medDBR {medAdherence}R Documentation

Days Between Refills adherence rate

Description

medDBR function calculates the Days Between Reills adherence rate.

Days Between Refills (DBR) adherence rate was estimated by comparing patients' monthly pharmacy refill records to the prescribed regimen documented in their medical records. An assumption was made that any extra doses accumulated during the study period were used as needed by the patients in order to adhere to the prescribed therapy if medication refills were not obtained on time.

The formula is: Adherence Rate = (1-(Days Between Refills - Total Days' Supply)/(Days Between Refills)) x 100.

Usage

medDBR(df=data,followUpDays=NA)

Arguments

df a dataframe created by preData funtion
followUpDays days of follow up. If no follow up days provided, the elapsed interval from the first dispensation date to last dispensation date will be used.

Author(s)

Xiangyang Ye, Pharmacotherapy Outcomes Research Center, University of Utah

References

Chisholm MA, Molly LL, et al. Comparing Renal Transplant Patients' Adherence to Free Cyclosporine and Free Tacrolimus Immunosuppressant Therapy. Clinical Transplant 2005;19:77-82

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

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

[Package medAdherence version 1.01 Index]