Most Australian cannabis users stay safe, but daily use and mental health concerns raise red flags

Proportions and correlates of high-risk cannabis use in Australia-A cross-sectional analysis of the 2022-2023 National Drug Strategy Household Survey.

Addiction (Abingdon, England) • • Moderately Relevant
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AI Summary

This Australian national survey examined how common high-risk cannabis use is among regular users and what factors predict it. Researchers analyzed data from over 1,500 people who reported using cannabis at least every few months, assessing their risk levels using the WHO's ASSIST-Lite screening tool. The key finding is that only 6.2% of regular cannabis users in Australia met criteria for high-risk use, suggesting that the majority of people consuming cannabis do not develop problematic patterns. However, this risk increased dramatically to 14.8% among daily users—nearly three times higher than the overall population studied.

Several important risk factors emerged from the analysis. Daily use was the strongest predictor, with daily users being 5.7 times more likely to experience high-risk use compared to weekly users. Beginning cannabis use before age 15 was also significant, doubling the likelihood of high-risk patterns compared to starting at age 18 or older. Perhaps most notably, individuals reporting psychological distress showed a 3.2-fold increased risk of developing high-risk cannabis use, suggesting a potential link between mental health and problematic consumption patterns. These findings indicate that while most Australian cannabis users maintain relatively controlled use, daily consumption patterns, early initiation, and psychological vulnerability are key warning signs that may warrant intervention or support.

The practical implication of this research is that not all cannabis use is equally risky, but certain groups—particularly young people, daily users, and those experiencing mental health challenges—may benefit from targeted education or prevention strategies. Healthcare providers could use these risk factors to identify which users might need additional support or monitoring."

📄 Original Abstract

Cannabis use is prevalent in Australia, however, limited research has explored the levels of high-risk cannabis use within nationally representative samples. This study aimed to address this gap by examining the proportion of individuals meeting criteria for high-risk cannabis use and identifying its correlates in a representative Australian dataset. Observational study using data from the 2022-2023 Australian National Drug Strategy Household Survey on respondents self-reporting cannabis use every few months or more frequently (N = 1504). The outcome variable was the past 3 month cannabis use risk, assessed using the World Health Organization's ASSIST-Lite (WHO-ASSIST-Lite). A multinomial logistic regression on cannabis risk levels (moderate and high vs low) was conducted, with cannabis use patterns, psychological distress, and sociodemographic characteristics as independent variables. An estimated 6.2% (95% confidence interval [CI]: 4.6, 7.8) of people who consume cannabis met criteria for high-risk cannabis use. Prevalence was substantially higher among individuals who used cannabis daily (14.8% [10.2, 19.3]) compared with those who used it weekly (5.5% [2.7, 8.2]; relative risk ratio (RRR) = 5.70 [3.25, 9.98], p < 0.001). Early initiation, particularly before age 15, was also associated with greater risk of high-risk use (RRR = 2.52 [1.25, 5.08], p = 0.009), compared with initiation at age 18 or older. Respondents who reported psychological distress had an increased risk of high-risk cannabis use (RRR = 3.19 [1.66, 6.11], p < 0.001). A minority proportion of Australians who consume cannabis appear to meet criteria for high-risk use. Daily use, early age of initiation, and high psychological distress may be key risk factors.

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