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Trends in Canadian Cannabis Consumption Over Time: A Two-step Meta-analysis of Canadian Household Survey Data

<imgsrc=”” border=”0″ align=”left” alt=”image”>Aims:

To estimate temporal trends in cannabis consumption in the Canadian household population using national survey data and map changes in cannabis consumption postlegalization in 2018.

Methods:

In a 2-step meta-analysis approach, we first analyzed each survey year separately by estimating the weighted past-year prevalence (%) of self-reported cannabis use (including just once) with its 95% confidence intervals (CIs). In the next step, to produce aggregate data for each survey year, we pooled prevalences using the DerSimonian and Laird random-effects (determined a priori) meta-analysis model packages in R to estimate the between-study variance (τ2) for the inverse variance method, and the Freeman-Tukey Double arcsine transformation.

Results:

In total, 29 Statistics Canada survey iterations met eligibility for inclusion in the meta-analysis. Reported past-year prevalences for cannabis use ranged from 4.2% in 1993 to 27% in 2021. The overall prevalence of past-year cannabis use was 11.4% (95% CI, 9.7%–13.3%; 22 surveys; 53,712/474,888 participants; I2=99.8%; τ2=0.0048). There was a significant increase in cannabis past-year prevalence in subgroup meta-analyses (P

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Posted in: Meta-analyses - Systematic Reviews on 01/03/2023 | Link to this post on IFP |
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