Smoking Mostly Alone as a Risk Factor for Cannabis Use Disorders and Depressive Symptoms

Area of Science:

• Psychology
• Public Health
• Addiction Medicine

Background:

• Etiological models of cannabis use often focus on individual psychological factors.
• Interpersonal and relational variables influencing excessive cannabis use are less understood.
• The impact of consumption context on cannabis use intensity in youth needs clarification.

Purpose of the Study:

• To evaluate how smoking cannabis mostly alone modulates cannabis use disorders (CUD) and depressive symptoms in college students.
• To investigate the relationship between smoking context and CUD and depressive symptoms.

Main Methods:

• A sample of 854 college students in France who used cannabis in the last 6 months completed self-report questionnaires.
• Data collected included cannabis consumption, CUD symptoms, and depressive symptoms.
• Statistical analyses were performed to examine correlations and mediation effects.

Main Results:

• Students who primarily smoked cannabis alone reported higher current use frequency, increased CUD symptoms, and greater depressive symptoms compared to those who smoked mostly socially.
• Smoking alone remained positively correlated with CUD and depressive symptoms, even after controlling for current use frequency.
• CUD symptoms mediated the relationship between smoking alone and depressive symptoms.

Conclusions:

• Smoking cannabis alone is a risk factor for uncontrolled cannabis use and may promote the link between cannabis use and depressive disorders.
• Loneliness and social isolation may underlie the association between smoking alone and negative mental health outcomes.
• Longitudinal studies are needed to establish causal mechanisms.