Determinants of trends in prescription opioid use in British Columbia, Canada, 2005–2013
K Smolina, E Gladstone… - … and drug safety, 2016 - Wiley Online Library
Pharmacoepidemiology and drug safety, 2016•Wiley Online Library
Purpose To explore the determinants of total opioid consumption in a Canadian province,
and to examine patterns of opioid dispensations by sex, age, and income quintile. Methods
We used population‐based administrative data on prescription drug dispensations in British
Columbia (BC; population~ 4 million). We apply an index‐based approach to examine how
changes in population exposure, type of opioids used, and intensity of use contributed to
changes in total morphine equivalents dispensed per 1000 population. Results Between …
and to examine patterns of opioid dispensations by sex, age, and income quintile. Methods
We used population‐based administrative data on prescription drug dispensations in British
Columbia (BC; population~ 4 million). We apply an index‐based approach to examine how
changes in population exposure, type of opioids used, and intensity of use contributed to
changes in total morphine equivalents dispensed per 1000 population. Results Between …
Purpose
To explore the determinants of total opioid consumption in a Canadian province, and to examine patterns of opioid dispensations by sex, age, and income quintile.
Methods
We used population‐based administrative data on prescription drug dispensations in British Columbia (BC; population ~4 million). We apply an index‐based approach to examine how changes in population exposure, type of opioids used, and intensity of use contributed to changes in total morphine equivalents dispensed per 1000 population.
Results
Between 2005 and 2013 in BC, opioid consumption increased by 31%, driven by longer duration of opioid therapy and by an increase in the use of stronger opioids. Consumption increased for oxycodone, hydromorphone, fentanyl, and tramadol; and declined for morphine, codeine, and other opioids. While we did not find large sex and age differences, the total level of opioid consumption was three times as high among individuals in the lowest income quintile compared to those in the highest income quintile.
Conclusions
Our findings on changes in the type of opioids used and changes in intensity of use suggest that modifications to clinical management of patients on opioid therapy may be warranted. Similar drug utilization statistics, derived from drug information systems, can be reproduced in other jurisdictions to enable a better understanding of the opioid crisis. Copyright © 2016 John Wiley & Sons, Ltd.
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