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. 2022 Mar 25;13:869162. doi: 10.3389/fphar.2022.869162

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Copyright © 2022 Serhal, Armour, Billot, Krass, Emmerton, Saini, Bosnic-Anticevich, Bereznicki, Bereznicki, Shan and Campain.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Proportion of Days Covered (PDC) Density curves for (A) total cohort (n = 289), (B) single-pharmacy users (n = 195) and (C) multiple-pharmacy users (n = 94). Vertical lines are representative of mean PDC for each data source. These distribution plots illustrate the consistently larger PDC estimates calculated via claims records and the relative closeness in PDC estimates between the claim’s records and the combined claims records and pharmacy dispensing data.