Term
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Definition
Se=TP/(TP+FN)
Se: Sensitivity
TP: True Positives
FN: False Negatives |
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Term
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Definition
Sp=TN/(TN+FP)
Sp: Specificity
TN: True Negatives
FP: False Positives |
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Term
| Positive Predictive Value |
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Definition
PPV= TP/(TP+FP)
PPV: Positive Predictive Value
TP: True Positive
FP: False Positive |
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Term
| Negative Predictive Value |
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Definition
NPV= TN/(TN+FN)
NPV: Negative Predictive Value
TN: True Negative
FN: False Negative |
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Term
| Post-test Probablity after a negative result |
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Definition
PtP=1-NPV
PtP: Post-test Probability
NPV: Negative Predictive Value |
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Term
| Attributable Risk(Risk Difference) |
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Definition
AR= IE-INE
AR: Attributable Risk
IE: Incidence in Exposed Animals
INE: Incidence in Nonexposed Animals |
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Term
| Relative Risk(Risk Ratio) |
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Definition
RR=IE/INE
RR: Relative Risk
IE: Incidence in Exposed Animals
INE: Incidence in Nonexposed Animals |
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Term
| Population Attributable Risk |
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Definition
ARP=AR x PEXP
ARP: Population Attributable Risk
AR: Attributable Risk
PEXP:Proportion of the Population Exposed to Risk Factor |
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Term
| Population Attributable Fraction(Proportion) |
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Definition
AFP=ARP/(PEXPx IE + (1-PEXP) x INE)
AFP: Population Attributable Fraction
ARP: Population Attributable Risk
PEXP:Proportion of the Population Exposed to Risk Factor
IE: Incidence in Exposed Animals
INE: Incidence in Nonexposed Animals |
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