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Table 4 Subgroup analysis: Estimates of association between cannabis legalization and urine cannabis drug screen results (n = 199)

From: Cannabis use in patients treated for opioid use disorder pre- and post-recreational cannabis legalization in Canada

Urine drug screen resultsa Pre-legalization statistic Post-legalization statistic Estimate of association with cannabis legalization 95% CI p
Cannabis user n = 139 (69.9%) n = 135 (67.8%) OR = 1.67 0.93, 2.99 0.087
Percentage of cannabis-metabolite-positive drug screens Median = 75
IQR = 100
Median = 71.4
IQR = 100
OR = 1.00 0.99, 1.01 0.638
  1. Subgroup analysis: Estimates of association between cannabis legalization and urine cannabis drug screen results
  2. CI confidence interval, OR odds ratio, IQR interquartile range
  3. aUrine drug screens for cannabis-metabolites were available for a subgroup of participants who were recruited pre-legalization (n = 199). Pre-legalization drug screens were assessed for up to 12 months before study entry, and post-legalization drug screens were assessed for 6 to 12 months post-study entry, ensuring that these results were from the post-legalization period