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Planning Volunteer Responses to Low-Volume Mass Gatherings: Do Event Characteristics Predict Patient Workload?

Published online by Cambridge University Press:  28 June 2012

John Woodall
Affiliation:
Australian Centre for Prehospital Research, Brisbane, Queensland Australia
Kerrianne Watt
Affiliation:
School of Population Health, University of Queensland, Brisbane, Queensland Australia
Damien Walker
Affiliation:
St John Australia, Brisbane, Queensland Australia
Vivienne Tippett
Affiliation:
Australian Centre for Prehospital Research, Brisbane, Queensland Australia
Emma Enraght-Moony
Affiliation:
Australian Centre for Prehospital Research, Brisbane, Queensland Australia
Chris Bertolo
Affiliation:
St John Australia, Brisbane, Queensland Australia
Brett Mildwaters
Affiliation:
St John Australia, Brisbane, Queensland Australia
Glen Morrison
Affiliation:
St John Australia, Brisbane, Queensland Australia
Corresponding
E-mail address:

Abstract

Introduction:

Workforce planning for first aid and medical coverage of mass gatherings is hampered by limited research. In particular, the characteristics and likely presentation patterns of low-volume mass gatherings of between several hundred to several thousand people are poorly described in the existing literature.

Objectives:

This study was conducted to:

1. Describe key patient and event characteristics of medical presentations at a series of mass gatherings, including events smaller than those previously described in the literature;

2. Determine whether event type and event size affect the mean number of patients presenting for treatment per event, and specifically, whether the 1:2,000 deployment rule used by St John Ambulance Australia is appropriate; and

3. Identify factors that are predictive of injury at mass gatherings.

Methods:

A retrospective, observational, case-series design was used to examine all cases treated by two Divisions of St John Ambulance (Queensland) in the greater metropolitan Brisbane region over a three-year period (01 January 2002–31 December 2004). Data were obtained from routinely collected patient treatment forms completed by St John officers at the time of treatment. Event-related data (e.g., weather, event size) were obtained from event forms designed for this study. Outcome measures include: total and average number of patient presentations for each event; event type; and event size category. Descriptive analyses were conducted using chi-square tests, and mean presentations per event and event type were investigated using Kruskal-Wallis tests. Logistic regression analyses were used to identify variables independently associated with injury presentation (compared with non-injury presentations).

Results:

Over the three-year study period, St John Ambulance officers treated 705 patients over 156 separate events. The mean number of patients who presented with any medical condition at small events (≤2,000 attendees) did not differ significantly from that of large (>2,000 attendees) events (4.44 vs. 4.67, F = 0.72, df = 1, 154, p = 0.79). Logistic regression analyses indicated that presentation with an injury compared with non-injury was independently associated with male gender, winter season, and sporting events, even after adjusting for relevant variables.

Conclusions:

In this study of low-volume mass gatherings, a similar number of patients sought medical treatment at small (<2,000 patrons) and large (>2,000 patrons) events. This demonstrates that for low-volume mass gatherings, planning based solely on anticipated event size may be flawed, and could lead to inappropriate levels of first-aid coverage. This study also highlights the importance of considering other factors, such as event type and patient characteristics, when determining appropriate first-aid resourcing for low-volume events. Additionally, identification of factors predictive of injury presentations at mass gatherings has the potential to significantly enhance the ability of event coordinators to plan effective prevention strategies and response capability for these events.

Type
Original Research
Copyright
Copyright © World Association for Disaster and Emergency Medicine 2010

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References

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