Why the lower 95% confidence limit of PPV is 0.00 for calculating by the "epiR "package in a diagnosis test ?

General
2

Hello Dennis

You're correct, it's a rounding issue. Two options. Firstly, in the latest version of epiR (2.0.46) there's an argument 'digits' which allows you to change the number of digits in the printed output for epi.tests. So use something like:

epi.tests(c(1,13,1,28), method = "exact", digits = 3, conf.level = 0.95)

Second option is to ask for summary on a named epi.tests object. For example:

rval <- epi.tests(c(1,13,1,28), method = "exact", digits = 3, conf.level = 0.95)
summary(rval)

Hope that helps.

Mark Stevenson

1 Like