NNTbiomarker: NNT.to.pv – R documentation

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NNT.to.pv

Convert between (NNTpos, NNTneg) and (PPV, NPV).

NNT.to.pv(NNTpos, NNTneg, NNT, prev, calculate.se.sp = F)

`NNTpos`	NNT for a patient with positive test result
`NNTneg`	NNT for a patient with negative test result
`NNT`	A matrix or vector of (NNTpos, NNTneg) values.
`prev`	Prevalence of the "BestToTreat" group before testing.
`calculate.se.sp`	(default=FALSE) If TRUE, also calculate the sensitivity and specificity using the contra-Bayes theorem.

For matrix input, cbind(ppv=ppv, npv=npv). For vector input, c(ppv=ppv, npv=npv).

Calculate Design Parameters for Biomarker Validation Studies

v0.29.11

GPL-3

Authors

Roger Day

Initial release

2015-08-20