Extracts the first test only per patient

Source: R/EndoMineR.R

Extracts the first test only per patient and returns a new dataframe listing the patientID and the first test done

SurveilFirstTest(dataframe, HospNum_Id, Endo_ResultPerformed)

Arguments

dataframe

dataframe
HospNum_Id

Patient ID
Endo_ResultPerformed

Date of the Endoscopy

See also

Other Basic Analysis - Surveillance Functions: HowManyOverTime(), SurveilLastTest(), SurveilTimeByRow(), TimeToStatus()

Examples

dd <- SurveilFirstTest(
  Myendo, "HospitalNumber",
  "Dateofprocedure"
)