Emergency department surveillance: an examination of issues and a proposal for a national strategy

Surveillance of COVID-19 Using Geospatial Data: An Emergency Department Perspective

Background

The outbreak of coronavirus 2019 (COVID-19) which emerged in December 2019 spread rapidly and created a public health emergency. Geospatial records of case data are needed in real time to monitor and anticipate the spread of infection.

Methods

This study aimed to identify the emerging hotspots of COVID-19 using a geographic information system (GIS)-based approach. Data of laboratory-confirmed COVID-19 patients from March 15 to June 12, 2020, who visited the emergency department of a tertiary specialized academic hospital in Dubai were evaluated using ArcGIS Pro 2.5. Spatiotemporal analysis, including optimized hotspot analysis, was performed at the community level.

Results

The cases were spatially concentrated mostly over the inner city of Dubai. Moreover, the optimized hotspot analysis showed statistically significant hotspots (p < 0.01) in the north of Dubai. Waxing and waning hotspots were also observed in the southern and central regions of Dubai. Finally, there were nonsustaining hotspots in communities with a very low population density.

Conclusion

This study identified hotspots of COVID-19 using geospatial analysis. It is simple and can be easily reproduced to identify disease outbreaks. In the future, more attention is needed in creating a wider geodatabase and identifying hotspots with more intense transmission intensity.

The Pakistan National Emergency Department Surveillance Study (Pak-NEDS): Introducing a pilot surveillance

BACKGROUND

Evidence-based decision making is essential for appropriate prioritization and service provision by healthcare systems. Despite higher demands, data needs for this practice are not met in many cases in low- and middle-income countries because of underdeveloped sources, among other reasons. Emergency departments (EDs) provide an important channel for such information because of their strategic position within healthcare systems. This paper describes the design and pilot test of a national ED based surveillance system suitable for the Pakistani context.

METHODS

The Pakistan National Emergency Department Surveillance Study (Pak-NEDS) was pilot tested in the emergency departments of seven major tertiary healthcare centres across the country. The Aga Khan University, Karachi, served as the coordinating centre. Key stakeholders and experts from all study institutes were involved in outlining data needs, development of the study questionnaire, and identification of appropriate surveillance mechanisms such as methods for data collection, monitoring, and quality assurance procedures. The surveillance system was operational between November 2010 and March 2011. Active surveillance was done 24 hours a day by data collectors hired and trained specifically for the study. All patients presenting to the study EDs were eligible participants. Over 270,000 cases were registered in the surveillance system over a period of four months. Coverage levels in the final month ranged from 91-100% and were highest in centres with the least volume of patients. Overall the coverage for the four months was 79% and crude operational costs were less than $0.20 per patient.

CONCLUSIONS

Pak-NEDS is the first multi-centre ED based surveillance system successfully piloted in a sample of major EDs having some of the highest patient volumes in Pakistan. Despite the challenges identified, our pilot shows that the system is flexible and scalable, and could potentially be adapted for many other low- and middle-income settings.

California emergency department visit rates for medical conditions increased while visit rates for injuries fell, 2005-11

The emergency department (ED) is the source of most hospital admissions; provides care for patients with no other point of access to the health care system; receives advanced care referrals from primary care physicians; and provides surveillance data on injuries, infectious diseases, violence, and adverse drug events. Understanding the changes in the profile of disease in the ED can inform emergency services administration and planning and can provide insight into the public's health. We analyzed the trends in the diagnoses seen in California EDs from 2005 to 2011, finding that while the ED visit rate for injuries decreased by 0.7 percent, the rate of ED visits for noninjury diagnoses rose 13.4 percent. We also found a rise in symptom-related diagnoses, such as abdominal pain, along with nervous system disorders, gastrointestinal disease, and mental illness. These trends point out the increasing importance of EDs in providing care for complex medical cases, as well as the changing nature of illness in the population needing immediate medical attention.

Defining an ideal system to establish the incidence of inflicted traumatic brain injury: summary of the consensus conference

A conference addressing how to establish the incidence of inflicted traumatic brain injury in young children provided the opportunity to examine issues of definitions, passive versus active surveillance, study designs, proxy measures, and statistical issues. Data were presented that had been collected in alternative ways. The participants concluded that an ideal system for measurement of the incidence does not yet exist. A new surveillance system will take a significant amount of time and money to establish. Such a system will require a combination of ascertainment approaches, attention to case finding, a large population, careful attention to coding and data quality. The ethical issues involved in measuring stigmatized and illegal behavior are not inconsequential. In an ideal system data from different sources-medical, legal, and social service, among others-will need to be linked. Perhaps most importantly, any surveillance approach will need to be maintained so that trend data can be used to assess the effectiveness of prevention efforts.

Health promotion and disease prevention in the emergency department

This article provides an overview of health promotion and disease and injury prevention concepts. It provides an emergency medicine perspective and reviews approaches that can be used in the emergency department. It discusses examples of innovative emergency medicine-based preventive activities including prevention in the prehospital setting. This article ends with a discussion of the importance of a system approach to prevention and suggests a role for a preventionist as a new member of the emergency medicine team.

The future of emergency medicine public health research

This chapter addresses past successes and challenges and then elaborates on the potential for further advances in three areas that bridge emergency medicine and the broader public health and health services research agenda: (1) monitoring health care access; (2) surveillance of diseases, injuries, and health risks; and (3) delivering clinical preventive services. This article also suggests ways to advance policy-relevant research on systems of health and social welfare that impact the health of the public.

Epidemiology of a pediatric emergency medicine research network: the PECARN Core Data Project

OBJECTIVE

To examine the epidemiology of pediatric patient visits to emergency departments (ED).

METHODS

We conducted a cross-sectional study of pediatric ED visits at the participating Pediatric Emergency Care Applied Research Network (PECARN) hospitals in 2002. We provide descriptive characteristics of pediatric ED visits and a comparison of the study database to the National Hospital Ambulatory Medical Care Survey (NHAMCS). Bivariate analyses were calculated to assess characteristics associated with hospital admission, death in the ED, and length of ED visit. We also performed multivariate regression to model the likelihood of admission to the hospital.

RESULTS

Mean patient age was 6.2 years; 53.5% were boys; 47.5% black; and 43.2% had Medicaid insurance. The most common ED diagnoses were fever, upper respiratory infection, asthma, otitis media, and viral syndromes. The inpatient admission rate was 11.6%. The most common diagnoses requiring hospitalization were asthma, dehydration, fever, bronchiolitis, and pneumonia. In multivariate analysis, patients who were black or Hispanic, had Medicaid insurance or were uninsured, or were older than 1 year were less likely to be hospitalized. Demographics of the PECARN population were similar to NHAMCS, with notable exceptions of a larger proportion of black patients and of admitted patients from the PECARN EDs.

CONCLUSION

We describe previously unavailable epidemiological information about childhood illnesses and injuries that can inform development of future studies on the effectiveness, outcomes, and quality of emergency medical services for children. Most pediatric ED patients in our study sought care for infectious causes or asthma and were discharged from the ED. Hospital admission rate differed according to age, payer type, race/ethnicity, and diagnosis.

Modeling emergency department visit patterns for infectious disease complaints: results and application to disease surveillance

BACKGROUND

Concern over bio-terrorism has led to recognition that traditional public health surveillance for specific conditions is unlikely to provide timely indication of some disease outbreaks, either naturally occurring or induced by a bioweapon. In non-traditional surveillance, the use of health care resources are monitored in "near real" time for the first signs of an outbreak, such as increases in emergency department (ED) visits for respiratory, gastrointestinal or neurological chief complaints (CC).

METHODS

We collected ED CCs from 2/1/94 - 5/31/02 as a training set. A first-order model was developed for each of seven CC categories by accounting for long-term, day-of-week, and seasonal effects. We assessed predictive performance on subsequent data from 6/1/02 - 5/31/03, compared CC counts to predictions and confidence limits, and identified anomalies (simulated and real).

RESULTS

Each CC category exhibited significant day-of-week differences. For most categories, counts peaked on Monday. There were seasonal cycles in both respiratory and undifferentiated infection complaints and the season-to-season variability in peak date was summarized using a hierarchical model. For example, the average peak date for respiratory complaints was January 22, with a season-to-season standard deviation of 12 days. This season-to-season variation makes it challenging to predict respiratory CCs so we focused our effort and discussion on prediction performance for this difficult category. Total ED visits increased over the study period by 4%, but respiratory complaints decreased by roughly 20%, illustrating that long-term averages in the data set need not reflect future behavior in data subsets.

CONCLUSION

We found that ED CCs provided timely indicators for outbreaks. Our approach led to successful identification of a respiratory outbreak one-to-two weeks in advance of reports from the state-wide sentinel flu surveillance and of a reported increase in positive laboratory test results.

A local department of public health and the geospatial data infrastructure

Local health departments (LHD) are the most widely distributed aspect of the United States public health infrastructure. The role of LHDs has changed since the terrorist attacks of September 11, 2001, and an increased concern about bioterrorism. This concern resulted in more emphasis on disease surveillance and the need for new institutional linkages of LHDs with other entities for effective response. These changes coincide with technological changes in spatial data integration and the growth of medical informatics in public health. The integration of GIS into the daily work of an LHD holds promise of improving not only bioterrorism response capabilities, but also the management of emerging infectious diseases, such as West Nile Virus or food borne illness, as well as longstanding programs focused on nutrition and safety. Still, the impediments to using GIS at an LHD remain strong as funding decisions and a complex technology continue to challenge implementation efforts.

Using nurses’ natural language entries to build a concept-oriented terminology for patients’ chief complaints in the emergency department

Information about the chief complaint (CC), also known as the patient's reason for seeking emergency care, is critical for patient prioritization for treatment and determination of patient flow through the emergency department (ED). Triage nurses document the CC at the start of the ED visit, and the data are increasingly available in electronic form. Despite the clinical and operational significance of the CC to the ED, there is no standard CC terminology. We propose the construction of concept-oriented nursing terminologies from the actual language used by experts. We use text analysis to extract CC concepts from triage nurses' natural language entries. Our methodology for building the nursing terminology utilizes natural language processing techniques and the Unified Medical Language System.

Child bicyclist injuries: are we obtaining enough information in the emergency department chart?

OBJECTIVE

The purpose of this study was to assess the range of information relevant to bicyclist injury research that is available on routinely completed emergency department medical records.

METHODS

A retrospective chart review of emergency department medical records was conducted on children who were injured as bicyclists and treated at an urban level I pediatric trauma center. A range of variables relevant to bicyclist injury research and prevention was developed and organized according to the Haddon matrix. Routinely completed free text emergency department medical records were assessed for the presence of each of the targeted elements. In addition, medical records of seriously injured patients (for whom a more structured medical record is routinely used) were compared to free form records of less seriously injured patients to identify differences in documentation that may be related to the structure of the medical record.

RESULTS

Information related to previous medical history (96% of records), diagnosis (89%), documentation of pre-hospital care (82%), and child traumatic contact points (81%) were documented in the majority of medical records. Information relevant to prevention efforts was less commonly documented: identification of motor vehicle/object involved in crash (58%), the precipitating event (24%), the location of the crash (23%), and documentation of helmet use (23%). Records of seriously injured patients demonstrated significantly higher documentation rates for pre-hospital care and child traumatic contact points, and significantly lower documentation rates for previous medical history, child kinematics, main body parts impacted, and location of injury event.

CONCLUSIONS

Routinely completed free text emergency department medical records contain limited information that could be used by injury researchers in effective surveillance. In particular information relating to the circumstances of the crash event that might be used to design or target prevention efforts is typically lacking. Routine use of more structured medical records has the potential to improve documentation of key information.

Description of Missouri children who suffer burn injuries

OBJECTIVE

This study uses Missouri's inpatient and outpatient E code data system to describe the demographic characteristics of Missouri children who suffered burn injuries during 1994 and 1995.

METHODS

Retrospective review of Missouri E code data.

RESULTS

Altogether 8,404 children aged 0-14 years were treated for burn injuries in Missouri hospitals during 1994 and 1995. The rate of burn injury in Missouri children was 339 per 100,000/year. African-American boys 0-4 years living in urban counties were at increased risk. In addition, African-American girls ages 0-4 years living in counties with a high poverty rate had raised burn injury rates. Burns from hot objects and scalds from hot liquids caused more than half of the burns.

CONCLUSIONS

Hospital based E coding has proven an invaluable tool for the study of burns and will, no doubt, prove equally useful for other injuries.

Preventive care in the emergency department, Part I: Clinical preventive services--are they relevant to emergency medicine? Society for Academic Emergency Medicine Public Health and Education Task Force Preventive Services Work Group

In 1998 the Society for Academic Emergency Medicine's (SAEM's) Board of Directors asked the SAEM Public Health and Education Task Force to develop recommendations for prevention, screening, and counseling activities to be conducted in emergency departments (EDs). The Task Force's work was divided into two phases: 1) a discussion of the rationale for preventive services in the ED, along with generation of a preliminary list of prevention activities that could be studied for ED implementation; and 2) a formal evidence-based review of topics chosen from the preliminary list, along with recommendations for ED implementation and further study. This paper represents Phase I of the project. Phase II, the formal evidence-based review and recommendations, is published separately in this issue.

Injury surveillance in a pediatric emergency department

In this study we have tried to determine physician success in the collection of injury data during the emergency department visit. Prospective data were collected from all children between the ages of 0 to 18 treated for an injury. Data were collected at the time of the visit and by chart review the next day. At an urban, university-affiliated, children's hospital, data were collected on 2,156 injured children. Fifty-one percent of the data forms were completed by the treating physician. Physician completion rate was lower on the weekends (46%) than on weekdays (52%, P = .02). The most common mechanisms of injury were falls (34%), motor-vehicle crashes or pedestrians struck (13%), and nonintentional struck by blunt object (12%). The most common mechanism of injury in all age groups was falls. Our results demonstrate that emergency physicians are not successful data collectors. However, when physician data collection is combined with next-day review of patient records, virtually 100% of patients are captured. Active emergency department data collection is important because in contrast to studies which use hospital discharge and mortality data, we found that overall falls account for more injuries presenting to the ED than transportation-related causes. An active surveillance system in emergency departments that does not require extra work on the part of the treating physician would be ideal and may give a more comprehensive description of the scope of the injury problem.

Behavioral risk factors in emergency department patients: a multisite survey

BACKGROUND

Many people rely on EDs for routine health care. Often, however, screening and counseling for health risks are not provided.

OBJECTIVE

To determine prevalence rates of chronic disease and injury risk factors and access to routine health care in a random sample of ED patients in 3 cities.

METHODS

A prospective survey was conducted at 3 hospital EDs in Akron, OH, Boston, MA, and Denver, CO. A modified version of the national Behavioral Risk Factor Surveillance Survey was administered by trained researchers to a convenience sample of non-critically ill patients during randomly selected shifts.

RESULTS

Of 1,143 eligible patients, 923 (81%) agreed to participate. Their mean age was 39 (range = 17-96) years. Most were female (58%), white (60%), and unmarried (68%). Thirty-eight percent had no access to primary care. Injury-prone behaviors were prevalent: 53% of the respondents did not wear seat belts regularly; 15% had no working smoke detector; 3% kept loaded, unlocked handguns in their homes; 11% had attempted suicide; 23% had a positive CAGE screen for alcoholism; 3% had operated a motor vehicle in the preceding month while alcohol-intoxicated; and 11% had ridden in an automobile with an intoxicated driver. Cancer and chronic disease risks were also common: 48% smoked; 16% had not received a blood pressure check in the preceding year; and 4% reported unsafe sexual practices. Among women aged > 50 years, 42% had not received a Pap test in the prior 2 years and 14% had never had mammography. Many prevalence rates and access to care varied among the 3 sites. However, for most risk factors, prevalence rates did not differ in patients with and without access to primary health care.

CONCLUSIONS

ED patients have high rates of injury and chronic disease risks, and many have no other source of routine health care. Research is needed to determine whether ED-based programs, designed to reduce injury and chronic disease risks, are feasible and cost-effective.

Trends in nonfatal and fatal firearm-related injury rates in the United States, 1985-1995

STUDY OBJECTIVE

To characterize trends in annual estimates of nonfatal firearm-related injuries treated in US hospital emergency departments and to compare trends in quarterly rates of such injuries with those of firearm-related fatalities in the US population.

METHODS

Data on nonfatal firearm-related injuries were obtained from the National Electronic Injury Surveillance System (NEISS) by review of medical records for June 1, 1992, through May 31, 1995. Data on firearm-related fatalities were obtained from the National Vital Statistics System for January 1, 1985, through December 31, 1995. NEISS comprises 91 hospitals that represent a stratified probability sample of all hospitals in the United States and its territories that have at least six beds and provide 24-hour emergency service. The main outcome measures were numbers, percentages, and quarterly population rates for nonfatal and fatal firearm-related injuries.

RESULTS

An estimated 288,538 nonfatal firearm-related injuries (95% confidence interval [CI], 169,776 to 407,300) were treated in EDs during the 3-year study period. The annual number of non-fatal firearm-related injuries increased from 99,025 for June 1992 through May 1993 (95% CI, 58,266 to 139,784) to 101,669 for June 1993 through May 1994 (95% CI, 59,822 to 143,516), then decreased to 87,844 for June 1994 through May 1995 (95% CI, 51,687 to 124,001). Before the third quarter of 1993, quarterly nonfatal and fatal firearm-related injury rates in the total US population and quarterly nonfatal firearm assaultive injury and firearm homicide rates for males aged 15 to 24 years were observed to be on the rise. Since then, these rates have significantly declined.

CONCLUSION

Analysis of national trends indicates that non-fatal and fatal firearm-related injuries are declining in the United States, although the rate of firearm-related deaths remains high, especially among males aged 15 to 24 years, in relation to other leading causes of injury death. An assessment of factors responsible for the decline in firearm-related injuries is needed to design further prevention efforts.

Disease surveillance in the ED: factors leading to the underreporting of gonorrhea

Emergency departments (EDs) are potentially important surveillance sites. This study assessed reporting completeness for gonorrhea by hospital and gender and explored reasons for underreporting. A retrospective review was conducted of ED charts from three hospitals for 2 months. Potential gonorrhea cases were identified by history, physical examination, testing, treatment, and diagnostic practices. Cases were divided into those tested only, those treated with or without testing, and those with positive tests. Reporting completeness was assessed for each. Of 936 cases included, 29.0% were tested without treatment and 71% received treatment. One third of treated patients were not tested, and none of these were reported. Two EDs reported cases themselves and reported 75.9% of confirmed cases. There were significant differences in testing and reporting between hospitals and genders. Underreporting of suspected and confirmed gonorrhea cases was common from these EDs. A major cause was physicians treating without testing for confirmation.

Collaboration in emergency medicine research: a consensus statement

The role of collaboration in medical research and how it applies to emergency medicine research are discussed. The guidance of the Division of Health Sciences Policy of the Institute of Medicine is reviewed. Application of the principles of collaborative efforts and recognition of each individual's contribution are overviewed. Emergency physicians can and should be invaluable contributors to collaborative research. Collaborative research relationships, whether established at individual institutions or through national clinical trials, must be developed deliberately. The specialty of emergency medicine must take the necessary commitment of time and resources to ensure that these occur.

Collaboration in emergency medicine research: a consensus statement

The role of collaboration in medical research and how it applies to emergency medicine (EM) research are discussed. The guidance of the Division of Health Sciences Policy of the Institute of Medicine is reviewed. Application of the principles of collaborative efforts and recognition of each individual's contribution are overviewed. Emergency physicians can and should be invaluable contributors to collaborative research. Collaborative research relationships, whether established at individual institutions or through national clinical trials, must be developed deliberately. The specialty of EM must make the necessary commitment of time and resources to ensure that these occur.

A truncated E-code system for injury surveillance in the emergency department: description and clinometric testing

OBJECTIVES

ED injury surveillance requires accurate information about mechanism. This study explored the clinometric properties of an E-code system specifically designed to track ED injuries.

METHODS

All patients assessed in the ED had cause-of-injury information documented using a truncated E-code system. Patient records were hand-searched to determine coding compliance. A selection of 98 charts (50 injury/48 noninjury) were coded by 7 physicians, 2 nurses, and 2 nosologists. Agreements (interrater and intrarater) on the diagnosis of trauma and exact E-codes were determined (using kappa; kappa).

RESULTS

E-coding compliance was high (overall 90%: 95% CI: 85-93%), and accuracy of injury classification was 99%. Compared with an expert's coding, agreement on injury classification was excellent for physicians (kappa = 0.91; 95% CI: 0.80-1.0), nurses (kappa = 0.88; 95% CI: 0.75-1.0), and nosologists (kappa = 0.92; 95% CI: 0.81-1.0). Agreement was substantial for the exact E-codes between physicians (kappa = 0.77; 95% CI: 0.60-0.94) and nurses (kappa = 0.72; 95% CI: 0.54-0.90). Recode reliability was also excellent for physicians (kappa = 0.88; 95% CI: 0.75-1.0) and nurses (kappa = 0.96; 95% CI: 0.88-1.0).

CONCLUSIONS

Injury coding using a truncated E-code system can provide valid and reliable data from the ED. Differences between nurses, physicians, and nosologists in the ability to accurately code using this system were minimal, thus eliminating the need for additional staff and resources.

A population-based study of fatal and nonfatal firearm-related injuries

OBJECTIVE

To determine population-based firearm-related morbidity and mortality for Allegheny County, PA (population = 1.3 million), for the year 1994.

METHODS

Fatalities were identified from a review of death certificates. To identify nonfatal cases, an active surveillance was conducted at all 24 acute care EDs in the county. The ED surveillance used 2 existing sources of case identification from each hospital to minimize undercount.

RESULTS

Firearms were the leading cause of injury death to county residents, accounting for 155 deaths. The crude mortality rate from firearms was 11.7/100,000. Black males aged 15-19 years were most at risk for a firearm fatality (293/100,000). There were 514 nonfatal firearm injuries, producing a case fatality rate of 23%. The highest age-specific rate for nonfatal firearm-related injuries treated in the county EDs was observed for black males aged 15-19 years (2,245/100,000), which is 58 times higher than the firearm-related injury rate for the entire county population (38.7/100,000).

CONCLUSION

Firearm-related injury and death are a significant public health problem in Allegheny County. Although the crude mortality rate from firearms in the county is lower than the reported national rate, the observed rate for nonfatal injuries in the black youth of this community is the highest firearm injury incidence rate ever reported. Local surveillance of firearm-related injuries, including nonfatal events, is needed to more accurately demonstrate the magnitude of this problem.

Work-related injuries in a rural emergency department population

OBJECTIVE

To describe the spectrum of work-related injury evaluated in a rural ED population.

METHODS

An ED-based injury surveillance system (EDBISS) was used to collect injury data for all ED patients seen over a 1-year period. A patient was classified as injured if his or her record contained an ED log injury code, an ICD-9 N-code between 800 and 995 in any diagnostic field, an E-code, or an entry in the trauma registry. An injury was considered work-related if the patient reported that the injury had occurred while at work.

RESULTS

Work-related injuries accounted for 1,539/12,321 (12.5%) of all injuries. The mean age of patients injured on the job was 33.8 years (range, 16-77 years), compared with a mean age of 27.7 years for all the injured patients. Males accounted for 1,026/1,537 (67%) of the work-related injury visits, compared with 57% of all the injury visits. The most common mechanisms of work-related injuries were: overexertion (313; 20%); cut or pierced by sharp implements (248; 16%); falls (250; 16%); struck by object (202; 13%); and transportation-related injuries (71; 5%). Sprains and strains were the most common type of injury sustained (415; 27%), followed by wounds to upper limbs (283; 18%), contusions (182; 12%), and fractures (151; 10%). Of the 1,539 patients presenting with occupational injuries, 178 (12%) presented to the ED via ambulance. Most (1,401; 91%) were treated and released from the ED, with the remainder (136; 9%) hospitalized. The mechanisms of injury that most commonly resulted in hospitalization included struck by an object (28; 21%), transportation (26; 19%), falls (27; 20%), crushing mechanism (13; 10%), and machinery (20; 15%). Of those requiring hospitalization, 132/136 (97)% were male, and the average length of stay was 4.4 days. Four of the hospitalized persons died of their work-related injuries. Known medical charges incurred by patients injured at work were as high as $62,622. The average charge for those treated and released was $273; the average charge for those who required hospitalization was $10,910.

CONCLUSIONS

Occupational injuries contribute significantly to the overall incidence of injuries seen in this ED and are responsible for significant medical charges each year.

The potential of using billing data for emergency department injury surveillance

OBJECTIVE

To determine the availability of and sample statewide ED injury information obtained from hospital billing data for the purpose of demonstrating the feasibility of information acquisition for subsequent data linkage.

METHODS

A retrospective, database investigation was conducted to obtain data describing a statewide stratified sample of ED patients. The aim was to collect a computerized billing summary record for each injured ED patient seen at each sampled hospital over a 1-year period. All 215 Pennsylvania acute care hospitals in 1991 were eligible for sample selection. Data collection for the project was conducted in 1993. Participants included directors of hospital medical records and billing departments.

RESULTS

Twenty-four hospitals contributed data sets from the original target goal of 31 strata. The final combined data set contained 187,404 records with injury diagnoses from approximately 616,000 ED patient visits, representing a 12% sample of all annual statewide ED visits. Age, sex, date of visit, and primary diagnosis fields were completed from the retrieved data > 99% of the time. More than two-thirds of the sampled records had a social security number, and total charges were recorded > 90% of the time. Other variables such as name and address were contained in < 50% of the records submitted. E-codes were usually not available.

CONCLUSIONS

Retrospective compilation of multihospital ED billing data to create a statewide ED data sample-with the potential for injury research and probabilistic database linkage-can be accomplished; there are, however, important limitations.

Injury surveillance: a statewide survey of emergency department data collection practices

STUDY OBJECTIVE

To assess current emergency department data collection practices in Pennsylvania and determine whether existing data sources can be used as part of a statewide injury surveillance system.

METHODS

Separate survey questionnaires requesting information on current ED patient data collection practices and attitudes were mailed to all directors of medical records, billing, and EDs in Pennsylvania (N = 212).

RESULTS

Of the medical records department respondents, 92% indicated that ED registration data are retained in a computerized information system; 94% of respondents from billing departments reported that their ED patient registration system is integrated with an ED billing system. A total of 36% of EDs surveyed use a computerized ED patient logbook, and another 27% plan to begin a computerized log within 2 years. Dictation and transcription services that permit electronic retrieval of text are being used by 26% of EDs for patient medical records.

CONCLUSION

Many elements for building a statewide ED injury surveillance system are in place in Pennsylvania, but they are as yet incomplete. Future studies should examine the feasibility of integrating existing ED data systems into statewide injury surveillance systems.

Preventing recurring injuries from violence: the risk of assault among Cleveland youth after hospitalization

OBJECTIVES

Although interpersonal violence has increased among urban youth, its epidemiology remains unclear. To prevent such violence, identifying the susceptible population is important.

METHODS

Medical records for 998 patients aged 5 to 25 years at an urban hospital were reviewed to compare data for patients admitted for assault-related injuries, those admitted for unintentional injuries, and those for problems other than injuries.

RESULTS

Those initially admitted for treatment of assault were found to be at greater risk of subsequent treatment for assault than those admitted for noninjuries.

CONCLUSIONS

Admission for injuries caused by violence may increase risk for future assaults; hospitalization may offer an opportunity to interrupt these patterns.

Injury in West Virginia: a statewide survey

OBJECTIVE

To determine an estimate of the period prevalence of medically attended injury in West Virginia via a statewide random telephone survey.

METHODS

A statewide random telephone survey, the West Virginia Social Indicator Survey (WVSIS), was modified to incorporate questions regarding the incidence and mechanisms of injury. The WVSIS is periodically conducted on a representative cross-section of West Virginians to gather information about their social and economic conditions as well as to monitor change in the quality of their lives over time.

RESULTS

Of the 1,498 households interviewed, 412 (28%) reported having sustained injuries for which medical care had been obtained. This translates to a conservative estimate of 231,000 medically attended injuries within West Virginia in 1993. The average age of those injured was 35 years. Falls were the most frequently reported causes of injury, with motor vehicle crashes being the second most reported cause. Most injury victims (70%) were treated in an ED. Most respondents (67%) were able to suggest ways in which the injuries might have been avoided. Only 37% of the respondents with children < 13 years of age reported ever having received injury prevention information from a physician. The most commonly reported physician advice concerned childhood poisoning (34%).

CONCLUSIONS

Injury questions added to ongoing state health surveillance surveys provide valuable insight into population-based injury rates and potential preventive measures.

Emergency department utilization by the elderly: analysis of the National Hospital Ambulatory Medical Care Survey

OBJECTIVE

To characterize the ED utilization patterns of the elderly population using nationally representative data.

METHODS

A secondary analysis was performed using the National Hospital Ambulatory Medical Care Survey (NHAMCS), a nationwide, stratified probability sample of ED encounters. Using these physician-reported data, the demographics, patient complaints, physician diagnoses, and dispositions were compared by age group, i.e., young-old (age 65-84 years) vs old-old (age > or = 85 years).

RESULTS

The elderly (age > or = 65 years) represented 5,038 (19.6%) of 25,646 ED encounters for all adults (age > or = 18 years). The geriatric age groups (ages 65-74, 75-84, and > or = 85 years) accounted for 45.3%, 37.4%, and 17.2% of all the encounters by the elderly. The proportions of female patients and white patients were higher with increasing age. The proportion of elderly patients hospitalized was 4 times that of younger adults and reflected monotonic increase with increasing age among elders. Patient complaints and physician diagnoses were generally similar for the young-old (65-84 years) and the old-old (> or = 85 years).

CONCLUSIONS

These findings are consistent with previous single-center studies of geriatric ED patients. This data source may be useful for investigation of clinical issues related to the care of elderly ED patients.

Development of an emergency department-based injury surveillance system

STUDY OBJECTIVE

To describe the development of an emergency department-based injury surveillance system, to describe the problems encountered, and to briefly describe the data output and potential applications.

METHODS

Within our university-based hospital system and Level I trauma center register, injury data currently exist on all ED patients. Over a 1-year period, these data sets were linked with our ED log using the hospital identification number and date of service as the key merge variables. Elements in our data set included demographic information, ED-related variables, and codes for nature of injury and circumstances of injury. Data files for 1 month were inspected manually to validate the success of the merger. Problems encountered in developing the system were summarized.

RESULTS

A manual review of 1 month of data files from our hospital system, trauma register, and ED log revealed that the records of more than 97% (2,802) of 2,878 injury patients seen in our ED had additional data attached after the merger. No errors of commission were found, but errors of omission occurred. The barriers that were encountered during the development of this injury surveillance system are described.

CONCLUSION

Hospital data can be linked to the ED log to create an injury surveillance system that captures valuable information on patients admitted and discharged from the ED.

HIV seroprevalence in emergency department patients: Portland, Oregon, 1988-1991

OBJECTIVES

In Portland, OR: 1) to determine the changes in HIV seroprevalence for ED patients from 1988 to 1991, 2) to define the characteristics of the HIV-positive ED patient, 3) to determine the hepatitis B seroprevalence of HIV-seropositive ED patients, and 4) to demonstrate the feasibility of an ED population-based surveillance investigation.

METHODS

A prospective, multiyear observational, cross-sectional, multicenter, population-based seroprevalence study was performed using seven urban hospital EDs. Serologic testing for HIV and hepatitis B was performed on excess blood obtained from ED patients. Four sampling periods were used at each hospital at 14-month intervals starting June 1988 and ending December 1991. The blood specimens were obtained concurrently at all the participating hospitals.

RESULTS

Of 1,681 patients, 17 (1.0%) were HIV-positive. The HIV seroprevalence rate was relatively stable over time: 0.5% (2/444) in 1988, 1.7% (7/396) in 1989, 1% (3/296) in 1990, and 0.9% (5/545) in 1991. Most (94%) HIV patients were men, 100% were white, 81% were > or = 30 years old. Most (59%) of the HIV-positive patients also were positive for hepatitis B core antibody. Many (76%) of the HIV-positive patients were known to be positive by the emergency health care worker.

CONCLUSION

HIV seroprevalence among the ED patients in Portland, OR, was generally stable from 1988 to 1991. Many HIV-positive patients also were hepatitis B-positive, thus representing a double occupational infectious disease risk to ED personnel. A significant minority (24%) of the HIV-positive patients were not known to be HIV-positive by the ED personnel. Universal precautions and hepatitis B immunization are paramount for reducing the risk of infectious disease due to exposure to body fluids.