BioStats

Card Set Information

Author:
dakine619
ID:
280488
Filename:
BioStats
Updated:
2014-08-10 23:26:56
Tags:
BioStats
Folders:
BioStats
Description:
Step 2
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  1. Prob that screening test is (+) for Pt with Dz?
    • Ans: Sensitivity
    • Eq: A / (A+C)
  2. Prob that Pt w (-) test, doesn't have Dz?
    • Ans: Negative Predictive Value (NPV)
    • Eq: D / (C+D)
  3. Prob that a test will be (-) in Pt w/o Dz?
    • Ans: Specificity
    • Eq: D / (B+D)
  4. Prob that a test(+) Pt actually has the Dz?
    • Ans: Positive Predictive Value (PPV)
    • Eq: A / (A+B)
  5. 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)
  6. Describe the frequency of an event
    • Incidence:
    • Prevalence:
    • Person-years:
  7. Terms describing magnitude of an effect
    • Relative risk:
    • odds ratio:
    • Absolute risk:
    • Number needed to treat:
  8. Terms describing Quality of Meas
    • Reliability:
    • Validity:
  9. Measures of diagnostic test performance
    • Sensitivity:
    • Specificity:
    • Predictive Values:
    • Likelihood ratio:
    • Accuracy:
  10. Expressions used when making inferences about data
    • Confidence interval:
    • Credible interval:
    • Errors:
    • Powers:
  11. Study Designs
    • Cohort Study:
    • Case-Control Study:
    • Randomized controlled trial (intention to treat):
    • Mendelian randomization:

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