medMPRm {medAdherence}R Documentation

Medication Possession Ratio(modified)

Description

medMPRm function calculates the medication possession ratio,modified.

Medication Possession Ratio, modified (MPRm) were computed taking the ratio of the sum of days' supplies to the intervals elapsed between date of first prescription refill and last prescription refill plus the days' supply of last refill.

Same as MPR, the ratio alone can't be combined across patients due to different observation days (denomitor). MPRm may exceed 100% due to early refills and/or polypharmacy. Very commonly, if MPRm>100%, it will be truncated to 100%.

Usage

medMPRm(df=data,followUpDays=NA,truncated="yes", digits=2)

Arguments

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

Author(s)

Xiangyang Ye, Pharmacotherapy Outcomes Research Center, University of Utah

References

Vanderpoel, DR. , Hussein, MA, et al. Adherence to a Fixed-Dose Combination of Rosiglitazone Maleate/Metformin Hydrochloride in Subjects with Type 2 Diabetes Mellitus: A Retorspective Database Analysis Clinical Therapeutics 2004;26:2066-2075

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

Examples

cmos <- rxExampledt()
predt <- preRxData(df=cmos,id=ptid,rxDate=rxDay,daySupply=supplies)
medMPRm(predt)

[Package medAdherence version 1.02 Index]