Emergency Department Visit Volume Research Articles

Receiving home care forms and the risk for emergency department visits in community-dwelling Dutch older adults, a retrospective cohort study using national data

BackgroundOlder adults receiving home care have a higher risk of visiting the emergency department (ED) than community-dwelling older adults not receiving home care. This may result from a higher incidence of comorbidities and reduced functional autonomy in home care recipients. Since people receive different types of home care because of their different comorbidities and autonomy profiles, it is possible that distinguishing between the form of home care can help identify subpopulations with different risks for ED visits and help develop targeted interventions. This study aimed to compare the risk of visiting the ED in older adults receiving different forms of home care with those living at home without receiving home care in a national cohort in one year.MethodsA retrospective cohort study using claims data collected in 2019 on the Dutch population aged ≥ 65 years (N = 3,314,440) was conducted. Participants were classified as follows: no claimed home care (NO), household help (HH), personal care (PC), HH + PC, and nursing home care at home (NHH). The primary outcome was the number of individuals that visited the ED. Secondary outcomes were the number of individuals whose home care changed, who were institutionalized, or who died. Exploratory logistic regression was applied.ResultsThere were 2,758,093 adults in the NO group, 131,260 in the HH group, 154,462 in the PC group, 96,526 in the HH + PC group, and 34,612 in the NHH group. More ED visits were observed in the home care groups than in the NO group, and this risk increased to more than two-fold for the PC groups. There was a significant change to a more intensive form of home care, institutionalization, or death in all groups.ConclusionsDistinguishing between the form of home care older adults receive identifies subpopulations with different risks for ED visits compared with community-dwelling older adults not receiving home care on a population level. Home care transitions are frequent and mostly involve more intensive care or death. Although older adults not receiving home care have a lower risk of ED visits, they contribute most to the absolute volume of ED visits.

Community Emergency Care Use by Veterans in an Era of Expanding Choice

Recently passed legislation aimed at improving access to care has considerably expanded options for veterans to receive emergency care in community, or non-Veterans Affairs (VA) settings. However, national trends in community emergency department (ED) use by veterans are unknown. To examine national, temporal trends in the frequencies and types of ED visits provided in community settings and explore the association between facilities' purchase of community care with facility and regional characteristics. Retrospective, observational cross-sectional study of ED visits over fiscal years (FY) 2016 to 2022. VA and community ED encounter data were obtained from the VA Corporate Data Warehouse and the Office of Integrated Veteran Care. Participants were veterans receiving ED care at VA facilities or paid for by the VA in the community. Data were analyzed from June to September 2023. The primary outcome measures included community ED visit volume, disposition, and payments over time. Also, the most common and costly ED visits were assessed. Negative binomial regression analysis examined associations between facility and regional characteristics and the rate of ED visits purchased in community settings relative to all ED visits. There were 19 787 056 ED visits, predominantly at VA facilities (14 532 261 visits [73.4%]), made by 3 972 503 unique veterans from FY 2016 to 2022. The majority of ED users were male (3 576 120 individuals [90.0%]), and the median (IQR) age was 63 (48-73) years. The proportion of community ED visits increased in absolute terms from 18% in FY 2016 to 37% in FY 2022. Total community ED payments, adjusted to 2021 dollars, were $1.18 billion in FY 2016 and over $6.14 billion in FY 2022. The most common reasons for ED visits in the community were for nonspecific chest pain (305 082 visits [6%]), abdominal pain (174 836 visits [3%]), and septicemia (149 968 visits [3%]). The average proportion of ED visits purchased by a VA facility increased from 14% in FY 2016 to 32% by FY 2022. In multivariable analyses, facilities with greater ED volume and low-complexity facilities had higher expected rates of community emergency care than lower volume and high-complexity facilities, respectively. As veterans increasingly use community EDs for acute, unscheduled needs, attention to factors associated with veterans' use of acute care services in different settings are important to identify access barriers and to ensure veterans' health care needs are met.

Emergency Department Volume, Severity, and Crowding Since the Onset of the Coronavirus Disease 2019 Pandemic

We describe emergency department (ED) visit volume, illness severity, and crowding metrics from the onset of the coronavirus disease 2019 (COVID-19) pandemic through mid-2022. We tabulated monthly data from 14 million ED visits on ED volumes and measures of illness severity and crowding from March 2020 through August 2022 compared with the same months in 2019 in 111 EDs staffed by a national ED practice group in 18 states. Average monthly ED volumes fell in the early pandemic, partially recovered in 2022, but remained below 2019 levels (915 per ED in 2019 to 826.6 in 2022 for admitted patients; 3,026.9 to 2,478.5 for discharged patients). The proportion of visits assessed as critical care increased from 7.9% in 2019 to 11.0% in 2022, whereas the number of visits decreased (318,802 to 264,350). Visits billed as 99285 (the highest-acuity Evaluation and Management code for noncritical care visits) increased from 35.4% of visits in 2019 to 40.0% in 2022, whereas the number of visits decreased (1,434,454 to 952,422). Median and median of 90th percentile length of stay for admitted patients rose 32% (5.2 to 6.9 hours) and 47% (11.7 to 17.4 hours) in 2022 versus 2019. Patients leaving without treatment rose 86% (2.9% to 5.4%). For admitted psychiatric patients, the 90th percentile length of stay increased from 20 hours to more than 1 day. ED visit volumes fell early in the pandemic and have only partly recovered. Despite lower volumes, ED crowding has increased. This issue is magnified in psychiatric patients.

The Incidence and Risk Factors for Emergency Department Imaging in Acute Renal Colic.

Objective: To determine the incidence of and risk factors for imaging in patients presenting to the emergency department (ED) with renal colic. Subject/Patients and Methods: We conducted a population-based cohort study in the province of Ontario, utilizing linked administrative health data. Patients who presented to an ED with renal colic between April 1, 2010, and June 30, 2020, were included. The rate of initial imaging (CT scans and ultrasound [U/S]) and repeat imaging within 30 days was determined. Generalized linear models were utilized to evaluate patient and institutional-level characteristics associated with imaging, and specifically CT vs U/S. Results: There were 397,491 index renal colic events, of which 67% underwent imaging (CT 68%, U/S 27%, and CT+U/S same day 5%). Repeat imaging was performed in 21% of events (U/S in 12.5%, CT in 8.4%) at a median of 10 days. Of those with an initial U/S, 28% had repeat imaging compared with 18.5% for those with an initial CT. Undergoing an initial CT was associated with being male, urban residence, later year of cohort entry, history of diabetes mellitus and inflammatory bowel disease, and presentation to nonacademic hospitals of larger size, or with a higher volume of ED visits. Conclusion: Two-thirds of renal colic patients underwent imaging, and CT was the most utilized modality. Patients undergoing an initial CT had a lower likelihood of repeat imaging within 30 days. The utilization of CT increased over time and was more common in males and those presenting to nonacademic hospitals of larger size, or with higher ED volumes. Our study highlights the patient- and institution-level factors that need to be targeted with prevention strategies to reduce the utilization of CT scans, when possible, for cost reduction and to minimize patient exposure to ionizing radiation.

Medicaid expansion associated with no change in emergency department use across racial and ethnic groups.

To estimate changes in the emergency department (ED) visit rate, hospitalization share of ED visits, and ED visit volumes associated with Medicaid expansion among Hispanic, Black, and White adults. For the population of adults aged 26-64 with no insurance or Medicaid coverage, we obtained census population and ED visit counts during 2010-2018 in nine expansion and five nonexpansion states. The primary outcome was the annual number of ED visits per 100 adults ("ED rate"). The secondary outcomes were the share of ED visits leading to hospitalization, total number ("volumes") of all ED visits, ED visits leading to discharge ("treat-and-release") and ED visits leading to hospitalization ("transfer-to-inpatient"), and the share of the study population with Medicaid ("Medicaid share"). An event-study difference in differences design that contrasts pre- versus post-expansion changes in outcomes in Medicaid expansion and nonexpansion states. In 2013, the ED rate was 92.6, 34.4, and 59.2 ED visits among Black, Hispanic, and White adults, respectively. The expansion was associated with no change in ED rate in all three groups in each of the five post-expansion years. We found that expansion was associated with no change in the hospitalization share of ED visits and the volume of all ED visits, treat-and-release ED visits, and transfer-to-inpatient ED visits. The expansion was associated with an 11.7% annual increase (95% CI, 2.7%-21.2%) in the Medicaid share of Hispanic adults, but no significant change among Black adults (3.8%; 95% CI, -0.04% to 7.7%). ACA Medicaid expansion was associated with no changes in the rate of ED visits among Black, Hispanic, and White adults. Expanding Medicaid eligibility may not change ED use, including among Black and Hispanic subgroups.

Payer shifting after expansions in access to private care among veterans.

To investigate whether expanded access to Veterans Affairs (VA)-purchased care increased overall utilization or induced a shift from other payers to VA for emergency care among VA enrollees. This study included all emergency department (ED) encounters in 2019 from hospitals in the state of New York. We conducted a difference-in-differences analysis comparing VA enrollees to the general population before and after the implementation of the Maintaining Internal Systems and Strengthening Integrated Outside Networks (MISSION) Act in June 2019. We included all ED visits with individuals aged 30 or older at the time of the encounter. Individuals were considered eligible for the policy change if they were enrolled with VA at the beginning of 2019. Of the 5,577,199 ED visits in the sample, 4.9% (n = 253,799) were made by VA enrollees. Of these, 44.9% of visits were paid by Medicare, 32.8% occurred in VA facilities, and 7% were paid by private health insurance. There was a 6.4% (2.91 percentage points; std. error = 0.18; p < 0.01) decrease in the proportion of ED visits paid by Medicare among VA enrollees relative to the general population after the implementation of the MISSION Act in June 2019. This decrease was larger for ED visits with a subsequent inpatient admission (-8.4%; 4.87 percentage points; std. error = 0.33; p < 0.01). There was no statistically significant change in the total volume of ED visits (0.06%; std. error = 0.08; p = 0.45). Leveraging a novel dataset, we demonstrate that MISSION Act implementation coincided with a shift in the financing of non-VA ED visits from Medicare to VA without any increase in overall ED utilization. These findings have important implications for VA health care financing and delivery.

COVID-19 pandemic–associated changes in overall emergency department visits by age group, race, and ethnicity — United States, January 2019–April 2022

BackgroundED data are an important source of surveillance data for monitoring many conditions of public health concern and are especially useful in describing trends related to new, or unusual public health events. The COVID-19 pandemic led to significant changes in emergency care seeking behavior. We described the trends in all-cause emergency department (ED) visit volumes by race, ethnicity, and age using ED data from the National Syndromic Surveillance Program (NSSP) during December 30, 2018–April 2, 2022. MethodsWe described total and race, ethnicity, and age group-specific ED visit volumes during the COVID-19 pandemic by comparing quarterly visit volumes during the pandemic period to the relevant quarters in 2019. We quantified the variability of ED visits volumes by calculating the coefficient of variation in mean weekly ED visit volume for each quarter during Q1 2019–Q1 2022. ResultsOverall ED visits dropped by 32% during Q2 2020, when the COVID-19 pandemic began, then rebounded to 2019 baseline by Q2 2021. ED visits for all race, ethnicity, and age groups similarly dropped in Q2 2020 and adults of all race and ethnicity groups rebounded to at or above pre-pandemic levels while children remained at or below the pre-pandemic baseline except during Q3 2021. There was larger variation in mean weekly ED visits compared to the respective quarter in 2019 for 6 of 9 quarters during Q1 2020–Q1 2022. ConclusionsED utilization fluctuated considerably during the COVID-19 pandemic. Overall ED visits returned to within 5% of 2019 baseline during Q2 2021, however, ED visits among children did not return to the 2019 baseline until Q3 2021, then again dropped below the 2019 baseline in Q4 2021. Trends in ED visit volumes were similar among race and ethnicity groups but differed by age group. Monitoring ED data stratified by race, ethnicity and age can help understand healthcare utilization trends and overall burden on the healthcare system as well as facilitate rapid identification and response to public health threats that may disproportionately affect certain populations.

Predicting daily emergency department visits using machine learning could increase accuracy

ObjectiveAdministrators and clinicians alike have attempted to predict emergency department visits for many years. The ability to predict or “forecast” ED visit volume can allow for more efficient resource allocation, including up-staffing or down-staffing, changing OR schedules, and predicting the need for significant resources. The goal of this study is to examine combinations of variables via machine learning to increase prediction accuracy and determine the factors that are most predictive of overall ED visits. As compared to a simple univariate time series model, we hypothesize that machine learning models will predict St. Joseph Mercy Ann Arbor's patient visit load for the emergency department (ED) with higher accuracy than a simple univariate time series model. MethodsUnivariate time series models for daily ED visits, including ARIMA, Exponential Smoothing (ETS), and Facebook Inc.'s prophet algorithm were estimated as a baseline comparison. Machine learning models, including random forests and gradient boosted machines (GBM), were trained using data from 2017 to 2018. After final models were created, they were applied to the 2019 data to determine how well these models predicted actual ED patient volumes in data not utilized during the model fitting process. The accuracy of the machine learning and time series models were assessed based on out-of-sample predictive accuracy, compared using root mean squared error (RMSE). ResultsUsing root mean squared error (RMSE) to assess out-of-sample predictive accuracy of the models, the results showed that the random forest model was the most accurate at predicting daily ED visits in the 2019 test set, followed by the GBM model. These performed only slightly better than the simple exponential smoothing model predictions. The ARIMA model performed poorly in comparison. The day of the week (likely capturing differences between weekdays and weekends) was found to be the most important predictor of patient volumes. Weather-related features such as maximum temperature and SFC pressure appeared to capture some of the seasonality trends related to changes in patient volumes. ConclusionsMachine learning models perform better at predicting daily patient volumes as compared to simple univariate time series models, though not by a substantial amount. Further research can help confirm these limited initial results. Gathering more training data and additional feature engineering could also be beneficial to training the models and potentially improving predictive accuracy.

Emergency Department Visits for Heat-Related Emergency Conditions in the United States from 2008-2020.

Exposure to high temperatures is detrimental to human health. As climate change is expected to increase the frequency of extreme heat events, and raise ambient temperatures, an investigation into the trend of heat-related emergency department (ED) visits over the past decade is necessary to assess the human health impact of this growing public health crisis. ED visits were examined using the Nationwide Emergency Department Sample. Visits were included if the diagnostic field contained an ICD-9-CM or ICD-10-CM code specific to heat-related emergency conditions. Weighted counts were generated using the study design and weighting variables, to estimate the national burden of heat-related ED visits. A total of 1,078,432 weighted visits were included in this study. The annual incidence rate per 100,000 population increased by an average of 2.85% per year, ranging from 18.21 in 2009, to 32.34 in 2018. The total visit burden was greatest in the South (51.55%), with visits increasing to the greatest degree in the Midwest (8.52%). ED visit volume was greatest in July (29.79%), with visits increasing to the greatest degree in July (15.59%) and March (13.18%). An overall increase in heat-related ED visits for heat-related emergency conditions was found during the past decade across the United States, affecting patients in all regions and during all seasons.

A novel PA-led urgent care model for medical oncology patients at a large academic cancer center.

37 Background: Oncology patients are high users of the emergency department (ED), which often results in hospital admissions for management of cancer symptoms or cancer treatment toxicities. Interventions such as urgent care (UC) models can decrease such visits, and help improve patient management, health care utilization, and patient experience. Sunnybrook Health Sciences Centre, a large tertiary care hospital in Toronto, Canada has a high volume of medical oncology ED visits (average 4 per day) with about 50% admitted for management. Methods: A novel physician-assistant (PA) led and physician supervised UC model was developed to assist in medical oncology patient phone triage, assessment, and management of cancer or treatment related issues that would otherwise have been sent to the ED by the oncology team. There were two phases: 1) due to COVID, the patients were managed in a dedicated stream primarily using space and nursing in the ED, 2) a dedicated UC clinic with nursing support was opened for these patients. Results: In phase 1, there were 424 referrals over 24 months; 84% would have otherwise been sent through the usual ED process. 26% of patients were managed with PA navigation outside the UC program in other hospital settings. Of the 204 patients formally treated in the UC stream, 67.7% were discharged home. At 48 hours, 89% of discharged patients were stable or improved; this was 80% at 14 days, and 17.3% came back to the ED or were admitted within 14 days of the UC visit. In phase 2, there have so far been 214 referrals over 5 months; 83.6% would have otherwise been sent to the ED. Of the patients who were assessed, 77.9% were discharged home. Outcomes of these patients are being collected. The top 3 patient issues managed during both phases were: fever, pain, and dyspnea. Fifteen patient telephone surveys were completed, and 93.3% were either satisfied or highly satisfied with their UC experience. Conclusions: A novel PA-led triage and management model for urgent medical oncology patient issues was found in initial phase to be feasible and effective with streamlined care through the ED. Once a dedicated UC clinic was opened, referral volumes increased, and a high rate of ED diversion, patient discharge, and effective care was continued. Patients were also highly satisfied. Several ongoing process and outcome measures are being evaluated to help expand the scope and impact of this resource.

COVID–19 driven decline in emergency visits: Has it continued, is it permanent, and what does it mean for emergency physicians?

IntroductionHospital-based emergency departments have been a sustained source of overall hospital utilization in the United States. In 2019, an estimated 150 million hospital-based emergency department (ED) visits occurred in the United States, up from 90 million in 1993, 108 million in 2000 and 137 million in 2015. This study analyzes hospital ED visit registration data pre and post to the COVID-19 pandemic describe the impact of on hospital ED utilization and to assess long-term implications of COVID and other factors on the utilization of hospital-based emergency services. MethodsWe analyze real-time hospital ED visit registration data from a large sample of US hospitals to document changes in ED visits from January 2020 through March 2022 relative to 2019 (pre-COVID baseline) to describe the impact of the COVID-19 pandemic on EDs and assess long-term implications. ResultsOur data show an initial steep reduction in ED visits during the first half of 2020 (compared to 2019 levels) with rebounding occurring in 2021, but never reaching pre-pandemic levels. Overall, ED visit volumes across the study states declined in each year since 2019: 2020 declined by −18%, 2021 by −10% and the first quarter of 2022 is −12% below 2019 levels. ConclusionsThere is a wide range of potential long-term implications of the observed reduction in the demand for hospital-based emergency services not only for emergency physicians, but for hospitals, health plans and consumers.

Changes and Inequities in Adult Mental Health–Related Emergency Department Visits During the COVID-19 Pandemic in the US

The COVID-19 pandemic has negatively affected adult mental health (MH), with racial and ethnic minoritized groups disproportionately affected. To examine changes in adult MH-related emergency department (ED) visits into the Delta variant pandemic period and identify changes and inequities in these visits before and during COVID-19 case surges. This epidemiologic cross-sectional study used National Syndromic Surveillance Program data from US adults aged 18 to 64 years from 1970 to 2352 ED facilities from January 1, 2019, to August 14, 2021. All MH-related ED visits and visits related to 10 disorders (ie, anxiety, depressive, bipolar, schizophrenia spectrum, trauma- and stressor-related, attention-deficit/hyperactivity, disruptive behavioral and impulse, obsessive-compulsive, eating, and tic disorders) were identified. The following periods of MH-related ED visits were compared: (1) high Delta variant circulation (July 18-August 14, 2021) with a pre-Delta period (April 18-May 15, 2021), (2) after a COVID-19 case peak (February 14-March 13, 2021) with during a peak (December 27, 2020-January 23, 2021), and (3) the Delta period and the period after a COVID-19 case peak with the respective corresponding weeks during the prepandemic period. ED visits for 10 mental disorders and all MH-related visits. This cross-sectional study included 107 761 319 ED visits among adults aged 18 to 64 years (59 870 475 [56%] women) from January 1, 2019, to August 14, 2021. There was stability in most MH-related ED visit counts between the Delta and pre-Delta periods (percentage change, -1.4% to -7.5%), except for eating disorders (-11.9%) and tic disorders (-19.8%) and after a COVID-19 case peak compared with during a peak (0.6%-7.4%). Most MH-related ED visit counts declined in the Delta period relative to the prepandemic period (-6.4% to -30.7%); there were fluctuations by disorder when comparing after a COVID-19 case peak with the corresponding prepandemic period (-15.4% to 11.3%). Accounting for ED visit volume, MH-related ED visits were a smaller proportion of visits in the Delta period compared with the pre-Delta period (visit ratio, 0.86; 95% CI, 0.85-0.86) and prepandemic period (visit ratio, 0.80; 95% CI, 0.79-0.80). After a COVID-19 case peak, MH-related ED visits were a larger proportion of ED visits compared with during a peak (visit ratio, 1.04; 95% CI, 1.03-1.04) and the corresponding prepandemic period (visit ratio, 1.11; 95% CI, 1.11-1.12). Of the 2 510 744 ED visits included in the race and ethnicity analysis, 24 592 (1%) were American Indian or Alaska Native persons, 33 697 (1%) were Asian persons, 494 198 (20%) were Black persons, 389 740 (16%) were Hispanic persons, 5000 (0.2%) were Native Hawaiian or Other Pacific Islander persons, and 1 172 683 (47%) were White persons. There was between- and within-group variation in ED visits by race and ethnicity and increases in selected disorders after COVID-19 peaks for adults aged 18 to 24 years. Results of this cross-sectional study suggest that EDs may have increases in MH-related visits after COVID-19 surges, specifically for young adults and individual racial and ethnic minoritized subpopulations. Public health practitioners should consider subpopulation-specific messaging and programmatic strategies that address differences in MH needs, particularly for those historically marginalized.

Association of Emergency Department Payer Mix with ED Receipt of Telehealth Services: An Observational Analysis.

IntroductionTelehealth is commonly used to connect emergency department (ED) patients with specialists or resources required for their care. Its infrastructure requires substantial upfront and ongoing investment from an ED or hospital and may be more difficult to implement in lower-resourced settings. Our aim was to examine for an association between ED payer mix and receipt of telehealth services.MethodsUsing data from the National Emergency Department Inventory (NEDI)-USA 2016 survey, we categorized EDs based on receipt of telehealth services (yes/no). The NEDI-USA data for EDs in New York state was linked with data from state ED datasets (SEDD) and state inpatient data (SID) to determine EDs’ payer mix (percent self-pay or Medicaid). Other ED characteristics of interest were rural location, academic status, and annual ED visit volume. We compared EDs with and without telehealth receipt, and used a logistic regression model to examine the relationship between ED payer mix and telehealth receipt after accounting for other ED characteristics.ResultsOf the 162 New York EDs in the SEDD-SID dataset, 160 (99%) were linked to the NEDI-USA dataset and 133 of those responded (83%) to the survey. Telehealth receipt was reported by 48 EDs (36%, 95% confidence interval [CI], 28–44%). Emergency departments with and without telehealth receipt were similar (all P >0.40) with respect to rurality (6% vs 9%, respectively), academic status (13% vs 8%), and annual volume (median 36,728 vs 43,000). By contrast, median percent of Medicaid or self-pay patients was lower in telehealth EDs (36%) vs non-telehealth EDs (45%, P = 0.02). In adjusted analysis, increasing proportion of Medicaid and self-pay patients was associated with decreased odds of telehealth receipt (odds ratio 0.87 per 5% increase; 95% CI, 0.77–0.99). Rural location, academic status, and ED volume were not significantly associated with odds of ED telehealth receipt in the adjusted model.ConclusionAmong EDs in the state of New York, increasing proportion of self-pay and Medicaid patients was associated with decreased odds of ED telehealth receipt, even after accounting for rural location, academic status, and ED volume. The findings support the need for additional infrastructural investment in EDs serving a greater proportion of disadvantaged patients to ensure equitable access.

Demographics of mental healthcare presentations in a northwest Ontario emergency department.

Providing emergency mental health services for populations in remote rural areas of Canada is challenging. Program needs are distinct. We describe the emergency mental health workload and service needs at the Sioux Lookout Meno Ya Win Health Centre (SLMHC) in northwest Ontario. Emergency department (ED) data were collected for mental health, addiction and self-harm diagnoses (MHA) in 2018/2019. Comparisons were made to similar sized provincial hospitals and EDs. Mental health admissions data from Oct 1, 2018 to Dec 31, 2019 were manually collected from hospital medical charts for demographics, suicide attempts/ideation and frequency of applications for Form 1 psychiatric assessment. The volume of MHA ED visits as a percentage of total ED visits was 4 times higher at SLMHC when compared to both the 67 other Ontario level C hospitals (< 100 beds) and the 15 level C hospital with a similar volume of ED visits (15,000-20,000), (15% vs 4%). Self-harm presentations were 308 at SLMHC versus an average of 42 ± 37 at the 15 level C hospitals with a similar ED volume. From Oct 1, 2019 to Dec 31, 2019, there were 49 patients requiring a Form 1, with an average wait time of 55h before transfer to a schedule 1 facility. There is an increased level of mental health, addiction and self-harm presentations in this northern ED. Lack of alternative resources indicate the need for the development of an integrated model of mental health care service. Reliance on the ED for crisis management indicates the need for the development of more regionally relevant models of care.

Do Adult Medicaid Benefits for Oral Health Reduce ED Visits?

The previous ChristianaCare Health System (CCHS) study that examined the financial burden of dental-related Emergency Department (ED) visits within the ChristianaCare Health System between June 1, 2013, and June 22, 2018, provided evidence to support the claim that a large percentage of patients utilizing the ED for dental-related disease were uninsured, as well as the fact that the treatment the patients received was more costly and less effective than definitive dental care in a dental/oral surgery office. On October 1, 2020, adults (19-65) living in Delaware who were eligible for medical Medicaid coverage were enrolled in dental Medicaid coverage as part of their plans. This study aims to compare the previous study's results to the same population between the dates of October 1, 2020, and March 1, 2021, following the approval of adult Medicaid dental coverage and to determine if there was an increased utilization of dental benefits and a subsequent reduction in ED-related dental visits, as patients opted to seek care at dental/oral surgery offices.Data were retrospectively collected on all non-traumatic, dental-related problems presenting to the Wilmington and Christiana Emergency Departments between October 1, 2020, and March 1, 2021. Patients were categorized by the diagnostic code (ICD-10) used during their ED visits. Patient demographics and insurance coverage were obtained. The data were analyzed, and the treatment provided was determined for each visit based on the CPT code used. These results were then extrapolated and compared to the previous study's statistics to determine: 1) if the insurance coverage types and 2) subsequent volume of ED visits had significantly changed as compared to the pre-Medicaid dental coverage time period.After extrapolating the results of the 6-month time period (October 1, 2020, to March 1, 2021), it was determined that the overall distribution of insurance coverage types of those patients presenting to the ED did not significantly change when compared to the previous study (June 1, 2013, to June 22, 2018). Overall, the percentage of patients utilizing Medicaid insurance for ED-related dental visits was 56% before and after the institution of the dental benefits through Medicaid. However, the volume of patients presenting to the ED for dental-related concerns decreased following the addition of dental benefits within adult Medicaid.Based on the results exhibited in this study, since the addition of dental benefits to adult Medicaid in Delaware, the number of dental-related ED visits appears to have decreased as compared to those exhibited in the previous study, while the overall distribution of insurance coverage types did not appear to significantly change. This reduction in total volume of dental-related ED visits is suspected to be related to improved access to care with the addition of dental benefits to adult Medicaid. It is believed that with this improved access to care, along with continued community outreach and dental education, the volume of future dental-related ED visits can effectively continue to be reduced, and the shift toward the use of dental/oral surgery offices for more effective and definitive dental care can be promoted. Furthermore, this trend is suspected to lead to improved oral health throughout the community and a decrease in the total cost of care.

Prior Frequent Emergency Department Use as a Predictor of Emergency Department Visits After a New Cancer Diagnosis.

To determine whether emergency department (ED) visit history prior to cancer diagnosis is associated with ED visit volume after cancer diagnosis. This was a retrospective cohort study of adults (≥ 18 years) with an incident cancer diagnosis (excluding nonmelanoma skin cancers or leukemia) at an academic medical center between 2008 and 2018 and a safety-net hospital between 2012 and 2016. Our primary outcome was the number of ED visits in the first 6 months after cancer diagnosis, modeled using a multivariable negative binomial regression accounting for ED visit history in the 6-12 months preceding cancer diagnosis, electronic health record proxy social determinants of health, and clinical cancer-related characteristics. Among 35,090 patients with cancer (49% female and 50% non-White), 57% had ≥ 1 ED visit in the 6 months immediately following cancer diagnosis and 20% had ≥ 1 ED visit in the 6-12 months prior to cancer diagnosis. The strongest predictor of postdiagnosis ED visits was frequent (≥ 4) prediagnosis ED visits (adjusted incidence rate ratio [aIRR]: 3.68; 95% CI, 3.36 to 4.02). Other covariates associated with greater postdiagnosis ED use included having 1-3 prediagnosis ED visits (aIRR: 1.32; 95% CI, 1.28 to 1.36), Hispanic (aIRR: 1.12; 95% CI, 1.07 to 1.17) and Black (aIRR: 1.21; 95% CI, 1.17 to 1.25) race, homelessness (aIRR: 1.95; 95% CI, 1.73 to 2.20), advanced-stage cancer (aIRR: 1.30; 95% CI, 1.26 to 1.35), and treatment regimens including chemotherapy (aIRR: 1.44; 95% CI, 1.40 to 1.48). The strongest independent predictor for ED use after a new cancer diagnosis was frequent ED visits before cancer diagnosis. Efforts to reduce potentially avoidable ED visits among patients with cancer should consider educational initiatives that target heavy prior ED users and offer them alternative ways to seek urgent medical care.

Opioid-related Emergency Department Visits During COVID-19 in a Large Health System.

Objective:Multiple states have reported increases in opioid overdose deaths during the coronavirus disease 2019 (COVID-19) pandemic, however little is known about opioid-related presentations to the emergency department (ED).Methods:This was a time series analysis of visits to 7 EDs in greater Chicago, Illinois from October 20, 2019 to July 25, 2020. We compared the number of ED visits for opioid-related diagnoses in the time period preceding the World Health Organization pandemic declaration (prepandemic period, October 20, 2019–July 3, 2020) to the time period following the World Health Organization declaration (pandemic period, March 8, 2020 to July 25, 2020) using a single-group interrupted time series analysis with Newey-West standard errors. We also present data on alcohol-related ED visits for comparison.Results:We evaluated a total of 177,405 visits across the 7 EDs during the study period. The mean number of weekly ED visits in the prepandemic and pandemic periods was 4841 and 4029 weekly visits, respectively. In the interrupted time series analysis, there was no significant immediate effect of the pandemic start on opioid-related ED visits (−0.44 visits per 1000 ED visits, 95% CI −2.47 to 1.58, P = 0.66), however, there was a significant immediate effect of the pandemic start on alcohol-related ED visits (−4.1, 95% CI: −8.25 to −0.01, P < 0.05).Conclusions:Despite reductions in overall ED visit volumes and alcohol-related visits during COVID-19, the number of opioid-related visits was not significantly reduced during the early pandemic. These data reinforce the need to provide comprehensive treatment services for opioid use disorder during the co-occurring COVID-19 and opioid crises.

Abstract P160: Characteristics of Telestroke Using Emergency Departments in a National Sample

Background: Most data on spoke emergency departments (EDs) using telestroke come from single academic hub-and-spoke networks. Our objective was to describe characteristics of EDs using telestroke in a national sample. Methods: We surveyed a convenience sample of 366 EDs among those who self-identified as using telestroke on the 2016 National ED Inventory (NEDI)-USA, which goes to all US EDs. Surveys were mailed to ED directors, with follow-up phone calls to non-responders. The survey characterized ED staffing, transfer patterns, in-person consultant availability, alteplase use, and frequency of telestroke consultations. Descriptive statistics are reported. Results: Of the 4,410 EDs responding to the NEDI-USA telemedicine question, 1,824 (41%) reported using telestroke. Compared to non-surveyed telestroke EDs (n=1458), the 366 surveyed EDs had lower annual ED visit volume, and were more often rural and critical access hospitals. Of these, 320 (91%) affirmed use of telestroke on our secondary survey. Many were rural (n=157, 49%); few were academic (n=4, 1%). Only 132 EDs (41%) reported that &gt; 80% of attending physicians were board certified or board eligible in emergency medicine. Joint Commission Stroke Center certification was reported by 101 EDs (32%) and alternative certification by another 53 (17%). Fifty-two EDs (16%) reported availability of an in-person neurologist, with 32 (10%) available within 30 minutes, and 29 (9%) available 24/7. Frequency of telestroke consultation varied (Figure). Most EDs administered alteplase in the past year (n=261, 82%); some reported alteplase administration without telestroke consultation (n=94, 30%). EDs frequently admitted TIA and stroke patients without thrombolysis (78% and 55% respectively), but fewer (24%) admitted alteplase-treated patients. Conclusions: Telestroke is frequently used in US EDs. Of those surveyed, many had non-emergency medicine attending staffing and use the technology regularly.

Availability of Pediatric Emergency Care Coordinators in United States Emergency Departments

To determine the availability of pediatric emergency care coordinators (PECCs) in US emergency departments (EDs) in 2015, and to determine the change in availability of PECCs in US EDs from 2015 to2017. As part of the National Emergency Department Inventory-USA, we administered a survey to all 5326 US EDs open in 2015; all 5431 in 2016; and all 5489 in 2017. Through these surveys, we assessed the availability of PECCs. Descriptive statistics characterized EDs with and without PECCs; multivariable logistic regressions identified characteristics independently associated with PECC availability. Among the 4443 (83%) EDs with 2015 data, 763 (17.2%) reported the availability of at least 1 PECC. The states with the largest proportion of EDs with PECCs were Delaware (78%, 7/9 EDs) and Maryland (48%, 20/42 EDs), and no PECCs were reported in Mississippi, North Dakota, or Wyoming. Availability of a PECC was associated (P<.001) with larger annual total ED visit volume and a dedicated pediatric ED area. Compared with the 17.2% of EDs reporting a PECC in 2015, 833 (18.6%) reported 1 in 2016, and 917 (19.8%) reported 1 in 2017 (P<.001). Availability of at least 1 PECC increased slightly (2.6%) between 2015 and 2017, but ∼80% of EDs continue without one.

Trends in US Emergency Department Visits for Mental Health, Overdose, and Violence Outcomes Before and During the COVID-19 Pandemic

The coronavirus disease 2019 (COVID-19) pandemic, associated mitigation measures, and social and economic impacts may affect mental health, suicidal behavior, substance use, and violence. To examine changes in US emergency department (ED) visits for mental health conditions (MHCs), suicide attempts (SAs), overdose (OD), and violence outcomes during the COVID-19 pandemic. This cross-sectional study used data from the Centers for Disease Control and Prevention's National Syndromic Surveillance Program to examine national changes in ED visits for MHCs, SAs, ODs, and violence from December 30, 2018, to October 10, 2020 (before and during the COVID-19 pandemic). The National Syndromic Surveillance Program captures approximately 70% of US ED visits from more than 3500 EDs that cover 48 states and Washington, DC. Outcome measures were MHCs, SAs, all drug ODs, opioid ODs, intimate partner violence (IPV), and suspected child abuse and neglect (SCAN) ED visit counts and rates. Weekly ED visit counts and rates were computed overall and stratified by sex. From December 30, 2018, to October 10, 2020, a total of 187 508 065 total ED visits (53.6% female and 46.1% male) were captured; 6 018 318 included at least 1 study outcome (visits not mutually exclusive). Total ED visit volume decreased after COVID-19 mitigation measures were implemented in the US beginning on March 16, 2020. Weekly ED visit counts for all 6 outcomes decreased between March 8 and 28, 2020 (March 8: MHCs = 42 903, SAs = 5212, all ODs = 14 543, opioid ODs = 4752, IPV = 444, and SCAN = 1090; March 28: MHCs = 17 574, SAs = 4241, all ODs = 12 399, opioid ODs = 4306, IPV = 347, and SCAN = 487). Conversely, ED visit rates increased beginning the week of March 22 to 28, 2020. When the median ED visit counts between March 15 and October 10, 2020, were compared with the same period in 2019, the 2020 counts were significantly higher for SAs (n = 4940 vs 4656, P = .02), all ODs (n = 15 604 vs 13 371, P < .001), and opioid ODs (n = 5502 vs 4168, P < .001); counts were significantly lower for IPV ED visits (n = 442 vs 484, P < .001) and SCAN ED visits (n = 884 vs 1038, P < .001). Median rates during the same period were significantly higher in 2020 compared with 2019 for all outcomes except IPV. These findings suggest that ED care seeking shifts during a pandemic, underscoring the need to integrate mental health, substance use, and violence screening and prevention services into response activities during public health crises.