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Patients presenting to an emergency department (ED) with painful conditions continue to experience significant delay to analgesia. It remains unclear whether demographic and clinical factors are associated with this outcome. The objectives of this study were to determine 1) the proportion of patients that require parenteral opiate analgesia for pain in an ED and who receive the opiate in less than 60 minutes; and 2) whether any factors are predictive for the first dose of analgesia being delayed beyond 60 minutes. A retrospective cohort study with descriptive and comparative data analysis was conducted. Over a 3-month period, the medical record of every patient receiving parenteral opiates in a tertiary emergency department was reviewed and analyzed. Of 857 patients, 451 (52.6%) received analgesia in less then 60 minutes. Multiple demographic and clinical factors are associated with statistically significant …