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MethComp (version 1.30.0)

Analysis of Agreement in Method Comparison Studies

Description

Methods (standard and advanced) for analysis of agreement between measurement methods. These cover Bland-Altman plots, Deming regression, Lin's Total deviation index, and difference-on-average regression. See Carstensen B. (2010) "Comparing Clinical Measurement Methods: A Practical Guide (Statistics in Practice)" for more information.

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Version

Install

install.packages('MethComp')

Monthly Downloads

414

Version

1.30.0

License

GPL (>= 2)

Maintainer

Last Published

January 19th, 2020

Functions in MethComp (1.30.0)

DA2y

Convert DA to (classical) regression
VitCap

Merits of two instruments designed to measure certain aspects of human lung function (Vital Capacity)
PBreg

Passing-Bablok regression
TDI

Compute Lin's Total deviation index
abconv

Derive linear conversion coefficients from a set of indeterminate coefficients
Meth.sim

Simulate a dataframe containing replicate measurements on the same items using different methods.
cardiac

Measurement of cardiac output by two different methods.
bothlines

Add regression lines to a plot
PEFR

Peak Expiratory Flow Rate (PEFR) measurements with Wright peak flow and mini Wright peak flow meter.
MethComp

Summarize conversion equations and prediction intervals between methods.
check.trans

Functions to handle transformations of measurement results.
choose.trans

Functions to handle transformations of measurement results.
to.long

Functions to convert between long and wide representations of data
print.MCmcmc

Print a MCmcmc object
glucose

Glucose measurements by different methods
hba.MC

A MCmcmc object from the hba1c data
rainman

Perception of points in a swarm
summary.MCmcmc

Summary
ends

Function to identify the extremes of a vector
fat

Measurements of subcutaneous and visceral fat
perm.repl

Manipulate the replicate numbering within (item,method)
corr.measures

Classical association measures
milk

Measurement of fat content of human milk by two different methods.
pairs.MCmcmc

Create a pairs plot for an MCmcmc object
subset.MCmcmc

Subset an MCmcmc object
ox

Measurement of oxygen saturation in blood
hba1c

Measurements of HbA1c from Steno Diabetes Center
summary.Meth

Summary for Meth obect
middle

Function to identify the middle of a vector
plot.MethComp

Summarize conversion equations and prediction intervals between methods.
BA.plot

Bland-Altman plot of differences versus averages.
ox.MC

A MCmcmc object from the oximetry data.
plvol

Measurements of plasma volume measured by two different methods.
sample.Meth

Sample Meth object with replacement
predict.PBreg

Predict results from PBreg object
scint

Relative renal function by Scintigraphy
sbp

Systolic blood pressure measured by three different methods.
sbp.MC

A MCmcmc object from the sbp data
plot.MCmcmc

Plot estimated conversion lines and formulae.
y2DA

Convert DA to (classical) regression
trace.MCmcmc

Functions to graphically assess the convergence of the MCMC-simulation in a MCmcmc object
to.wide

Functions to convert between long and wide representations of data
CardOutput

Measurements of Cardiac output.
Ancona

Data from a rating experiment of recorgnizing point counts.
Enzyme

Enzyme activity data
DA.reg

Make a regression of differences on averages
AltReg

Estimate in a method comparison model with replicates
BA.est

Bias and variance components for a Bland-Altman plot.
MCmcmc

Fit a model for method comparison studies using WinBUGS
Deming

Regression with errors in both variables (Deming regression)
Meth

Create a Meth object representing a method comparison study