• Emerg Med Australas · Feb 2004

    Pilot study of metropolitan emergency department workload complexity.

    • Peter Sprivulis.
    • Acute Demand Management Unit, State Health Emergency Services, Health Department of Western Australia, Fremantle, Australia. peter.sprivulis@health.wa.gov.au
    • Emerg Med Australas. 2004 Feb 1; 16 (1): 59-64.

    ObjectiveAssessment of emergency department (ED) patient complexity using the number of procedures, investigations or consultations (PICsum).MethodsRetrospective analysis of 12 months of data from an adult metropolitan teaching hospital ED.ResultsA bimodal distribution of PICsum (modal peaks, PICsum 1 and 7) was observed in all Australasian Triage Scale, disposition, mode of arrival, age and referral source groups. Patients requiring a minimum of two procedures or a minimum of two investigations or a minimum of two consultations (Min2 patients) comprised 59% (95% CI 58.5-59.5) of total patients 93% (95% CI 92.5-93.8) of total PICsum. Age is highly correlated with Mean PICsum (Pearson r = 0.98, P < 0.001) and the proportion of Min2 patients (Pearson r = 0.98, P < 0.001).ConclusionsAn intuitive partition in the complexity distribution is identified at up to one procedure, one investigation and one consultation. Patient age is correlated with complexity and ED age distribution may be a useful proxy for complexity, particularly if used in conjunction with validated age versus complexity tables.

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