pv.wgs {DTComPair} R Documentation

## Weighted Generalized Score Statistic for Comparison of Predictive Values

### Description

Performs a test for differences in (positive and negative) predictive values of two binary diagnostic tests using a weighted generalized score statistic proposed by Kosinski (2013).

### Usage

pv.wgs(tab)


### Arguments

 tab An object of class tab.paired.

### Value

A list containing:

 ppv A list with test1 (the positive predictive value of test 1), test2 (the positive predictive value of test 2), diff (the difference in positive predictive values, computed as test2 - test1, the test.statistic and the corresponding p.value. npv A list with test1 (the negative predictive value of test 1), test2 (the negative predictive value of test 2), diff (the difference in negative predictive values, computed as test2 - test1, the test.statistic and the corresponding p.value. method The name of the method used to compare predictive values, here “weighted generalized score statistic (wgs)”.

### References

Kosinski, A.S. (2013). A weighted generalized score statistic for comparison of predictive values of diagnostic tests. Stat Med, 32(6):964-77.

pv.gs and pv.rpv.

### Examples

data(Paired1) # Hypothetical study data
ftable(Paired1)
paired.layout <- tab.paired(d=d, y1=y1, y2=y2, data=Paired1)
paired.layout
wgs.results <- pv.wgs(paired.layout)
str(wgs.results)
wgs.results
wgs.results\$ppv["p.value"]


[Package DTComPair version 1.0.3 Index]