It has been demonstrated that by using currently available aggregated data from general practice prescribing systems within the area covered by HoBtPCT, it is possible to develop a computerised tool to calculate individual patient Medication Possession Ratios (MPRs) for oral pharmacotherapy used in the treatment of diabetes, dyslipidaemia and hypothyroidism. The effectiveness of the developed methodology for the calculation of the MPR and its subsequent use in identifying those patients with low adherence levels to their medication was successfully validated by triangulation with both a self-reported measure of adherence via a patient questionnaire, and through the analysis of specific patient clinical values.
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