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  5. Demography And Epidemiology Of Ageing And Migration In The EU (EPH2021)

Summary

Summary EPH2021 Formula Sheet
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  • Course
  • Demography And Epidemiology Of Ageing And Migration In The EU (EPH2021)
  • Institution
  • Maastricht University (UM)

All formulas needed in EPH2021 Demography and Epidemiology of Ageing and Migration in the EU for calculating measures of association (OR, RR, AR, AP), measures of diagnostic accuracy (Sn, Sp, PPV, NPV, Prevalence), and reliability (Cohen's Kappa)

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Document information

  • October 20, 2021
  • 2
  • 2021/2022
  • Summary

Subjects

  • epidemiology
  • formula
  • statistics
  • association
  • relative risk
  • odds ratio
  • attributable risk
  • crosstable
  • accuracy
  • reliability
  • rr
  • or
  • ar
  • cohens kappa

Written for

  • Maastricht University (UM)
  • European Public Health
  • Demography And Epidemiology Of Ageing And Migration In The EU (EPH2021)
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Content preview

EPH2021 Formula sheet exam (page 1/2)


Measures of association

Two by two table
Cases Non-cases
Exposed a b
Non-exposed c d

Odds ratio (OR)
Exposure odds cases (a/(a+c))/(c/(a+c)) a/c a*d
OR = = = =
Exposure odds non-cases (b/(b+d))/(d/(b+d)) b/d b*c

Relative risk (RR)
I exposed a/(a+b) I: Incidence
RR = =
I non-exposed c/(c+d)

Attributable risk (AR)
AR = I exp – I non-exp
= (a/(a+b)) – (c/(c+d))

Attributable proportion (AP) among the exposed
I exp – I non-exp (a/(a+b)) – (c/(c+d))
AP exp = =
I exp (a/(a+b))

AP exp = (RR – 1)/RR

Attributable proportion (AP) in the total population
I tot – I non-exp ((a+c)/N) – (c/(c+d)) N=a+b+c+d
AP tot = =
I tot (a+c)/N

AP tot = (p(RR-1)) / (p(RR-1) +1) p: proportion of exposed individuals




See next page for formulas of measures of diagnostic accuracy and reliability

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