P135: Frequent emergency department use as an independent factor associated with mortality in substance and opioid misuse: a retrospective analysis of linked databases

Introduction: Substance and opioid misuse present significant illness burdens in Emergency Departments (EDs). Understanding risk factors for mortality in these patients is urgently needed to allow targeted prevention. This studys objective was to determine whether frequent ED use is independently associated with mortality among patients with substance and opioid misuse, and secondarily, whether degree of frequent use influences mortality risk....