addLastDose | R Documentation |
Add lastdose data to data set from the buildDose
process.
addLastDose(buildData, lastdoseData)
buildData |
data.frame, output of |
lastdoseData |
data.frame with columns filename, ld_start, lastdose, raw_time, time_type |
Lastdose is a datetime string associated with dose data. Information on time
of last dose can be extracted within the extractMed
function
(i.e., medExtractR
) using the argument
lastdose=TRUE
. Raw extracted times should first be processed using the
processLastDose
function to convert to datetime format before providing
to addLastDose
. This function then combines the processed last dose times with output
from the buildDose
process by file name to pair last dose times with dosing regimens based on position.
Alternatively, the user can provide their own table of lastdose data. In this case, with position
information absent, the lastdose data should be restricted to one unique last dose time per
unique patient ID-date identifier.
In the case where lastdoseData
is output from processLastDose
, it is possible to
have more than one extracted last dose time. In this case, rules are applied to determine which
time should be kept. First, we give preference to an explicit time expression (e.g., "10:30pm")
over a duration expression (e.g., "14 hour level"). Then, we pair last dose times with drug regimens
based on minimum distance between last dose time start position and drug name start position.
See EHR Vignette for Extract-Med and Pro-Med-NLP for details.
a data.frame with the ‘lastdose’ column added.
# Get build data data(tac_mxr_parsed) # don't combine lastdose at this stage tac_build <- buildDose(tac_mxr_parsed, preserve = 'lastdose') # Get processed last dose data tac_mxr <- read.csv(system.file("examples", "tac_mxr.csv", package = "EHR")) data(tac_metadata) data(tac_lab) ld_data <- processLastDose(tac_mxr, tac_metadata, tac_lab) addLastDose(tac_build, ld_data)
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