[Self-esteem, coping, perceived social support and substance use in young adults with a cannabis dependence disorder]

Self-esteem, coping strategies and perceived social support play a role in the adaptive functioning of the human being: they allow the adjustment of the subject to his/her environment. These dimensions could be protective factors regarding multiple risks associated with adolescent development, and particularly substance use. Thus our objective was twofold: to evaluate self-esteem, coping strategies and perceived social support in adolescents and young adults with a cannabis dependence in comparison with subjects from the general population; to establish the correspondence between these psychological dimensions and the patients' substance use pattern.

Data from 43 young patients (36 males; mean age=19.6±3), consulting for their cannabis dependence, and 50 young adults from the general population (39 males; mean age=19.7±3.4) were included. Participants completed the Rosenberg Self-Esteem Inventory, the Social Self-Esteem Inventory of Lawson, the Coping Inventory for Stressful Situation of Endler & Parker, and the Perceived Social Support Questionnaire of Sarason. The MINI was administered to evaluate cannabis abuse or dependence; a semi-structured clinical interview was given to determine psychoactive substance use.

Between-group comparisons (two independent sample t-tests) showed that the patients had significantly lower scores on global (P=0.002) and social (P=0.035) self-esteem, task-oriented coping (P<0.001) and both availability and satisfaction regarding perceived social support (respectively P=0.029 and P<0.001). Conversely, patients had significantly higher scores on emotion-focused coping subscale (P=0.003). Logistic regressions showed that the satisfaction regarding social support and task-oriented coping scores were the more powerful to distinguish the patients from the controls (respectively β=1.16, P=0.043 and β=1.06, P=0.015). Unvaried linear regression analyses revealed a negative association between the age of first cannabis use and the avoidant-social coping score (P=0.025), and positive associations between the length of daily cannabis use and emotion-focused coping score (P=0.028), and frequency of cannabis use and global self-esteem scores (P=0.028). Moreover, polysubstance misuse is associated with low distraction-avoidant coping scores. No association was found between clinical scores and tobacco and alcohol uses variables.

These results suggest that cannabis dependent patients may present a lack in individual and interpersonal resources. This clinical study underscores the potential contribution of maladaptive coping to the development or maintenance of substance use in young adulthood.