Description Usage Arguments Value References Examples
referenceVals
and testVals
are assumed to contain
paired glucose values from a reference method and a test method,
respectively. unit
contains info on the unit of measurement. Two
options exist: "gram"
for mg/dL and "mol"
for mmol/l
with "gram"
applied by default. The discrepancy between the two values
is used to place the pair into a Clarke error grid zone according to the
criteria described in the original paper by Clarke et. al. (see reference below).
1 | getClarkeZones(referenceVals, testVals, unit = "gram")
|
referenceVals |
A vector of glucose values obtained via the reference method. |
testVals |
A vector of glucose values obtained via a non-reference
method (e.g. a new meter). The values in this vector are paired with those
in |
unit |
A string specifying the units of measurement. This should be either
|
A character vector is returned, with each element being one of
"A"
, "B"
, "C"
, "D"
, or "E"
.
Clarke, W. L., D. Cox, L. A. Gonder-Frederick, W. Carter, and S. L. Pohl. "Evaluating Clinical Accuracy of Systems for Self-Monitoring of Blood Glucose." Diabetes Care 10, no. 5 (September 1, 1987): 622-28.
1 2 3 4 5 6 7 8 | zones <- getClarkeZones (glucose_data$ref / 18, glucose_data$test / 18,
unit="mol")
# counts
table(zones)
# percentages
round (table (zones) / length (zones) * 100, digits=2)
|
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