Abstract
This study aimed to investigate the interactive influence of problematic cannabis use on the relation between sleep quality and posttraumatic stress symptoms (PTSS). Hypotheses were tested cross-sectionally among 151 medical cannabis users with PTSS. Consistent with hypotheses, we found sleep quality to be associated with PTSS severity. In addition, results indicated a significant interaction such that individuals with poor sleep quality and problematic cannabis use had the highest PTSS severity (particularly hyperarousal symptoms). Results suggest that medical cannabis users with the greatest risk of severe PTSS may be those with a combination of poor sleep quality and problematic cannabis use.
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