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7 Cards in this Set
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Risk
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R= A/N = probability
R= # newly diagnosed/ population size |
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Prevalence
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P= C/N
P= # existing cases/ population size |
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Incidence Rate
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IR= A/PT =% PT
IR= # newly diagnosed/ person-time |
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How to calculate Person-time?
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the net time that each subject contributed.
time ends at diagnosis *also include those who died before diagnosis or discontinued before diagnosis |
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Survival Rate
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SR= (A-D)/A
SR= (# newly diagnosed - # deaths)/ # newly diagnosed |
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Case Fatality
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CF= D/A
CF= # deaths/ # diagnosed |
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Statistical Power
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P= 1-beta
(beta= likelihood of a type 2 error, false negative) |
