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5 Written questions

5 Matching questions

  1. Number Needed to Treat
  2. Number of People Living in the US with HIV.
  3. Gausian Curve
  4. External Validity
  5. Relative Risk
  1. a A general term for measures of association calculated from data in a 2x2 table. = Risk of disease in exposed (a/(a+b)) / Risk of disease in unexposed (c/(c+d))
  2. b 500,000-1,000,000
  3. c Normal distribution curve. based in statistical theory, describes the frequency distribution of repeated measurements of the same physical object by the same measurement.
  4. d The number of people needed to be treated to prevent one bad outcome
    NNT = 1/ARR
  5. e "degree to which the results of an observation hold true in other settings" "generalizability" "Assuming that the results of a study are true, do they apply to my patients as well?" p. 10

5 Multiple choice questions

  1. "the study of disease occurrence in human populations" p. 3
  2. 450,000
  3. The probability of disease after the test result is known.
  4. "purported cause or predictor variables" p. 5
  5. the proportion of persons in a defined population at a given point in time having the condition in question

5 True/False questions

  1. Cohort Study"incidence study" Sample of people either free of outcome of interest and then followed over time as it emerges, or all diseased then followed for outcomes of that disease.. p. 64, All participants in a cohort study could experience the outcome of interest. 81 See Table 5.2 p. 84 "Advantages and Disadvantages of Cohort Studies"


  2. Pretest ProbabilityThe prevalence of disease in a specified group of subjects.


  3. Attributable RiskThe absolute difference in the rate of events between the control and the intervention group. ( same as ARR)


  4. PPVProbability of disease in a patient with a positive test result PV+=true positive/(true positive + false positive) p. 39


  5. Number of People Known to be Living in Alabama with HIV500,000-1,000,000


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