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Background  While low back pain is a common presenting complaint in the emergency department, current estimates from Canada are limited. Furthermore, existing estimates do not clearly define low back pain. As such, our main objective was to estimate prevalence rates of low back pain in a large Nova Scotian emergency department using various definitions, and to describe characteristics of individuals included in these groups. An additional objective was to explore trends in low back pain prevalence in our emergency department over time.    Methods  We conducted a cross sectional analysis using six years of administrative data from our local emergency setting. We first calculated the prevalence and patient characteristics for individuals presenting with any complaint of back pain, and for groups diagnosed with different types of low back pain. We explored prevalence over time by analyzing presentation trends by month, day of the week and hour of the day.    Results  The prevalence of patients presenting to the emergency department with a complaint of back pain was 3.17%. Individuals diagnosed with non-specific/mechanical low back pain with no potential nerve root involvement made up 60.8% of all back pain presentations. Persons diagnosed with non-specific/mechanical low back pain with potential nerve root involvement made up 6.7% of presentation and the low back pain attributed to secondary factors accounted for 9.9% of back pain presentations. We found a linear increase in presentations for low back pain over the study period.    Conclusion  This is the first multi-year analysis assessing the prevalence of low back pain in a Canadian emergency department. Back pain is a common presenting complaint in our local emergency department, with most of these persons receiving a diagnosis of non-specific/mechanical low back pain with no potential nerve root involvement. Future research should concentrate on understanding the management of low back pain in this setting, to ensure this is the proper setting to manage this common condition.    Electronic supplementary material  The online version of this article (10.1186/s12891-018-2237-x) contains supplementary material, which is available to authorized users.

bmc musculoskeletal disorders

The prevalence of low back pain in the emergency department: a descriptive study set in the Charles V. Keating Emergency and Trauma Centre, Halifax, Nova Scotia, Canada