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Definition
what the prevalence "appears to be" if you see partiuclar test
AP = (a+b)/n
[image] |
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Term
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Definition
proportion of those individuals that actually have disase (according to gold standard) that actually test postive
Sn = a/(a+c)
[image] |
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Term
Flase negative propotion
Snout |
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Definition
False neg. proportion = 1 - Sn (sensitivity)
snout: if test is highly senstive, and you get a negative test result, you can be confident about ruling the disease out |
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Term
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Definition
proportion of those individuals that truly don't have the disease (according to gold standard) that test negative
Sp= d/(b+d)
[image] |
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Term
Flase postive proportion
SPIN |
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Definition
false pos. proportion = 1 - Sp (specificity)
SPIN: if test is highly specific and you get a pos. test result, you can be confident in ruling the diseaes IN |
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Term
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Definition
| probability of disease given test result |
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Term
| postive predicitive value |
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Definition
prob patient (who tested pos) actually diseassed
PPV = a/(a+b)
[image] |
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Term
| negative predictive value |
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Definition
prob patient neg with test is truly disease free
NPV= d/(c+d)
[image] |
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