pharmcoeconomics calcs

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Author:
capnhue
ID:
279059
Filename:
pharmcoeconomics calcs
Updated:
2014-07-16 12:37:46
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pharmcoeconomics calcs
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pharmcoeconomics calcs
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  1. Relative Risk (RR)
    • RR = a / (a+b)
    •         c / (c+d)
    • RR = 1: no difference between groups
    • RR < 1:less likely to occur in treatment group 
    • RR > 1:more likely to occur in treatment group
  2. Relative Risk Reduction (RRR)
    RRR = 1 - RR

    OR

    • RRR = (% risk in control - % risk in treatment)
    •                       % risk in control
  3. Absolute Risk Reduction (ARR)
    ARR = % risk in control - % risk in treatment
  4. Number Needed to Treat (NNT)
    NNT = 1 / ARR

    OR

    NNT = 1 / (% risk in control - % risk in treatment)
  5. Odds Ratio (OR)
    OR = ad / bc
  6. Hazard Ratio (HR)
    HR = hazard treatment arm / hazard control arm
  7. nominal data
    • consists of categories: ex; gender, ethnicity
    • * numbers have no true numerical value, ex; male - 1, female - 2
  8. ordinal data
    ranked categories: like NYHA scale, or pain scale
  9. continuous data
    • infinite number of possible values, ex; height, weight, A1C, blood pressure
    • interval data: difference between 2 values, ex; celsius temp
    • ratio data: height, weight, time, length

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