Why the study?
What is the adherence rate to glaucoma medications as measured by pharmacy claims data?
What is the adherence rate to glaucoma medications as measured by pharmacy claims data?
Pharmacy claims data reveal that adherence to glaucoma medications is poor, highlighting the utility of the Medication Possession Ratio (MPR) as a robust measure of adherence over time.
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Encourages adherence monitoring with MPR in glaucoma; extends chronic disease patterns but leaves optimal interventions open.
Large pharmacy databases offer insight into medication usage but are vulnerable to errors from sampling (since patients who receive samples will be considered to have poor adherence), misidentification of newly treated patients, and misclassification of added versus switched medications. That a large proportion of patients stop and restart medications makes MPR a robust measure of adherence over time that reflects the resumption of medication after a gap in adherence. The data confirm that adherence to treatment with glaucoma medications is poor, similar to adherence in patients with other chronic diseases.
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Friedman et al. (2007) studied this question.
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