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5 Cards in this Set
- Front
- Back
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formula for attributable risk
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AR
= ((RR - 1) / RR ) * 100 = R(exp) - R(unex) = A/(A+B) - C/(C+D) |
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formula for odds ratio
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OR
= (A/(A+B)) / (C/(C+D)) |
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Formula for population at risk
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PAR
= AR X Prev PAR% = (R(tx) - R(untx)) / (R(tx)) X 100 |
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Formula for NNT
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NNT
= 1 / (ARR) |
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Formula for Absolute Risk Reduction
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ARR
= R1 -R2 (also known as risk difference) |
