Medical adherence was measured using methods such as medication possession ratio (MPR) and proportion of days covered (PDC) to create an adherence score, which was then used to classify patients as adherent, if they scored 80% or higher for either score, or nonadherent.
Við mat á meðferðarheldni sjúklinga voru notaðar ýmsar reikniaðferðir, þær algengustu voru MPR (e. Medication Possession Ratio) og PDC (e. Proportion of Days Covered). Þá var meðferðarheldni skoðuð og mörkuð við 80% þar sem ≥ 80% táknaði góða meðferðarheldni.