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Prob that screening test is (+) for Pt with Dz?
Ans
: Sensitivity
Eq
: A / (A+C)
Prob that Pt w (-) test, doesn't have Dz?
Ans
: Negative Predictive Value (NPV)
Eq
: D / (C+D)
Prob that a test will be (-) in Pt w/o Dz?
Ans
: Specificity
Eq
: D / (B+D)
Prob that a test(+) Pt actually has the Dz?
Ans
: Positive Predictive Value (PPV)
Eq
: A / (A+B)
What are the odds of exposure among Pts w a Dz, Vs, odds of exposure among Pt w/o Dz?
Ans
: Odds Ratio (OR)
unique
: Determined through case-control studies
Eq
: (A/C)/(B/D)
or
(A*D)/(B*C)
Describe the frequency of an event
Incidence:
Prevalence:
Person-years:
Terms describing magnitude of an effect
Relative risk:
odds ratio:
Absolute risk:
Number needed to treat:
Terms describing Quality of Meas
Reliability:
Validity:
Measures of diagnostic test performance
Sensitivity:
Specificity:
Predictive Values:
Likelihood ratio:
Accuracy:
Expressions used when making inferences about data
Confidence interval:
Credible interval:
Errors:
Powers:
Study Designs
Cohort Study:
Case-Control Study:
Randomized controlled trial (intention to treat):
Mendelian randomization:
Author
dakine619
ID
280488
Card Set
BioStats
Description
Step 2
Updated
2014-08-11T03:26:56Z
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