medMPR {medAdherence} | R Documentation |
medMPR
function calculates the medication possession ratio.
Medication Possession Ratio (MPR) were computed taking the ratio of the sum of days'
supplies to number of days in study (important: the first day in study is not necessary a
prescription refill date).
The ratio alone can't be combined across patients due to different observation days (denomitor). MPR may exceed 100% due to early refills and/or polypharmacy. Very commonly, if MPR>100%, it will be truncated to 100%.
medMPR(df=data,followUpDays=NA,truncated="yes", digits=2)
df |
a dataframe created by preData funtion |
followUpDays |
days of follow up |
truncated |
limit MPR to 100% or not. "yes" is the default |
digits |
round to decimals. Default is 2 |
Xiangyang Ye, Pharmacotherapy Outcomes Research Center, University of Utah
Skaer TL, Sclar DA, et al. Effect of Pharmaceutical Formulation for Diltiazem on Health Care Expenditures fo Hypertension Clinical Therapeutics 1993;15:905-911
Hess, LM, Raebel, MA, et al. Measurement of Adherence in Pharmacy Administrative Databases: A Proposal for Statndard Definitions and Preferred Measures The Annals of Pharmacotherapy 2006;40:1280-1288
cmos <- rxExampledt() predt <- preRxData(df=cmos,id=ptid,rxDate=rxDay,daySupply=supplies) medMPR(predt)