Mass gathering medicine: a review

Epidemiology of Hajj pilgrimage mortality: Analysis for potential intervention

BACKGROUND

The Saudi Vision 2030 predicts the attendance of 30 million pilgrims each year by 2030. Cost-effective healthcare services during the Hajj are important to manage this increase in the number of pilgrims. Little is known about the impact of the existing chronic diseases on morbidity and mortality during the Hajj. Furthermore, the quality of services provided by Hajj hospitals warrants further study. This study aims to describe patterns of inpatient, all-cause mortality during the Hajj and the relationship between mortality and preexisting chronic diseases as well as the services provided in Hajj hospitals.

METHODS

The population included pilgrims who were admitted to Hajj hospitals in Makkah and sacred sites between 2012 and 2017, excluding 2015. A retrospective, matched, case-control study design was utilized. 2237 cases of mortality were matched to 4474 control cases based on age and gender. The data were extracted from hospital admissions offices and medical records. Hierarchical, logistic regression models were used to examine the medical services. The effect measure modification of the copresence of more than one chronic disease was also examined.

RESULTS

The rate of inpatient all-cause mortality was higher in Makkah hospitals compared to sacred site hospitals. Inpatient, all-cause mortality was significantly associated with diabetes, hypertension, and cardiovascular diseases. Effect measure modification was present between diabetes and cardiovascular diseases, hypertension, and cardiovascular diseases, but not between diabetes and hypertension. Patients who received medical services were more likely to die during their hospital stay compared to patients not receiving services.

CONCLUSION

The current focus on public health issues during the Hajj should be equally distributed between communicable and non-communicable diseases. Although advanced services are provided by Hajj hospitals, interventions to address the increased risks, including mortality, faced by pilgrims with preexisting, chronic diseases should be further investigated and considered.

Quantitative Metrics in Mass-Gathering Studies: A Comprehensive Systematic Review

INTRODUCTION

Mass gatherings are events where many people come together at a specific location for a specific purpose, such as concerts, sports events, or religious gatherings, within a certain period of time. In mass-gathering studies, many rates and ratios are used to assess the demand for medical resources. Understanding such metrics is crucial for effective planning and intervention efforts. Therefore, this systematic review aims to investigate the usage of rates and ratios reported in mass-gathering studies.

METHODS

In this systematic review, the PRISMA guidelines were followed. Articles published through December 2023 were searched on Web of Science, Scopus, Cochrane, and PubMed using the specified keywords. Subsequently, articles were screened based on titles, abstracts, and full texts to determine their eligibility for inclusion in the study. Finally, the articles that were related to the study's aim were evaluated.

RESULTS

Out of 745 articles screened, 55 were deemed relevant for inclusion in the study. These included 45 original research articles, three special reports, three case presentations, two brief reports, one short paper, and one field report. A total of 15 metrics were identified, which were subsequently classified into three categories: assessment of population density, assessment of in-event health services, and assessment of out-of-event health services.

CONCLUSION

The findings of this study revealed notable inconsistencies in the reporting of rates and ratios in mass-gathering studies. To address these inconsistencies and to standardize the information reported in mass-gathering studies, a Metrics and Essential Ratios for Gathering Events (MERGE) table was proposed. Future research should promote consistency in terminology and adopt standardized methods for presenting rates and ratios. This would not only enhance comparability but would also contribute to a more nuanced understanding of the dynamics associated with mass gatherings.

How the Italian Formula 1 Grand Prix 2022 Mass Gathering Event Compares to the Arbon Model: A Descriptive Study

OBJECTIVE

To describe the health-care resources implemented during the Italian Formula 1 Grand Prix (F1GP) and to calculate the patient presentation rate (PPR) based on both real data and a prediction model.

METHODS

Observational and descriptive study conducted from September 9 to September 11, 2022, during the Italian F1GP hosted in Monza (Italy). Maurer's formula was applied to decide the number and type of health resources to be allocated. Patient presentation rate (PPR) was computed based on real data (PPR_real) and based on the Arbon formula (PPR_est).

RESULTS

Of 336,000 attendees, n = 263 requested medical assistance with most of them receiving treatment at the advanced medical post, and n = 16 needing transport to the hospital. The PPR_real was 51 for Friday, 78 for Saturday, 134 for Sunday, and 263 when considering the whole event as a single event. The PPR_est resulted in 85 for Friday, 93 for Saturday, 97 for Sunday, and 221 for the total population.

CONCLUSIONS

A careful organization of health-care resources could mitigate the impact of the Italian F1GP on local hospital facilities. The Arbon formula is an acceptable model to predict and estimate the number of patients requesting medical assistance, but further investigation needs to be conducted to implement the model and tailor it to broader categories of MGE.

MEDICAL PLANNING FOR MASS GATHERING SPORTS EVENTS IN BRAZIL

ABSTRACT Introduction: Medical planning for mass gathering events is founded on the structuring of assistance to the population involved and the preservation of the response capacities of the local healthcare system. Large sporting events attended by crowds are increasingly common in society. These events have been shown to be dangerous, generating higher incidences of injuries and illnesses than usual. Thus, planning and the interaction among various public and private sectors are required for the prevention of and response to emergencies and incidents involving multiple victims. Methods: Recently published studies on medical planning for large sports events and current federal agency legislation were selected to conduct an updated review on the subject. Results: After reading titles and abstracts, 159 papers were chosen for a full reading, 50 of which met the eligibility criteria and were included as the basis for this review. The size of the audience, the weather, and the behavior of the crowd seem to contribute significantly to the estimated need for resources in sporting events. Conclusion: Mass events require planning for prevention and to strengthen the resilience of host communities. There is a still a lack of evidence that these events increase the risk of the mass spreading of disease. Level of Evidence: V; Expert opinion .

Interorganizational Communication at Mass Gatherings: Professionals' Perceptions during the Planning and Implementation Stage of Marathon Events

INTRODUCTION

Mass gatherings (MGs) often bring together professionals and organizations that collaborate irregularly or have never engaged in joint working. They involve interaction and communication among multiple and diverse services, which can often prove challenging. Planning such an event is of paramount importance for its success, and interorganizational communication ranks among its most important aspects. Nonetheless, there is limited empirical evidence to support interagency communication in MGs.

OBJECTIVE

This study used the 2017 Athens Marathon (Athens, Greece) as the empirical setting to examine how interorganizational communication was perceived among the multiple public health and safety professionals during the planning and implementation phase of the event.

METHODS

Data comprised 15 semi-structured in-depth interviews with key informants, direct observations of meetings and the event itself, and documentary analysis. Open coding and thematic analysis were used to analyze the data.

RESULTS

Findings indicated three key components of interorganizational communication in such an event: (1) shared situational awareness; (2) interorganizational understanding; and (3) implementing liaison officers.

CONCLUSION

This study outlined the factors that influenced interorganizational communication before and during a MG. Practical implications arising from this study may inform the way organizers of marathons and other mass sporting events can engage in effective interorganizational communication.

Validation of a Belgian Prediction Model for Patient Encounters at Football Mass Gatherings

BACKGROUND

To validate the Belgian Plan Risk Manifestations (PRIMA) model, actual patient presentation rates (PPRs) from Belgium's largest football stadium were compared with predictions provided by existing models and the Belgian PRIMA model.

METHODS

Actual patient presentations gathered from 41 football games (2010-2019) played at the King Baudouin Stadium (Brussels, Belgium) were compared with predictions by existing models and the PRIMA model. All attendees who sought medical help from in-event health services (IEHS) in the stadium or called 1-1-2 within the closed perimeter around the stadium were included. Data were analyzed by ANOVA, Pearson correlation tests, and Wilcoxon singed-rank test.

RESULTS

A total of 1,630,549 people attended the matches, with 626 people needing first aid. Both the PRIMA and the Hartman model over-estimated the number of patient encounters for each occasion. The Arbon model under-estimated patient encounters for 9.75% (95% CI, 0.49-19.01) of the events. When comparing deviations in predictions between the PRIMA model to the other models, there was a significant difference in the mean deviation (Arbon: Z = -5.566, P <.001, r = -.61; Hartman: Z = -4.245, P <.001, r = .47).

CONCLUSION

When comparing the predicted patient encounters, only the Arbon model under-predicted patient presentations, but the Hartman and the PRIMA models consistently over-predicted. Because of continuous over-prediction, the PRIMA model showed significant differences in mean deviation of predicted PPR. The results of this study suggest that the PRIMA model can be used during planning for domestic and international football matches played at the King Baudouin Stadium, but more data and further research are needed.

Medical Tent Usage From Bank of America Chicago Marathon 2015-2017

BACKGROUND

As mass participation events continue to increase in popularity, the need for medical care continues to increase. Our objective was to evaluate the course medical tent usage throughout the Bank of America Chicago Marathon course. Our second objective was to evaluate emergency medical services (EMS) utilization during the event.

HYPOTHESIS

We hypothesize that as the race progresses, medical tents will see more participants and EMS will have an increase in utilization.

LEVEL OF EVIDENCE

Level 4.

METHODS

This study was a retrospective analysis of data collected by the medical staff from 2015 to 2017. Documented patient encounters were analyzed from each course medical tent. Twenty medical tents were spaced roughly 1.2 miles apart depending on location and ease of EMS access to the medical tent location.

RESULTS

From 2015 to 2017, the course medical tents saw 2973 patients, with a 96.3% discharge rate. The data showed a linear increase of 5.69 patients seen per mile until mile 20 (linear regression P < 0.01). After mile 20, the number of patients seen per mile was about the same. The data also showed an increase in EMS utilization every 5 miles as the race progressed (P = 0.04) and an increase in ratio of patients transported to the hospital compared with patients transferred to the main medical tents up to mile 20 (P = 0.02).

CONCLUSION

Course medical tents saw a statistically significant linear increase in patients per mile until mile 20. Total EMS utilization showed a statistically significant increase in usage as the race progressed and a statistically significant increase in ratio of transports to transfers as the race progressed until mile 20.

CLINICAL RELEVANCE

This study has the potential to influence medical tent and EMS placement for endurance events with increasing patient encounters and hospital transports as the mileage of the endurance event increases.

Medicine at mass gatherings: current progress of preparedness of emergency medical services and disaster medical response during 2020 Tokyo Olympic and Paralympic Games from the perspective of the Academic Consortium (AC2020)

Mass gatherings are events characterized by “the concentration of people at a specific location for a specific purpose over a set period of time that have the potential to strain the planning and response resources of the host country or community.” Previous reports showed that, as a result of the concentration of people in the limited area, injury and illness occurred due to several factors. The response plan should aim to provide timely medical care to the patients and to reduce the burden on emergency hospitals, and to maintain a daily emergency medical services system for residents of the local area. Although a mass gathering event will place a significant burden on the local health‐care system, it can provide the opportunity for long‐term benefits of public health‐care and improvement of daily medical service systems after the end of the event. The next Olympic and Paralympic Games will be held in Tokyo, during which mass gatherings will occur on a daily basis in the context of the coronavirus disease (COVID‐19) epidemic. The Academic Consortium on Emergency Medical Services and Disaster Medical Response Plan during the Tokyo Olympic and Paralympic Games in 2020 (AC2020) was launched 2016, consisting of 28 academic societies in Japan, it has released statements based on assessments of medical risk and publishing guidelines and manuals on its website. This paper outlines the issues and countermeasures for emergency and disaster medical care related to the holding of this big event, focusing on the activities of the academic consortium.

Health Care Services in Shopping Centers: A Routine Mass-Gathering Event

BACKGROUND

Shopping centers (SCs) are social areas with a group of commercial establishments which attract customers of numerous people every day. However, analysis of urgent health conditions and provided health care in SCs has not been performed so far.

OBJECTIVE

The aim of the study was to perform a comparative analysis of clients visiting SCs and demographics, complaints, and health care of patients admitted to Emergency Medical Intervention Units (EMIU) located in grand SCs in Ankara, Turkey.

METHODS

Customer and health care records of nine grand SCs in Ankara from January 1, 2018 through December 31, 2018 were evaluated retrospectively. Health care services in EMIUs of SCs were provided by employed medical staff. Data including demographic characteristics, complaints, treatment protocols, discharge, and referral to hospital of the patients were retrospectively analyzed from medical registration forms.

RESULTS

Medical records of nine grand SCs were analyzed. Number of customers could not be obtained in three SCs due to privacy issues and were not included in patient presentation rate (PPR) and transport-to-hospital rate (TTHR) calculation. Total number of customers in the remaining six SCs were 53,277,239. The total number of patients seeking medical care was 6,749. The number of patients seeking health care in six SCs with known number of customers was 4,498 and PPR ranged from 0.018 to 0.381 patients per 1,000 attendants. The median age of the recorded 4,065 patients (60.2%) was 28 (interquartile range [IQR]: 38-21), and 3,611 (53.5%) of the patients admitted to EMIUs were female. The number of patients treated in the SC was 4,634 (68.6%) and 189 patients (2.8%) were transferred-to-hospital by ambulance for further evaluation and treatment. Transportation to hospital was required in 125 patients who sought medical care in six SCs which provided total number of customers, and TTHR ranged from 0.000 to 0.005 patients per 1,000 attendants. No sudden cardiac death was seen. Medical conditions were the primary reasons for seeking health care. The most frequent causes of presentation were laceration and abrasions (639 patients, 9.4%).

CONCLUSION

The PPR and TTHR in SCs are low. The most common causes of presentation are minor conditions and injuries. Majority of urgent medical conditions in SCs can be managed by health care providers in EMIUs.

An Overview of Chicago (Illinois USA) Marathon Prehospital Care Demographics, Patient Care Operations, and Injury Patterns

INTRODUCTION

Large-scale mass-sporting events are increasingly requiring greater prehospital event planning and preparation to address inherent event-associated medical conditions in addition to incidents that may be unexpected. The Bank of America Chicago Marathon (Chicago, Illinois USA) is one of the largest marathons in the world, and with the improvement of technology, the use of historical patient and event data, in conjunction with environmental conditions, can provide organizers and public safety officials a way to plan based on injury patterns and patient demands for care by predicting the placement and timing of needed medical support and resources.

PROBLEM

During large-scale events, disaster planning and preparedness between event organizers, Emergency Medical Services (EMS), and local, state, and federal agencies is critical to ensure participant and public safety.

METHODS

This study looked at the Bank of America Chicago Marathon, a significant endurance event, and took a unique approach of reviewing digital runner data retrospectively over a five-year period to establish patterns of medical demand geographically, temporally, and by the presenting diagnoses. Most medical complaints were musculoskeletal in nature; however, there were life-threatening conditions such as hyperthermia and cardiac incidents that highlight the need for detailed planning, coordination, and communication to ensure a safe and secure event.

CONCLUSIONS

The Chicago Marathon is one of the largest marathons in the world, and this study identified an equal number of participants requiring care on-course and at the finish line. Most medical complaints were musculoskeletal in nature; however, there were life-threatening conditions such as hyperthermia and cardiac incidents that highlight the need for detailed planning, multi-disciplined coordination, and communication to ensure a safe and secure event. As technology has evolved, the use, analysis, and implementation of historical digital data with various environmental conditions can provide organizers and public safety officials a map to plan injury patterns and patient demands by predicting the placement and timing of needed medical support, personnel, and resources.

PyeongChang 2018 Winter Olympic Games and athletes' usage of 'polyclinic' medical services

Objective

This paper aims to describe the medical service of two polyclinics of the PyeongChang Winter Olympic Games and to analyse the injury and illness of athletes who visited the polyclinics during the oilympic period in order to provide some insight with respect to the future construction and operation of polyclinics in mass gathering events such as the Olympic Games.

Methods

The PyeongChang Olympic Village was located near the Olympic Stadium for snow sports athletes and the Gangneung Olympic Village was located near the ice venues for ice sports athletes. During the Olympic Games, polyclinics were consisted of emergency service and outpatient clinics. We retrospectively analysed the electronic medical record data of athletes who visiting polyclinics between 9 February 2018 and 25 February 2018.

Results

During the Olympics, there were 1639 athlete encounters in both polyclinics. Among those, injuries of athletes were 237 (14% of all athlete encounters) in total, and the most common injured site was knee joint. Upper respiratory infection was the most frequent case in diseases of athlete encounters. Total 223 cases of image study were done, MRI was 44 cases.

Conclusion

The PyeongChang Winter Olympic Games had the highest number of participants in the history of Winter Olympic Games. Overall 48% of athletes encountered polyclinics due to disease during the Games period. Upper respiratory infection and other seasonal diseases were more frequent this Olympic Games than before. Polyclinics were managed healthcare of athletes as well as injury and illness of athletes. In winter sports, a polyclinic and similar medical facilities should be prepare for diseases considering geography, weather as well as injuries and endemic diseases when planning future mass gathering events.

Incidence and characteristics of severe exercise-associated collapse at the world's largest half-marathon

Background

Whilst many health benefits are associated with regular exercise, medical complications may occur during higher-intensity activities, such as long distance running contests. The most common complication is collapse. However, the incidence and characteristics of these collapses are not very well studied.

Method

This is a retrospective study of severe collapse, defined as a patient in need of advanced medical care after a collapse, during the large Gothenburg’s half marathon, Göteborgsvarvet. The study included 230,501 competitors during the study-period of 5 years (2013–2017) with data being collected from medical race tents and using ambulance data. Vital signs, treatment and blood gas samples were noted and analyzed.

Results

The incidence of severe collapse was 1.53 per 1000 starting runners. The average age for patients was 34 years old and no difference in incidence were seen between male and female runners. The typical collapsed runner presented with tachycardia, normal systolic blood pressure, elevated body temperature and metabolic acidosis. The most common medical encounter was exercise-associated collapse.

Conclusion

The incidence of severe collapse was similar to findings in other studies, even though this study was set in different part of the world. Typical characteristics of a collapsed runner were identified providing new information which could be beneficial in the medical planning of larger running competitions and future preventative interventions. Importantly, life threatening conditions seem uncommon; no case of hyponatremia and only two cases of hypoglycemia were seen.

Use of Predictive Modeling to Plan for Special Event Medical Care During Mass Gathering Events

Objectives:

In 2010, South Africa (SA) hosted the Fédération Internationale de Football Association (FIFA) World Cup (soccer). Emergency Medical Services (EMS) used the SA mass gathering medicine (MGM) resource model to predict resource allocation. This study analyzed data from the World Cup and compared them with the resource allocation predicted by the SA mass gathering model.

Methods:

Prospectively, data were collected from patient contacts at 9 venues across the Western Cape province of South Africa. Required resources were based on the number of patients seeking basic life support (BLS), intermediate life support (ILS), and advanced life support (ALS). Overall patient presentation rates (PPRs) and transport to hospital rates (TTHRs) were also calculated.

Results:

BLS services were required for 78.4% (n = 1279) of patients and were consistently overestimated using the SA mass gathering model. ILS services were required for 14.0% (n = 228), and ALS services were required for 3.1% (n = 51) of patients. Both ILS and ALS services, and TTHR were underestimated at smaller venues.

Conclusions:

The MGM predictive model overestimated BLS requirements and inconsistently predicted ILS and ALS requirements. MGM resource models, which are heavily based on predicted attendance levels, have inherent limitations, which may be improved by using research-based outcomes.

Qualitative study of health system preparedness for traumatic incidents in a religious mass gathering

BACKGROUND AND OBJECTIVES

Traumatic incidents may occur during religious mass gatherings. A lack of preparedness by the health system to respond to traumatic incidents may increase the mortality rate. This study investigated the factors that affect the preparedness of a health system to respond to traumatic incidents, and we provide appropriate suggestions for improving the response to such incidents during religious mass gatherings.

METHODS

A qualitative research method was used with a conventional content analysis approach. In total, 22 semi-structured interviews were conducted employing the content analysis method. The data were analyzed based on the means of the meaning units, condensed meaning units, sub-themes, themes, and codes.

RESULTS

Four main categories and nine sub-categories emerged from the data: factors that increased or decreased the occurrence of incidents (with three sub-categories comprising risk perception and fatalism, pilgrims' responses to incidents, and health system response to traumatic events); medical infrastructure (with two sub-categories comprising medical infrastructure in the host country and medical structures in border cities); organizational resource category (with two sub-categories comprising manpower, and equipment and facilities); and coordination of responsible organizations (with two sub-categories comprising inter-organizational coordination and inter-agency collaboration). All of the data were extracted from the experiences of the participants.

CONCLUSION

Similar to other mass gatherings, Arbaeen requires multi-sectoral and international planning, organizing, and management. The key factors that could improve the preparedness to respond to traumatic events in Arbaeen include training, increasing the perception of risk, changing the attitudes and behavior of pilgrims, developing a national strategic plan of the health system preparedness for policymakers, and implementing scenario-based exercises for executives.

Evaluation of Health Care Services Provided in Political Public Meetings in Turkey: A Forgotten Detail in Politics

Background

Political parties in Turkey execute political public meetings (PPMs) during their election campaign for members of the parliament (MoP). A great number of people attend these meetings. No guidelines exist regarding preparation and organization of health care services provided during these meetings. Furthermore, there is no study evaluating health care problems encountered in previous PPMs.

Objective

Political parties arranged PPMs in 2015 during the election campaign for general election of MoP. The present study aimed to investigate the context of health care services, the distribution of assigned health staff, as well as the number and the symptoms of patients admitted in health care tents in these PPMs.

Methods

Two general elections for MoP were done in Turkey on June 7, 2015 and November 1, 2015. Health care services were provided by the City Emergency Medical Services Department (CEMSD) in the cities. Demographic characteristics, symptoms, comorbid conditions, treatment, discharge, and hospital transfer of the patients were obtained from patient medical registration records. Information about the distribution and the number of the assigned staff was received from local CEMSDs. The impact of variables such as the number of attendees, heat index, humidity, and the day of the week on the number of patients and the patient presentation rate (PPR) were analyzed.

Results

A total of 97 PPMs were analyzed. The number of total attendees was 5,265,450 people. The number of patients seeking medical help was 1,991. The PPR was 0.5 (0.23-0.91) patients per 1,000 attendees. Mean age of the patients was 40 (SD=19) years old while 1,174 (58.9%) of the patients were female. A total of 1,579 patients were treated in the tents and returned to the PPM following treatment. Two-hundred and three patients were transferred to a hospital by ambulance. Transfer-to-hospital ratio (TTHR) was 0.05 (0.0-0.13) patients per 1,000 attendees. None of the patients suffered sudden cardiac death (SCD) or cardiac arrest. Medical conditions were the main cause for admission. The most common symptoms were dizziness, low blood pressure, fatigue, and hypertension, respectively. The most commonly used medical agents included pain killers and myorelaxants. The number of attendees, heat index, and weekend days were positively correlated with the number of the patients.

Conclusion

: The majority of medical conditions encountered in PPMs are easily treatable in health care tents settled in the meeting area. The number of attendees, heat index, and weekend days are factors associated with the number of patients.

CeyhanMA, DemirGG, GülerGB. Evaluation of health care services provided in political public meetings in Turkey: a forgotten detail in politics. Prehosp Disaster Med. 2018;33(6):607–613.

Leading interagency planning and collaboration in mass gatherings: public health and safety in the 2012 London Olympics

OBJECTIVES

Planning and implementing public health initiatives in mass gatherings such as the Olympic Games pose unique challenges for interorganizational collaboration, which involves interaction among multiple and diverse agencies. Nonetheless, there is limited empirical evidence to support interagency collaboration and public health planning decisions in mass gatherings and how leadership can shape such interactions. We empirically explored these topics in the 2012 London Olympics to identify lessons to inform planning for future mass gatherings.

STUDY DESIGN

This is a qualitative case study.

METHODS

Data comprised 39 semistructured interviews with key informants conducted before, during, and after the games; in addition, direct observations of field exercises and documentary analysis were also used. Open coding and thematic analysis was used to analyze the data.

RESULTS

We identified two main leadership challenges that influenced interagency collaboration: organizational public health leadership and coordinating collaborative decision-making. Two facilitative conditions helped overcome the previous challenges: nurturing interorganizational linkages and creating shared understanding by activating codified frameworks at the organizational level.

CONCLUSIONS

Our study highlights leadership issues in interagency collaboration in mass gatherings. Practical implications arising from this study may inform the ways the organizers of mass gatherings, public health and safety agencies, and professionals can engage in effective partnerships and joint working.

Nonlinear Modelling for Predicting Patient Presentation Rates for Mass Gatherings

IntroductionMass gatherings are common in Australia. The interplay of variables, including crowd density and behavior, weather, and the consumption of alcohol and other drugs, can pose a unique set of challenges to attendees' well-being. On-site health services are available at most mass gatherings and reduce the strain on community health facilities. In order to efficiently plan and manage these services, it is important to be able to predict the number and type of presenting problems at mass gatherings.ProblemThere is a lack of reliable tools to predict patient presentations at mass gatherings. While a number of factors have been identified as having an influence on attendees' health, the exact contribution of these variables to patient load is poorly understood. Furthermore, predicting patient load at mass gatherings is an inherently nonlinear problem, due to the nonlinear relationships previously observed between patient presentations and many event characteristics.

METHODS

Data were collected at 216 Australian mass gatherings and included event type, crowd demographics, and weather. Nonlinear models were constructed using regression trees. The full data set was used to construct each model and the model was then used to predict the response variable for each event. Nine-fold cross validation was used to estimate the error that may be expected when applying the model in practice.

RESULTS

The mean training errors for total patient presentations were very high; however, the distribution of errors per event was highly skewed, with small errors for the majority of events and a few large errors for a small number of events with a high number of presentations. The error was five or less for 40% of events and 15 or less for 85% of events. The median error was 6.9 presentations per event.

CONCLUSION

This study built on previous research by undertaking nonlinear modeling, which provides a more realistic representation of the interactions between event variables. The developed models were less useful for predicting patient presentation numbers for very large events; however, they were generally useful for more typical, smaller scale community events. Further research is required to confirm this conclusion and develop models suitable for very large international events.Arbon P, Bottema M, Zeitz K, Lund A, Turris S, Anikeeva O, Steenkamp M. Nonlinear modelling for predicting patient presentation rates for mass gatherings. Prehosp Disaster Med. 2018;33(4):362-367.

Substance use patterns and in-hospital care of adolescents and young adults attending music concerts

Background

Few studies describe medical complaints and substance use patterns related to attending music concerts. As such, the objective of this study is to describe patient demographics, substance use and intoxication patterns, and medical interventions provided to adolescents and young adults assessed in an emergency department (ED) for complaints directly related to concert attendance.

Methods

A retrospective chart review of patients 13–30 years old who were transported to the ED directly from music concerts between January 2011 and December 2015 was conducted. Descriptive statistics and logistic regression were used to analyze patient demographic, intervention, and substance use data.

Results

There were 115 concerts identified, of which 48 (42%) were linked to 142 relevant ED visits; the total number of attendees at each concert is unknown. The mean age of the 142 described patients was 19.5 years (SD 3.3) with 72% < 21 and 33% < 18; 71% of patients were female and 96% of visits were substance-use related. Mean blood alcohol level was 242 mg/dL (range 104–412, SD 70). Glasgow Coma Scale (GCS) scores ranged from 3 to 15, with a mean of 14. Two patients required intubation and 61% of patients received interventions, including medications (47%), intravenous fluids (46%), specialty consultation (20%), restraints (14%), imaging (6%), and laceration repair (3%). Attendance at pop and electronic dance music concerts was associated with the widest ranges of GCS scores (8–15 and 6–14 respectively), mass casualty incident declarations, and among the highest mean blood alcohol levels (246 and 244 mg/dL, respectively).

Conclusions

Substance use is the predominant reason for music concert related ED visits and patients may have serious levels of intoxication, receiving multiple medical interventions. These data demonstrate the need for additional large-scale studies to confirm trends and increase awareness of this important public health problem.

ANALYSIS OF MEDICAL ASSISTANCE PROVIDED TO SPECTATORS AT THE 2014 FIFA WORLD CUP MATCHES

Objective:

Several studies have already described the main injuries to soccer players during FIFA World Cup events; however, little is known about the main reasons spectators require medical assistance during these matches. The aim of this study is to assess the number of cases and main reasons spectators required medical assistance during the 2014 World Cup matches in Brazil.

Methods:

Data were collected from spectators who received medical assistance on all game days, and factors related to the assistance provided were analyzed.

Results:

Medical assistance was given to spectators in a total of 6,222 cases during the 64 games played in Brazil, an average of 97.2 times per game. The total number of spectators removed from the stadiums by ambulance was 167, a mean of 2.6 removals per game. The main reasons spectators required medical assistance during the World Cup games were headache, gastrointestinal problems, and trauma.

Conclusions:

Most spectators required medical assistance during the World Cup games for headache, gastrointestinal problems, and trauma; this information is fundamental to develop new prevention strategies and plan medical assistance for large-scale events. Level of Evidence IV; Case series.

Medical Coverage in Mass Events: The Oxfam Trailwalker 1996 to 2007

Medical coverage of mass events is quite different from medical practice within hospitals. The environment can be hostile and chaotic. Participants may behave unpredictably due to the effects of alcohol, drugs, or simple surges of adrenaline during sports events. Emergency physicians have provided medical coverage for many events. Together with emergency nurses, they formed core members of the medical teams in these events. It is natural as staffs of emergency departments are trained to handle acute medical and surgical illnesses. In many cases, emergency physicians are medical directors of events and are responsible for organising and coordinating such medical coverage. Local examples are the Sixth World Trade Organization Ministerial Conference in 2005, the Oxfam Trailwalker, and the Equestrian Event of the 2008 Beijing Olympics and Paralympics. It is expected that many more emergency physicians will be invited to organise medical coverage for mass events in Hong Kong. Doctors from other specialties will provide additional assets. Input from doctors specialised in rehabilitation, for example, can implement the concept of rehabilitation in planning medical coverage. This article serves to illustrate the principles used in the medical coverage of Oxfam Trailwalker. Trailwalker was started as endurance training for the Gurkhas in Hong Kong. Walkers formed teams of four to complete the 100 km MacLehose Trail within a 48-hour time limit. Oxfam Trailwalker has a crowd of over 10,000 participants each year. The number of medical contacts is about 1600 to 1800 each year.

EMS Coverage of a Female-Only Event with 10,000 Attendees: Preparation and Implementation in One Week

This report describes the medical coverage provided for 10KSA, a charity event held in Saudi Arabia for breast cancer awareness. More than 10,000 women attended the event. A total of 41 attendees sought medical care; four patients (9.8%) presented directly to the clinic and 37 patients (90.2%) presented to the first aid units, mostly for check-ups. This report may be helpful for care providers arranging medical coverage for future events with similar challenging situations (women only, distant location).

AlAssafWI. EMS coverage of a female-only event with 10,000 attendees: preparation and implementation in one week. Prehosp Disaster Med. 2017;32(6):694–698.

Mass-Gathering Medical Care in Electronic Dance Music Festivals

Introduction

Electronic dance music (EDM) festivals represent a unique subset of mass-gathering events with limited guidance through literature or legislation to guide mass-gathering medical care at these events.

Hypothesis/Problem

Electronic dance music festivals pose unique challenges with increased patient encounters and heightened patient acuity under-estimated by current validated casualty predication models.

Methods

This was a retrospective review of three separate EDM festivals with analysis of patient encounters and patient transport rates. Data obtained were inserted into the predictive Arbon and Hartman models to determine estimated patient presentation rate and patient transport rates.

Results

The Arbon model under-predicted the number of patient encounters and the number of patient transports for all three festivals, while the Hartman model under-predicted the number of patient encounters at one festival and over-predicted the number of encounters at the other two festivals. The Hartman model over-predicted patient transport rates for two of the three festivals.

Conclusion

Electronic dance music festivals often involve distinct challenges and current predictive models are inaccurate for planning these events. The formation of a cohesive incident action plan will assist in addressing these challenges and lead to the collection of more uniform data metrics.

FitzGibbonKM, NableJV, AydB, LawnerBJ, ComerAC, LichensteinR, LevyMJ, SeamanKG, BusseyI. Mass-gathering medical care in electronic dance music festivals. Prehosp Disaster Med. 2017;32(5):563–567.

Crowd Simulations and Determining the Critical Density Point of Emergency Situations

OBJECTIVE

In modern societies, crowds and mass gatherings are recurrent. A combination of inadequate facilities and inefficient population management can lead to injury and death. Simulating people's behavior in crowds and mass gatherings can assist in the planning and management of gatherings, especially in emergency situations.

METHODS

We aimed to determine the crowd pattern and the critical density point in the grand bazaar of Kerman in Iran. We collected data by use of a census method with a questionnaire. To determine the critical density point, height and weight data were placed in the equation $\,s\,{\equals}\,\sqrt {{{L{\vskip -1.5pt \,\,\asterisk\,\,}M} \over {3600}}} $ and the outer body surface of all the individuals in the bazaar was calculated. The crowd was simulated by use of flow-based modeling. Flow rate was determined by using the equation (flow rate=density * speed). By use of SketchUp Pro software (version 8; Trimble, Sunnyvale, CA), the movement of each person and the general flow rate were simulated in the three-dimensional environment of Kerman bazaar.

RESULTS

Our findings showed that the population critical density point in Kerman bazaar would be 6112 people. In an accident, the critical density point in Kerman bazaar would be created in about 1 minute 10 seconds after the event.

CONCLUSION

It seems necessary to identify and provide solutions for reducing the risk of disasters caused by overcrowding in Kerman bazaar. It is suggested that researchers conduct studies to design safe and secure emergency evacuation of Kerman bazaar as well as proper planning for better and faster access of aid squads to this location. (Disaster Med Public Health Preparedness. 2017;11:674-680).

Emergency nurse disaster preparedness during mass gatherings: a cross-sectional survey of emergency nurses' perceptions in hospitals in Mecca, Saudi Arabia

OBJECTIVES

To assess hospital emergency nurses' self-reported knowledge, role awareness and skills in disaster response with respect to the Hajj mass gathering in Mecca.

DESIGN

Cross-sectional online survey with primary data collection and non-probabilistic purposive sample conducted in late 2014.

SETTING

All 4 public hospitals in Mecca, Saudi Arabia.

PARTICIPANTS

106 registered nurses in hospital emergency departments.

MAIN OUTCOME MEASURE

Awareness, knowledge, skills and perceptions of emergency nurses in Mecca with regard to mass gathering disaster preparedness.

RESULTS

Although emergency nurses' clinical role awareness in disaster response was reported to be high, nurses reported limited knowledge and awareness of the wider emergency and disaster preparedness plans, including key elements of their hospital strategies for managing a mass gathering disaster. Over half of the emergency nurses in Mecca's public hospitals had not thoroughly read the plan, and almost 1 in 10 were not even aware of its existence. Emergency nurses reported seeing their main role as providing timely general clinical assessment and care; however, fewer emergency nurses saw their role as providing surveillance, prevention, leadership or psychological care in a mass gathering disaster, despite all these broader roles being described in the hospitals' emergency disaster response plans. Emergency nurses' responses to topics where there are often misconceptions on appropriate disaster management indicated a significant knowledge deficit with only 1 in 3 nurses at best or 1 in 6 at worst giving correct answers. Respondents identified 3 key training initiatives as opportunities to further develop their professional skills in this area: (1) hospital education sessions, (2) the Emergency Management Saudi Course, (3) bespoke short courses in disaster management.

CONCLUSIONS

Recommendations are suggested to help enhance clinical and educational efforts in disaster preparedness.

Music Genre as a Predictor of Resource Utilization at Outdoor Music Concerts

Objectives

The aim of this study was to examine the various modern music genres and their effect on the utilization of medical resources with analysis and adjustment for potential confounders.

Methods

A retrospective review of patient logs from an open-air, contemporary amphitheater over a period of 10 years was performed. Variables recorded by the medical personnel for each concert included the attendance, description of the weather, and a patient log in which nature and outcome were recorded. The primary outcomes were associations of genres with the medical usage rate (MUR). Secondary outcomes investigated were the association of confounders and the influences on the level of care provided, the transport rate, and the nature of medical complaint.

Results

A total of 2,399,864 concert attendees, of which 4,546 patients presented to venue Emergency Medical Services (EMS) during 403 concerts with an average of 11.4 patients (annual range 7.1-17.4) each concert. Of potential confounders, only the heat index ≥90°F (32.2°C) and whether the event was a festival were significant (P=.027 and .001, respectively). After adjustment, the genres with significantly increased MUR in decreasing order were: alternative rock, hip-hop/rap, modern rock, heavy metal/hard rock, and country music (P<.05). Medical complaints were significantly increased with alternative rock or when the heat index was ≥90°F (32.2°C; P<.001). Traumatic injuries were most significantly increased with alternative rock (P<.001). Alcohol or drug intoxication was significantly more common in hip-hop/rap (P<.001). Transport rates were highest with alcohol/drug intoxicated patients (P<.001), lowest with traumatic injuries (P=.004), and negatively affected by heat index ≥90°F (32.2°C; P=.008), alternative rock (P=.017), and country music (P=.033).

Conclusion

Alternative rock, hip-hop/rap, modern rock, heavy metal/hard rock, and country music concerts had higher levels of medical resource utilization. High heat indices and music festivals also increase the MUR. This information can assist event planners with preparation and resource utilization. Future research should focus on prospective validation of the regression equation.

Westrol MS, KoneruS, McIntyreN, Caruso AT, ArshadFH, MerlinMA. Music genre as a predictor of resource utilization at outdoor music concerts. Prehosp Disaster Med. 2017;32(3):289–296.

Public Medical Preparedness at the "Swiss Wrestling and Alpine Games 2013": Descriptive Analysis of 1,533 Patients Treated at the Largest 3-Day Sporting Event in Switzerland

Introduction. Medical preparedness at mass gatherings is challenging, as little is known about the optimal planning. Most studies and case reports are based on mass casualty incidents, so the results cannot be extrapolated to mass gatherings. Aim of this study was to evaluate the preclinical medical structure and the frequency of specific injuries and medical emergencies during the event. Methods. Retrospective analysis of a prospectively collected database. Three on-site medical assistance points were set up, completed by mobile teams, and coordinated by an on-site operational management team. Medical staff requirements were calculated using Maurer's formula. Results. A total of 1,533 patients were treated during the three-day event. Overall, the medical usage rate (MUR; patients per 10,000 visitors) was 51.1. A total of 58 patients (3.8%) required a hospital transfer. In 1,063 cases (69.3%) a diagnosis was documented. Of these, 503 patients (47.3%) suffered from hymenoptera stings; the two most common non-trauma-related diagnoses were alcohol/drug intoxication (4.1%) and gastrointestinal diseases (4.0%). Conclusion. Overall, the on-site medical care worked well. However, a high frequency of hymenoptera stings occurred, resulting in a shortage of antihistamine medication. Moreover, more than half of the patients were managed at the second largest medical assistance point. Prospective and critical evaluation of medical care at mass gatherings is crucial in order to optimize on-site medical preparedness at future events.

Mass gathering medicine: event factors predicting patient presentation rates

This study was conducted to identify the event characteristics of mass gatherings that predict patient presentation rates held in a southeastern US university community. We conducted a retrospective review of all event-based emergency medical services (EMS) records from mass gathering patient presentations over an approximate 23 month period, from October 24, 2009 to August 27, 2011. All patrons seen by EMS were included. Event characteristics included: crowd size, venue percentage filled seating, venue location (inside/outside), venue boundaries (bounded/unbounded), presence of free water (i.e., without cost), presence of alcohol, average heat index, presence of climate control (i.e., air conditioning), and event category (football, concerts, public exhibitions, non-football athletic events). We identified 79 mass gathering events, for a total of 670 patient presentations. The cumulative patron attendance was 917,307 persons. The patient presentation rate (PPR) for each event was calculated as the number of patient presentations per 10,000 patrons in attendance. Overdispersed Poisson regression was used to relate this rate to the event characteristics while controlling for crowd size. In univariate analyses, increased rates of patient presentations were strongly associated with outside venues [rate ratio (RR) = 3.002, p < 0.001], unbounded venues (RR = 2.839, p = 0.001), absence of free water (RR = 1.708, p = 0.036), absence of climate control (RR = 3.028, p < 0.001), and a higher heat index (RR = 1.211 per 10-unit heat index increase, p = 0.003). The presence of alcohol was not significantly associated with the PPR. Football events had the highest PPR, followed sequentially by public exhibitions, concerts, and non-football athletic events. In multivariate models, the strong predictors from the univariate analyses retained their predictive significance for the PPR, together with heat index and percent seating. In the setting of mass event medical care, we note that several factors are strongly associated with an increased patient census, including outside (external) or unbounded venues, the absence of fee water (i.e., without cost), no climate control, percent (occupied) seating, and increasing heat index. Although the presence of alcohol is noted to increase patient needs, it does not do so significantly. Regarding event type, collegiate football games have the highest patient census among the range of other events studied. These findings should be considered during the process of EMS resource planning for mass gatherings.

Medical planning for mass-participation running events: a 3-year review of a half-marathon in Singapore

Background

Systematically planning appropriate medical coverage for mass-participation running events is a challenge that has received relatively little attention in the medical literature, despite its potentially severe consequences. In particular, the literature lacks quantitative information on running events that medical planners can utilize for decisions on medical resource allocation and deployment.

Methods

Using a case-study approach, this study provides a detailed quantitative medical services utilization profile for the Singapore Army Half-Marathon, constructed from participant and casualty data spanning three years and comprising over 80,000 data points. Casualty rates for participants of varying age and sex in different running events were also estimated using a multivariate logistic regression model. Qualitatively, planning processes and practices were described and discussed.

Results

The quantitative profile yielded three main findings. Firstly, the analysis reveals that the gross Medical Usage Rate had remained fairly stable at between 16.9 and 26.0 casualties per 10,000 participants over the three years. Secondly, comparing injury types, musculoskeletal and soft-tissue injuries were the most commonly-presented injuries. Thirdly, more casualties presented at the race end-point as compared to the along the race routes. The regression analysis showed that, of the four modeled variables, the longer event distance (21 km vs. 10 km) had the largest effect on the likelihood that a participant would become a casualty. Conversely, being of an older age, being male, and running in a non-competitive event were each associated with lower casualty risk.

Conclusions

The stable and intuitive casualty patterns detailed in this study provide a strong basis for further quantitative research on the medical aspects of running events, as well as for mass-participation sporting events in general. The qualitative aspects of this report may serve as a useful resource to medical planners for running events.

Characterization of medical care at the 161-km Western States Endurance Run

OBJECTIVE

To examine the medical care at a highly competitive 161-km mountain ultramarathon.

METHODS

Encounter forms from the 2010 through 2013 Western States Endurance Run were analyzed for trends in consultation and use of intravenous fluids.

RESULTS

A total of 63 consultations (8.2% of starters) were documented in 2012 and 2013, of which 10% involved noncompetitors. Most (77%) of the consultations with competitors occurred on the course rather than at the finish line, and were generally during the middle third of the race. Of the on-course consultations, the runner was able to continue the race 55% of the time, and 75% of those who continued after consultation ultimately finished the race. Relative number of consultations did not differ among competitors within 10-year age groups (P = .7) or between men and women (P = .2). Overall, consultations for medical issues were predominant, and nausea and vomiting accounted for the single highest reason for consultation (24%). Although there was an overall decrease in finish line consultations and intravenous fluid use from 2010 through 2013 (P < .0001 for both) that was independent of maximum ambient temperature (P = .3 and P = .4), the proportion of those being treated with intravenous fluids relative to those receiving consultation at the finish line was directly related to maximum ambient temperature (r = .93, P = .037). Both 2012 and 2013 had a single medical emergency that required emergency evacuation.

CONCLUSIONS

This work demonstrates that the medical needs in a 161-km ultramarathon are mostly for minor issues. However, occasional serious issues arise that warrant a well-organized medical system.

Comparison of Prediction Models for Use of Medical Resources at Urban Auto-racing Events

Introduction

Predicting the number of patient encounters and transports during mass gatherings can be challenging. The nature of these events necessitates that proper resources are available to meet the needs that arise. Several prediction models to assist event planners in forecasting medical utilization have been proposed in the literature.

Hypothesis/Problem

The objective of this study was to determine the accuracy of the Arbon and Hartman models in predicting the number of patient encounters and transportations from the Baltimore Grand Prix (BGP), held in 2011 and 2012. It was hypothesized that the Arbon method, which utilizes regression model-derived equations to estimate, would be more accurate than the Hartman model, which categorizes events into only three discreet severity types.

Methods

This retrospective analysis of the BGP utilized data collected from an electronic patient tracker system. The actual number of patients evaluated and transported at the BGP was tabulated and compared to the numbers predicted by the two studied models. Several environmental features including weather, crowd attendance, and presence of alcohol were used in the Arbon and Hartman models.

Results

Approximately 130,000 spectators attended the first event, and approximately 131,000 attended the second. The number of patient encounters per day ranged from 19 to 57 in 2011, and the number of transports from the scene ranged from two to nine. In 2012, the number of patients ranged from 19 to 44 per day, and the number of transports to emergency departments ranged from four to nine. With the exception of one day in 2011, the Arbon model overpredicted the number of encounters. For both events, the Hartman model overpredicted the number of patient encounters. In regard to hospital transports, the Arbon model underpredicted the actual numbers whereas the Hartman model both overpredicted and underpredicted the number of transports from both events, varying by day.

Conclusions

These findings call attention to the need for the development of a versatile and accurate model that can more accurately predict the number of patient encounters and transports associated with mass-gathering events so that medical needs can be anticipated and sufficient resources can be provided.

NableJV,MargolisAM,LawnerBJ,HirshonJM,PerriconeAJ,GalvagnoSM,LeeD,MillinMG,BissellRA,AlcortaRL.Comparison of prediction models for use of medical resources at urban auto-racing events.Prehosp Disaster Med.2014;29(6):1-6.

Formula One Night Race in Singapore: A 4-Year Analysis of a Planned Mass Gathering

Introduction

Every mass gathering presents its unique characteristics that influence medical resource utilization. Medical planning for mass gatherings involves both use of predictive models and analysis of data from similar past events. This study aimed to describe the medical presentations and the unique challenges influencing medical planning at the Formula One Singtel Singapore Grand Prix, the inaugural Formula One night race. Patient presentation characteristics, rates of patient presentation, and transportation to hospitals in association with attendance and heat index were evaluated over a 4-year period from 2009 through 2012. This will facilitate medical planning for similar events.

Methods

A database containing patient presentations from the 3-day Singapore Grand Prix in 2009, 2010, 2011, and 2012 was analyzed. Patient presentations were categorized by time of day and presenting complaints. Patient presentation rates (PPRs) were analyzed to determine correlation with attendance numbers and heat index.

Results

The average annual attendance at the Singapore Grand Prix was 81,992 from 2009 through 2012. The average PPR was 2.17 (SD=0.63)/1,000 attendees. The average transport to hospital rate (TTHR) was 0.033 (SD=0.026)/1,000 attendees. While medical coverage was provided at the circuit park between 2:00 pm to 1:00 am daily, most attendees presented from 5:00 pm to 10:00 pm. The most common presenting complaints included: musculoskeletal conditions (59%) and heat related illnesses (19%). There was no correlation between attendance numbers and PPR and the heat index and PPR.

Conclusion

Musculoskeletal conditions and heat-related illnesses were the most common presenting complaints at the Singapore Grand Prix from 2009-2012. The lack of correlation between heat index and PPR is a new finding compared with prior studies. This could be due to the minimal heat variation that occurred during the night event. Further study is required to refine models that can be used in specialized events.

HoWH, KoenigKL, QuekLS. Formula One night race in Singapore: a 4-year analysis of a planned mass gathering. Prehosp Disaster Med. 2014;29(5):1-5.

Infectious diseases prioritisation for event-based surveillance at the European Union level for the 2012 Olympic and Paralympic Games

In 2012, London hosted the Olympic and Paralympic Games (the Games), with events occurring throughout the United Kingdom (UK) between 27 July and 9 September 2012. Public health surveillance was performed by the Health Protection Agency (HPA). Collaboration between the HPA and the European Centre for Disease Prevention and Control (ECDC) was established for the detection and assessment of significant infectious disease events (SIDEs) occurring outside the UK during the time of the Games. Additionally, ECDC undertook an internal prioritisation exercise to facilitate ECDC’s decisions on which SIDEs should have preferentially enhanced monitoring through epidemic intelligence activities for detection and reporting in daily surveillance in the European Union (EU). A team of ECDC experts evaluated potential public health risks to the Games, selecting and prioritising SIDEs for event-based surveillance with regard to their potential for importation to the Games, occurrence during the Games or export to the EU/European Economic Area from the Games. The team opted for a multilevel approach including comprehensive disease selection, development and use of a qualitative matrix scoring system and a Delphi method for disease prioritisation. The experts selected 71 infectious diseases to enter the prioritisation exercise of which 27 were considered as priority for epidemic intelligence activities by ECDC for the EU for the Games.

Validation of a Modified Medical Resource Model for Mass Gatherings

Introduction

A modified Medical Resource Model to predict the medical resources required at mass gatherings based on the risk profile of events has been developed. This study was undertaken to validate this tool using data from events held in both a developed and a developing country.

Methods

A retrospective study was conducted utilizing prospectively gathered data from individual events at Old Trafford Stadium in Manchester, United Kingdom, and Ellis Park Stadium, Johannesburg, South Africa. Both stadia are similar in design and spectator capacity. Data for Professional Football as well as Rugby League and Rugby Union (respectively) matches were used for the study. The medical resources predicted for the events were determined by entering the risk profile of each of the events into the Medical Resource Model. A recently developed South African tool was used to predetermine medical staffing for mass gatherings. For the study, the medical resources actually required to deal with the patient load for events within the control sample from the two stadia were compared with the number of needed resources predicted by the Medical Resource Model when that tool was applied retrospectively to the study events. The comparison was used to determine if the newly developed tool was either over- or under-predicting the resource requirements.

Results

In the case of Ellis Park, the model under-predicted the basic life support (BLS) requirement for 1.5% of the events in the data set. Mean over-prediction was 209.1 minutes for BLS availability. Old Trafford displayed no events for which the Medical Resource Model would have under-predicted. The mean over-prediction of BLS availability for Old Trafford was 671.6 minutes. The intermediate life support (ILS) requirement for Ellis Park was under-predicted for seven of the total 66 events (10.6% of the events), all of which had one factor in common, that being relatively low spectator attendance numbers. Modelling for ILS at Old Trafford did not under-predict for any events. The ILS requirements showed a mean over-prediction of 161.4 minutes ILS availability for Ellis Park compared with 425.2 minutes for Old Trafford. Of the events held at Ellis Park, the Medical Resource Model under-predicted the ambulance requirement in 4.5% of the events. For Old Trafford events, the under-prediction was higher: 7.5% of cases.

Conclusion

The medical resources that are deployed at a mass gathering should best match the requirement for patient care at a particular event. An important consideration for any model is that it does not continually under-predict the resources required in relation to the actual requirement. With the exception of a specific subset of events at Ellis Park, the rate of under-prediction for this model was acceptable.

SmithWP, TuffinH, StrattonSJ, WallisLA. Validation of a modified medical resource model for mass gatherings. Prehosp Disaster Med.2013;28(1):1-7.

Mass-Gathering Medicine: Creation of an Online Event and Patient Registry

Introduction/Problem

A review of the mass-gathering medicine literature confirms that the research community currently lacks a standardized approach to data collection and reporting in relation to large-scale community events. This lack of consistency, particularly with regard to event characteristics, patient characteristics, acuity determination, and reporting of illness and injury rates makes comparisons between and across events difficult. In addition, a lack of access to good data across events makes planning medical support on-site, for transport, and at receiving hospitals, challenging. This report describes the development of an Internet-hosted, secure registry for event and patient data in relation to mass gatherings.

Methods

Descriptive; development and pilot testing of a Web-based event and patient registry.

Results

Several iterations of the registry have resulted in a cross-event platform for standardized data collection at a variety of events. Registry and reporting field descriptions, successes, and challenges are discussed based on pilot testing and early implementation over two years of event enrollment.

Conclusion

The Mass-Gathering Medicine Event and Patient Registry provides an effective tool for recording and reporting both event and patient-related variables in the context of mass-gathering events. Standardizing data collection will serve researchers and policy makers well. The structure of the database permits numerous queries to be written to generate standardized reports of similar and dissimilar events, which supports hypothesis generation and the development of theoretical foundations in mass-gathering medicine.

LundA,TurrisSA,AmiriN,LewisK,CarsonM.Mass-gathering medicine: creation of an online event and patient registry.Prehosp Disaster Med.2012;27(6):1-11.

Weather and environmental hazards at mass gatherings

Introduction Reviews of mass gathering events have traditionally concentrated on crowd variables that affect the level and type of medical care needed. Weather and environmental hazards at mass gathering events have not been fully researched. This review examines these events and aims to provide future suggestions for event organisers, medical resource planners, and emergency services, including local hospital emergency departments. Methods A review was conducted using computerised data bases: MEDLINE, The Cochrane Library, HMIC and EMBASE, with Google used to widen the search beyond peer-reviewed publications, to identify grey literature. All peer-review literature articles found containing information pertaining to lessons identified from mass gathering disasters due to weather or environmental hazards leading to participant death, injury or illness were analysed and reviewed. Disasters occurring due to crowd variables were not included. These articles were read, analysed, abstracted and summarised. Results 20 articles from literature search were found detailing mass gathering disasters relating directly to weather or environmental hazards from 1988 – 2011, with only 17 cases found within peer-review literature. Two events grey literature from 2011 are due to undergo further inquiry while one article reviews an event originally occurring in 1922. Analysis of cases were categorised in to heat and cold-related events, lightning and storms and disease outbreak. Conclusions Mass gathering events have an enormous potential to place a severe strain on the local health care system, Prior health resource and environmental planning for heat & cold-related illness, lightning & storms, and disease outbreak can advance emergency preparedness and response to potential disasters. Citation: Soomaroo L, Murray V. Weather and Environmental Hazards at Mass Gatherings. PLoS Currents Disasters. 2012 Jul 31 Keywords: Mass Gatherings, Disasters, Sporting Events, Festivals, Concerts, Storm, Lightning, Cyclone, Hot-weather illness, Cold-weather illness, Disease, Public Health, Syndromic Surveillance Abbreviations: ALS – Advance Life support; BLS – Basic Life support; ED – Emergency Department; EMS – Emergency Medical Services; PPR – Patient Presentation Rate

Medical Care for a Mass Gathering: The Suwa Onbashira Festival

Introduction:

The Suwa Onbashira Festival is held every six years and draws approximately one million spectators from across Japan. Men ride the Onbashira pillars (logs) down steep slopes.At each festival, several people are crushed under the heavy log. During the 2004 festival, for the first time, a medical care system that coordinated a medical team, an emergency medical service, related agencies, and local hospitals was constructed.

Objective:

The aims of this study were to characterize the spectrum of injuries and illness and to evaluate the medical care system of this festival.

Methods:

The festival was held 02 April–10 May 2004. The medical records of all of the patients who presented to an on-site medical tent or who were treated at the scene and transported to hospitals over a 12-day period were reviewed.The following items were evaluated: (1) the emergency medical system at the festival; (2) the environmental circumstances; and (3) patient data.

Results:

All medical usage rates are reported as patients per 10,000 attendees (PPTT). A total 1.8 million spectators attended the festival during the 12-day study period; a total of 237 patients presented to the medical tent (1.32 PPTT), and 63 (27%) were transferred to hospitals (0.35 PPTT). Of the total, 135 (57%) suffered from trauma—two were severely injured with pelvic and cervical spine fractures; and 102 (43%) had medical problems including heat-related illness.

Conclusions:

Comprehensive medical care is essential for similar mass gatherings. The appropriate triage of patients can lead to efficient medical coverage.

Estimation of Healthcare Resources at Sporting Events

Background:

The consequences of a major incident at a sporting event could be catastrophic. Therefore, there should be an estimation of the healthcare resources at such events as part of the planning. Although there are National guidelines (e.g., Planning Safe Public Events: Practical Guidelines in Australia) defining the role of the healthcare system at sporting events, these guidelines either lack a simple calculating method to estimate the need for healthcare resources or the methods are complex and impractical to use. The objective of this study was to find a safe and easy method for the estimation of healthcare resources at sporting events.

Methods:

A model for the estimation of healthcare resources at music events recently has been approved in Sweden. After minor adjustments, this model was used at sport events by a number of planning officers. The models' accuracy and usability was evaluated by analyzing its outcome in a pilot and a controlled study using different sporting and non-sporting scenarios.

Results:

The pilot study showed that the model was valid and easily could be used for various sporting events. The obtained estimations were consistent with the methods used by experienced planning officers in 97% of cases. The results of the controlled study showed that by using this model, the minimum amount of resources required easily could be calculated at sporting events and by people with different backgrounds.

Conclusions:

This model safely can be used at sporting events.

Medical Support for Children's Mass Gatherings

Introduction:

Medical care must be well-planned for mass gatherings. Events such as fairs, concerts, parades, and rallies cause many people to gather in one place, increasing the chance of injuries and for the development of a disaster. In this study, the level and quality of medical care were evaluated at a mass gathering of approximately 100,000 children. The event was a television-sponsored fun fair.

Methods:

Every patient contact was documented on printed forms, including data such as the number of patients treated, gender of the patients, presence or absence of a parental escort, time distribution of patient contacts, the diagnoses for the patient contacts, specific therapies applied, duration of the treatment, and patient discharge information. All data were coded after the event and transferred into a computer database. These data were analyzed using descriptive statistics.

Results:

Of the 100,000 spectators, 192 patients (81 male [42.2%] and 111 female [57.8%]) were treated during the nine-hour period, from 09:00 hours (h) until 18:00 h. Twenty percent of all the children up to the age of 10 years needing medical assistance were not accompanied by an adult. Seventy-five percent of all patient contacts were made during the afternoon. Of those treated, 164 patients (85.4%) suffered only minor injuries and were seen for <10 minutes. The most common type of complaint was minor trauma (103 patients, 53.6%); followed by minor medical problems such as headaches or light allergic reactions (21 patients, 10.9%); insect bites (20 patients, 10.4%); and serious medical problems or trauma such as severe arterial hypertension or long bone fractures (19 patients, 9.9%). Treatment included, but was not limited to, dressings (100 patients; 52.1%), local therapy (68 patient, 35.4%), and analgesic therapy (10 patients, 5.2%). Four patients (2%) were transferred to local hospitals.

Conclusion:

Most of the medical needs in the patients attending the children's fun fair were minor. Nevertheless, for similar events in the future, the medical team should be qualified for all serious medical emergencies, as well as major trauma; and should be prepared to meet the requirements of the specific group of spectators.

The overall usage rate in the children's fun fair described was 19.2 patient encounters per 10,000 spectators. Half of all of the patients were children below the age of 14 years. Medical services should consider that this study shows that up to 33% of children seeking medical assistance may not be accompanied by adults.

Medical Support during the European Union Summit in Gothenburg, Sweden, June 2001

Introduction:

Several factors are important for the number and severity of medical emergencies during mass-gatherings. The risk of violence, the size and mobility of the crowd, the type of event, weather, and duration of the event all influence the outcome. During the European Union (EU) Summit, from 15–16 June 2001 in Gothenburg, Sweden, approximately 50,000 people participated in 43 protest marches, some which included 15,000 participants. Clashes between police and the protesters occurred.

Objective:

The objective of this study was to analyze the amount and character of injuries as well as the medical complaints in relation to the EU Summit. In addition, the aim of this study was to describe the organization and function of the healthcare services provided during the meeting.

Methods:

This study is based on the medical records of patients presenting with injuries and other types of medical emergencies at the healthcare stations during the Summit.

Results:

In total, 143 patients sought medical care. Fifty-three (37.1%) were police officers. Most patients had minor complaints, but a few were seriously injured.The Patient Presentation Rate (PPR) was 2.7. Nine victims were hospitalized as high priority.

Conclusion:

The PPR for the EU Summit was 2.7, which is in the same range as previously reported from other mass-gatherings.

Analysis of Patient Load Data From the 2002 FIFA World Cup Korea/Japan

Introduction:

Past history of mass casualties related to international football games brought the importance of practical planning, preparedness, simulation training, and analysis of potential patient presentations to the forefront of emergency research.

Methods:

The Japanese Ministry of Health, Labor, and Welfare established the Health Research Team (HRT-MHLW) for the 2002 FIFA World Cup game (FIFAWC). The HRT-MHLW collected patient data related to the games and analyzed the related factors regarding patient presentations.

Results:

A total of 1,661 patients presented for evaluation and care from all 32 games in Japan. The patient presentation rate per 1,000 spectators per game was 1.21 and the transport-to-hospital rate was 0.05. The step-wise regression analysis identified that the patient presentations rate increased where access was difficult. As the number of total spectators increased, the patient presentation rate decreased. (p <0.0001, r = 0.823, r2 = 0.677).

Conclusion:

In order to develop mass-gathering medical-care plans in accordance with the types and sizes of mass gatherings, it is necessary to collect data and examine risk factors for patient presentations for a variety of events.

Development of an Equipment and Supply List for Emergency Medical Services Delivery at an Annual Air Show

Introduction:

Reports of medical care at mass gatherings reflect variability in mission and delivery models. Equipment recommendations are similarly varied. Thoughtful pre-planning and experience-based analysis are the best mechanisms for defining general and specific equipment recommendations.

Objective:

This report presents a suggested supply and equipment list developed over a six-year period of medical coverage at an air show, with an emphasis on the usage and cost of expendable supplies.

Methods:

The authors were involved in the planning for and execution of emergency medical care for a large, local, military air show on an annual basis, including provision of expendable medical supplies. A list of such supplies was developed over the initial two to three years, formalized and refined over the subsequent two years, and analyzed in the final, highest patient volume year of coverage. Detailed usage and cost was tracked over the final year for expendable supplies.

Results:

The results of this analysis indicate that comprehensive emergency medical care from first aid to mass casualty care can be offered at reasonable equipment and supply costs, if existing equipment resources can be supplemented by expendable supplies from a pre-determined list. Given the need for large quantities of supplies for a mass casualty contingency and the low likelihood of occurrence, a loan arrangement with a supplier, with return of unused supplies, is particularly convenient and economical. The approach used in this study should be appreciable in other similar settings. In concurrent scheduled events, the iterative process described can lead to greater specificity of needs for expendable supplies.

The Development of Conceptual Models for Mass-Gathering Health

Mass gatherings are an increasingly common feature of modern society. However, descriptive papers that focus on a single event or event type, dominate the literature, and, while these contribute to our understanding of the patient care required at such events, they do not provide an adequate analysis of the health effects of the mass-gathering phenomenon itself. This paper argues for the development of conceptual models and a research template for mass-gathering research. The development of theory and conceptual models would promote a better understanding of the health effects of mass gatherings. Two preliminary conceptual models are presented as a means to encourage further debate about the dominant influences on the health of people where crowds gather and to promote less superficial forms of analysis of the research data.

These conceptual models are based on the idea that mass-gathering health can be understood as an inter-relationship between three domains: (1) the biomedical; (2) the environmental; and (3) the psychosocial. Key features influence the rate of injury and illness and characterize each domain. These key features are more or less well-understood and combine to produce an effect—the patient presentation rate, and a response—the health plan. A new element, the latent potential for injury and illness, is introduced as a mechanism for describing a biomedical precursor state important in assessing health risk during mass gatherings.

Prehospital Emergency Care and Medical Preparedness for the 2005 World Championship Games in Athletics in Helsinki

Introduction:

International mass gatherings can cause great challenges to local healthcare system and emergency medical services (EMS). Traditionally, planning has been based on retrospective reports of previous events, but there still is a need for prospective studies in order to make the process more evidence-based. The aim of this study was to analyze the success of medical preparedness, ambulance patient characteristics, emergency care, and the use of pre-hospital resources during the 2005 World Championship Games in Athletics in Helsinki, Finland.

Methods:

The study was a prospective, observational study conducted within the Helsinki EMS. Data from all emergency calls at the sport venues and Games village between 05 and 14 August 2005 were collected. Data from the organizations responsible for the health care and first aid of spectators and accredited persons (e.g., athletes, coaches, the press, very important persons and personnel working in the Games area) also were collected. The Institutional Review Board of Helsinki University Central Hospital approved the study plan.

Results:

A total of 479,000 persons visited the Games. The ambulance call incidence at the Olympic Stadium was 0.50 per 10,000 people and 0.7 per 10,000 when the Games Village was included. The overall need for ambulance transportation to the emergency department was 0.52 per 10,000. No patients needed cardiopulmonary resuscitation or other immediate, life-saving procedures on-site. First aid was provided to 554 spectators (0.17per 10,000 people). The three medical organizations cared for 1,586 patients of which 25 (1.6%) were transported to a hospital by an ambulance. The number of patients needing transportation and the overall patient loadfor the healthcare system was well-anticipated. Accredited persons sought health care a total of 1,009 times.The number of patients treated was associated closely with the number of spectators (p = 0.05). The number of ambulance calls in the city increased 5.9 % as compared to the corresponding time period in the five previous years.

Conclusions:

The medical preparedness and resources for the Games proved to be sufficient. The EMS personnel were able to provide quality emergency care. This prospective study provided new, detailed data for the medical aspects of mass gatherings and confirmed many previous observations.

Mass-Gathering Medicine: A Review of the Evidence and Future Directions for Research

A review of mass-gathering medicine literature published by the Journal Prehospital and Disaster Medicine, demonstrates the progressive development of our knowledge and understanding of the health effects of mass gatherings and the strategies that appear to contribute positively to effective health services delivery during these events. In addition, the growing need for research that can underpin a more evidence-based approach to planning for and managing these events is apparent. The call for less descriptive and more critical and conceptual analyses has been increasing in volume and, it is argued, the challenge now is to apply research frameworks that can contribute more effectively to science-based, medical practice.

Variables Influencing Medical Usage Rates, Injury Patterns, and Levels of Care for Mass Gatherings

Objectives:

Mass gatherings create difficult environments for which to plan emergency medical responses. The purpose of this study was to identify those variables that are associated with increased medical usage rates (MURs) and certain injury patterns that can be used to facilitate the planning process.

Methods:

Patient information collected at three types of mass gatherings (professional American football and baseball games and rock concerts) over a three-year period was reviewed retrospectively. Specific variables were abstracted: (1) event type; (2) gender; (3) age; (4) weather; and (5) attendance. All 216 events (total attendance9,708,567) studied were held in the same metropolitan region. All MURs are reported as patients per 10,000 (PPTT).

Results:

The 5,899 patient encounters yielded a MUR of 6.1 PPTT. Patient encounters totaled 3,659 for baseball games (4.85 PPTT), 1,204 for football games (6.75 PPTT), and 1,036 for rock concerts (30 PPTT). The MUR for Location A concerts (no mosh pits) was 7.49 PPTT, whereas the MUR for the one Location B concert (with mosh pits) was110 PPTT. The MUR for Location A concerts was higher than for baseball, but not football games (p= 0.005). Gender distribution was equal among patrons seeking medical care. The mean values for patient ages were 29 years at baseball games, 33 years at football games, and 20 years at concerts. The MUR at events held when the apparent temperature was £80°F significantly lower statistically than that at events conducted at temperatures <80°F were (18°C) (4.90 vs. 8.10 PPTT (p= 0.005)). The occurrence of precipitation and increased attendance did not predict an increased MUR. Medical care was sought mostly for minor/basic-level care (84%) and less so for advanced-level care (16%). Medical cases occurred more often atsporting events (69%), and were more common than were cases with traumatic injuries (31%). Concerts with precipitation and rock concerts had a positive association withthe incidence of trauma and the incidence of injuries; whereas age and gender were not associated with medical or traumatic diagnoses.

Conclusions:

Event type and apparent temperature were the variables that best predicted MUR as well as specific injury patterns and levels of care.

Medical Care at Mass Gatherings: Emergency Medical Services at Large-Scale Rave Events

Objective: The objective of this study was to develop comprehensive guidelines for medical care during mass gatherings based on the experience of providing medical support during rave parties.

Methods: Study design was a prospective, observational study of self-referred patients who reported to First Aid Stations (FASs) during Dutch rave parties. All users of medical care were registered on an existing standard questionnaire. Health problems were categorized as medical, trauma, psychological, or miscellaneous. Severity was assessed based on the Emergency Severity Index. Qualified nurses, paramedics, and doctors conducted the study after training in the use of the study questionnaire. Total number of visitors was reported by type of event.

Results: During the 2006–2010 study period, 7,089 persons presented to FASs for medical aid during rave parties. Most of the problems (91.1%) were categorized as medical or trauma, and classified as mild. The most common medical complaints were general unwell-being, nausea, dizziness, and vomiting. Contusions, strains and sprains, wounds, lacerations, and blisters were the most common traumas. A small portion (2.4%) of the emergency aid was classified as moderate (professional medical care required), including two cases (0.03%) that were considered life-threatening. Hospital admission occurred in 2.2% of the patients. Fewer than half of all patients presenting for aid were transported by ambulance. More than a quarter of all cases (27.4%) were related to recreational drugs.

Conclusions: During a five-year field research period at rave dance parties, most presentations on-site for medical evaluation were for mild conditions. A medical team of six healthcare workers for every 10,000 rave party visitors is recommended. On-site medical staff should consist primarily of first aid providers, along with nurses who have event-specific training on advanced life support, event-specific injuries and incidents, health education related to self-care deficits, interventions for psychological distress, infection control, and disaster medicine. Protocols should be available for treating common injuries and other minor medical problems, and for registration, triage, environmental surveillance and catastrophe management and response.