Correlations between Changes in Medical Opioid Dispensing and Contributions of Fentanyl to Opioid-Related Overdose Fatalities: Exploratory Analyses from Canada.

The Pearson’s product moment correlation between (i) the provincial changes in opioid dispensing (2011–2018) and the average percentage of fentanyl of the opioid-related fatality total (2016–2019) was −0.70 ( t = 2.75, df = 8, p = 0.03); the corresponding correlation between (ii) the province-based changes in opioid dispensing (peak year to 2018) and the average percentage of fentanyl of the opioid-related fatality total (2016–2019) was −0.59 ( t = −2.06, df = 8, p = 0.07), indicating significant and near-significant results, respectively (see Figure 2 for corresponding scatterplots). 4.

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