The aim is to extract a C and M stage (Prague score) for Barrett's samples. This is done using a regex where C and M stages are explicitly mentioned in the free text Specfically it extracts the Prague score
See also
Other Disease Specific Analysis - Barretts Data:
BarrettsAll(),
BarrettsBxQual(),
BarrettsParisEMR(),
Barretts_FUType(),
Barretts_PathStage()
Examples
# The example takes the endoscopy demo dataset and searches the
# Findings column (which contains endoscopy free text about the
# procedure itself). It then extracts the Prague score if relevant. I
# find it easiest to use this on a Barrett's subset of data rather than
# a dump of all endoscopies but of course this is a permissible dataset
# too
aa <- Barretts_PragueScore(Myendo, "Findings", "OGDReportWhole")