Convert medical measurements between International Standard (SI) and US 'Conventional' Units.

Convert Medical measurements between International Standard (SI) and US 'Conventional' Units.

Keywords
manip
Usage
ConvertMedUnits(x, measurement, abbreviation,
                to = c("Conventional", "SI", "US"),
                exact = !missing(abbreviation))
Arguments
x

Vector of measurement values

measurement

Name of the measurement

abbreviation

Measurement abbreviation

to

Target units

exact

Logicial indicating whether matching should be exact

Details

Medical laboratories and practitioners in the United States use one set of units (the so-called 'Conventional' units) for reporting the results of clinical laboratory measurements, while the rest of the world uses the International Standard (SI) units. It often becomes necessary to translate between these units when participating in international collaborations.

This function converts between SI and US 'Conventional' units.

If exact=FALSE, grep will be used to do a case-insensitive sub-string search for matching measurement names. If more than one match is found, an error will be generated, along with a list of the matching entries.

Value

Returns a vector of converted values. The attribute 'units' will contain the target units converted.

References

http://www.globalrph.com/conv_si.htm

See Also

The data set MedUnits provides the conversion factors.

Aliases
  • ConvertMedUnits
Examples
data(MedUnits)

# show available conversions
MedUnits$Measurement

# Convert SI Glucose measurement to 'Conventional' units
GlucoseSI = c(5, 5.4, 5, 5.1, 5.6, 5.1, 4.9, 5.2, 5.5) # in SI Units
GlucoseUS = ConvertMedUnits( GlucoseSI, "Glucose", to="US" )
cbind(GlucoseSI,GlucoseUS)


# See what happens when there is more than one match
ConvertMedUnits( 27.5, "Creatin", to="US")


# To solve the problem do:
ConvertMedUnits( 27.5, "Creatinine", to="US", exact=TRUE)
Documentation reproduced from package gdata, version 2.18.0, License: GPL-2

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