Emergency Department Visits Research Articles

Prior Antidepressant Prescription is Associated with Greater Opioid Prescriptions and Complications in Cervical Spine Surgery

Study Design: Retrospective cohort study of national database. Objective: This study evaluates the impact of antidepressant prescriptions on postoperative outcomes and complications in cervical spine surgery. Summary of Background Data: Patients who underwent cervical spine surgery often receive antidepressant prescriptions (ADP) to address concurrent mental health issues such as depression and anxiety. However, the use of antidepressants can affect bone metabolism. Yet, there is an opacity in the literature regarding the effects of ADP on outcomes of cervical spine surgery. Methods: Utilizing the TriNetX database, ACDF and Cervical Arthroplasty patients were matched on a 1:1 basis according to ADP status. Outcome variables such as emergency department visits, hospital readmissions, opioid prescription, and misuse, pseudoarthrosis, adjacent segment disease, and hardware failure were evaluated over follow-up periods ranging from 2 to 24 months. Results: In a matched sample of 12,838 patients, those with ADP exhibited significantly higher rates of opioid prescriptions at 2 weeks (OR 1.34, P<0.0001), 6 months (OR 1.36, P<0.0001), 12 months (OR 1.36, P<0.0001), and 24 months (OR 1.33, P<0.0001). Emergency Department visits were significantly higher at 6 months (OR 1.11, P=0.0082) and 24 months (OR 1.083, P=0.014). Opioid abuse is notably higher by 24 months (OR 1.37, P=0.0033). Hospitalization rates were significantly increased at 12 months (OR 1.16, P=0.0013) and 24 months (OR 1.18, P<0.0001). Adjacent segment disease (OR 1.54, P<0.0001 at 24 mo), hardware failure (OR 1.42, P=0.013 at 24 mo), and pseudarthrosis (OR 1.48, P<0.0001 at 24 mo) were also significantly higher in the ADP group. Conclusions: Patients with ADP undergoing cervical spine surgery experience higher risks of opioid use and abuse, increased hospital readmissions, emergency department visits, and a higher rate of mechanical complications. Level of Evidence: III

High blood pressure in the emergency department as an opportunistic screening tool for detection of hypertension.

Hypertension is the most preventable cause of morbidity and mortality, but many individuals are underdiagnosed and lack treatment control. High blood pressure (BP) in the emergency department (ED) is commonly observed, but mostly used for short-term evaluation. We aimed to study the usefulness of high BP in the ED as a screening tool for undiagnosed hypertension. We used the electronic medical record system to identify all patients that had attended the ED at a university hospital from 2018-01-01 to 2018-03-31 and from 2018-07-01 to 2018-09-30 with an obtained systolic BP ≥ 160 and/or diastolic BP ≥ 100 mmHg measured at the ED. We excluded patients with previously diagnosed hypertension and patients on BP-lowering medication. All patients identified where contacted two years after attending the ED, with a letter of consent and a questionnaire regarding diagnosis of hypertension and current medication. 5424 patients attended the ED during the 6-months-period. 271 patients met the inclusion criteria and were asked to participate. 167 individuals (62%) agreed to participate and responded to the questionnaire. Mean age of participants were 63.1 years and 51% were women. 134 patients (80%) had measured their BP after the ED-visit, and 48 (36%) of those had been diagnosed with hypertension. 96% of patients diagnosed with hypertension were on BP-lowering medication. To follow-up BP ≥ 160/100 mmHg after an ED visit can reveal undiagnosed hypertension in one third of the patients. Given the amount of undiagnosed hypertension, an ED-measured BP might provide an important tool to detect and start treatment of hypertension.

Are there differences in low-acuity emergency department visits between culturally and linguistically diverse migrants and people with English-speaking background: a population-based linkage study of adults over 45

BackgroundGrowing numbers of avoidable low-acuity visits to emergency departments (ED) are a major health policy concern globally and are thought to contribute to ED crowding. This study explores the differences...

Implantable cardioverter defibrillators in people dying with cancer: A SEER-Medicare analysis of ICD prevalence and association with aggressive end-of-life care.

The shared risk profiles for cancer and heart disease suggest many individuals with cancer may have an implantable cardioverter defibrillator (ICD). ICDs can have dramatic cancer end-of-life care implications including painful and distressing shocks. ICD prevalence and association with aggressive end-of-life care among individuals with breast, colorectal, and pancreatic cancer was evaluated using the Surveillance, Epidemiology, and End Results-Medicare dataset. A total of 37,306 Medicare beneficiaries aged ≥66 years with stage 3 or 4 cancer who died between 2005 and 2016 were identified. ICD prevalence, ICD-related care utilization that might present opportunities to discuss end-of-life implications and association with aggressive end-of-life care (>1 emergency department visit, intensive care unit admission, >1 hospitalization, terminal hospitalization, chemotherapy, and invasive or life-extending procedures) in the last month of life was assessed using multivariable logistic regression. Among cancer decedents, 6% had an ICD. More individuals with an ICD (31%) died in the hospital than individuals without an ICD (25%; p<.001). Half (46%) of individuals with an ICD had device programming or interrogation visits that could be an opportunity for device discussion. In adjusted models, ICD presence was associated with higher odds of every indicator of aggressive end-of-life care other than chemotherapy. Many older cancer decedents in the United States had an ICD, and those with ICDs received more aggressive care at the end of life. Results suggest there are opportunities to discuss ICD and goals of care, raise awareness and encourage shared decision-making for this population to ensure goal-concordant care, and improve end-of-life care quality.

Epidemiological and clinical management aspects related to urinary tract infections diagnosed in the emergency department in elderly patients in Spain: Results of the EDEN-36 study

To estimate the incidence of urinary tract infections (UTI) in elderly patients in Spanish emergency departments (ED), the need for hospitalization, diagnostic confirmation in hospitalized patients, adverse events and the predictive capacity of several biomarkers. In this a posteriori substudy of a generic study of reasons for ED visits in elderly patients, we included patients aged ≥65 years seen in 52 Spanish EDs for 1 week, selecting those diagnosed with UTI. As adverse events, in-hospital and 30-day mortality and combined adverse event (death or hospitalization) at 30 days post-discharge were collected. Relative risks (RR) were calculated. The predictive capacity of 10 variables and 6 biomarkers was investigated. A total of 25,375 patients were included, 1058 with UTI (annual incidence: 24.7 per 1000 inhabitants aged ≥65 years and year, 95%CI: 24.5-24.9). A total of 36.5% were hospitalized, and in 80% the diagnosis of UTI was confirmed at discharge. Overall 30-day mortality was 5.4% and in-hospital mortality was 3.4%. Functional dependence was associated with both events (RR:2.91;1.18-7.17 and RR:12.61;1.47-108.11, respectively), as was having a CRP greater than 100 mg/L (RR:2.24;1.17-4.30 and RR:3.21;1.37-7.51, respectively). The combined post-high event occurred in 10.6%, and was associated with functional dependence (RR:2.05;1.04-4.06). CRP and hemoglobin had significant value in predicting 30-day post-discharge mortality or hospitalization. UTI is a frequent diagnosis in elderly patients consulting in the ED. Functional dependence is the best factor associated with adverse events. The biomarkers analyzed do not have a good predictive capacity.

Addressing heatwave impacts on hospital admissions in an Italian region.

This study explores the dynamic of emergency department (ED) access during heat waves. Given the importance of avoiding overcrowding and long waits in an ED, it is important to explore all the possible determinants of ED inflows. We shed some light on the impact that heat waves have on this dynamic, via a quantitative analysis of the number of ED visits in the Campania region of Italy during the summers between 2016 and 2019. Aggregating individual-level data, we examine the relationship between extreme heat events and number of ED visits, controlling for social, demographic and economic characteristics. Our findings, obtained through Random Effects Poisson and fractional probit estimations, show that heat waves above 39 perceived degrees Celsius significantly increase the number of ED visits, revealing the impact that heat waves have on ED utilization in Campania. Insights for local public health strategies and emergency preparedness initiatives are discussed.

Paediatric Hand Fractures - A Review.

Paediatric hand fractures account for approximately 25% of hand-related emergency department visits, making them the second most common childhood fractures after distal forearm fractures. These injuries are more prevalent in boys and peak ages between 9 and 14 years. Hand fractures in children are primarily caused by crushing injuries and, increasingly in older children, by sports-related activities. The little finger (52%) and thumb (23%) are the most frequently fractured digits, with phalangeal fractures, especially of the proximal phalanx, being common. Metacarpal fractures are more prevalent in adolescents (13-16 years) compared to younger children. Accurate diagnosis in the paediatric population is complicated by difficult clinical examinations and the presence of growth plates, leading to an 8% misdiagnosis rate, mainly due to misinterpretation of the ossification centres and physes. High-quality radiographic evaluation combined with a thorough clinical assessment is critical for correct diagnosis and appropriate management. The robust periosteum and high remodelling potential of paediatric bones allow most hand fractures to be managed non-operatively with splinting or casting. However, fractures with significant angulation, rotation, intra-articular involvement or open wounds may require surgical intervention, such as closed or open reduction and internal fixation with Kirschner wires. Most paediatric hand fractures heal well with excellent functional outcomes due to the high remodelling capacity of paediatric bones. Early mobilisation and appropriate immobilisation are key to preventing stiffness. Despite the generally favourable prognosis, certain fractures remain challenging to diagnose and treat, highlighting the need for specialised care. The aim of this review article is to discuss the epidemiology, fracture patterns, diagnostic challenges and management strategies essential for optimising functional outcomes and minimising long-term complications in treating paediatric hand fractures. Level of Evidence: Level V (Therapeutic).

Emergency Department Visits Involving Hallucinogen Use and Risk of Schizophrenia Spectrum Disorder.

Interest in and use of hallucinogens has been increasing rapidly. While a frequently raised concern is that hallucinogens may be associated with an increased risk of psychosis, there are limited data on this association. To examine whether individuals with an emergency department (ED) visit involving hallucinogen use have an increased risk of developing a schizophrenia spectrum disorder (SSD). This population-based, retrospective cohort study (January 2008 to December 2021) included all individuals aged 14 to 65 years in Ontario, Canada, with no history of psychosis (SSD or substance induced). Data were analyzed from May to August 2024. An incident ED visit involving hallucinogen use. Diagnosis of SSD using a medical record-validated algorithm. Associations between ED visits involving hallucinogens and SSD were estimated using cause-specific adjusted hazard models. Individuals with an incident ED visit involving hallucinogens were compared with members of the general population (primary analysis) or individuals with ED visits involving alcohol or cannabis (secondary analysis). The study included 9 244 292 individuals (mean [SD] age, 40.4 [14.7] years; 50.2% female) without a history of psychosis, with a median follow-up of 5.1 years (IQR, 2.3-8.6 years); 5217 (0.1%) had an incident ED visit involving hallucinogen use. Annual rates of incident ED visits involving hallucinogens were stable between 2008 and 2012 and then increased by 86.4% between 2013 and 2021 (3.4 vs 6.4 per 100 000 individuals). Individuals with ED visits involving hallucinogens had a greater risk of being diagnosed with an SSD within 3 years compared with the general population (age- and sex-adjusted hazard ratio [HR], 21.32 [95% CI, 18.58-24.47]; absolute proportion with SSD at 3 years, 208 of 5217 with hallucinogen use [3.99%] vs 13 639 of 9 239 075 in the general population [0.15%]). After adjustment for comorbid substance use and mental health conditions, individuals with hallucinogen ED visits had a greater risk of SSD compared with the general population (HR, 3.53; 95% CI, 3.05-4.09). Emergency department visits involving hallucinogens were associated with an increased risk of SSD within 3 years compared with ED visits involving alcohol (HR, 4.66; 95% CI, 3.82-5.68) and cannabis (HR, 1.47; 95% CI, 1.21-1.80) in the fully adjusted model. In this cohort study, individuals with an ED visit involving hallucinogen use had a greater risk of developing an SSD compared with both the general population and with individuals with ED visits for other types of substances. These findings have important clinical and policy implications given the increasing use of hallucinogens and associated ED visits.

Impact of Obstructive Sleep Apnea on Outcomes after Anterior Cervical Discectomy and Fusion

Study Design. Retrospective Cohort Objective. To evaluate the impact of having a history of Obstructive Sleep Apnea (OSA) in patients undergoing anterior cervical discectomy and fusion (ACDF) on postoperative outcomes. Summary of Background Data. With an aging population and rates of obesity increasing, comorbidities that influence patient safety are increasingly common. One frequently overlooked comorbidity is OSA which affects nearly 24% of the population. Despite its prevalence, the impact of OSA on outcomes following ACDF is poorly understood. Methods. A retrospective analysis of patients &gt;18 years who underwent 1-4 level ACDF at an academic medical center from 2014-2020 was performed. Patient’s age, sex, BMI, CCI, hypertension, diabetes, and levels fused were propensity matched in a 3:1 fashion. Outcomes assessed included inpatient complications, 30 and 90-day ED visits, 30 and 90-day readmissions, reoperations, and one-year PROMs. Results. A total of 344 ACDF patients (86 OSA, 258 No OSA) were included. 30-day ED visits were higher among the OSA compared to the non-OSA group (5.85% vs 0%, P=0.001). Among ED visits, there were 2 patients with pneumonia, 1 with dysphagia, and 1 with extremity weakness, none of which warranted readmission. ED visits equalized in the 30–90-day window. There were no significant differences in inpatient complications, LOS, discharge disposition, readmissions, reoperations, and one-year PROMs. Conclusion. Patients with a history of OSA underwent ACDF without an increased risk of postoperative complications, readmissions, or reoperations and experienced a complication rate much lower than previously suggested by current literature. OSA patients experienced similar improvements in PROMs at 1-year follow-up. Surgeons should counsel OSA patients regarding the increased risk of 30-day ED visits. But overall, patients can expect safe and equivalent outcomes compared to non-OSA patients which lends support for safe outpatient surgery in this population.

Economic evaluation of the Liverpool heart failure virtual ward model.

A virtual ward (VW) supports patients who would otherwise need hospitalisation by providing acute care, remote monitoring, investigations, and treatment at home. By March 2024 the VW programme had treated 10 950 patients across six speciality VWs, including heart failure (HF). This evaluation presents the economic assessment of the Liverpool HF VW. A comprehensive economic cost comparison model was developed by York Health Economics Consortium (University of York) to compare the costs of the VW to standard hospital inpatient care (SC). The model included direct VW costs and additional costs across the care pathway. Costs and resource use for 648 patients admitted to the HF VW were calculated for 30 days post discharge and total cohort costs were extrapolated to a full year. Primary outcomes included costs related to length of stay, readmissions, and NHS 111 contact. The total cost for the HF VW pathway, including set-up costs, was £467 524. This results in an incremental net cost benefit of £735 512 compared to the total SC cost of £1 203 036, indicating a substantial net cost benefit of £1 135 per patient per episode (PPPE). This advantage remains despite initial setup expenses and ongoing costs such as home visits, virtual consultations, point-of-care (POC) testing and home monitoring equipment. Our HF VW model offers a substantial net cost benefit, driven by reduced hospital stays, fewer emergency department visits, and lower readmission rates. The study highlights the importance of considering system-wide impacts and continuous monitoring of VWs as they develop.

Laparoscopic transabdominal vs. totally extraperitoneal inguinal hernia repair: outcomes, healthcare utilization, and cost differences.

Laparoscopic inguinal hernia repair utilizes either a transabdominal preperitoneal (TAPP) or totally extraperitoneal (TEP) approach. The literature remains mixed on outcomes comparing TAPP versus TEP. The objective of our study was to assess outcomes, healthcare utilization, and cost differences between TAPP and TEP inguinal hernia repair. Adult patients who underwent elective inguinal hernia repair between 2013 and 2021 were retrospectively identified from our institution's electronic health record. Baseline characteristics and postoperative complications were compared using chi-squared test. Multivariable logistic regression was used to model the odds of experiencing a postoperative emergency department visit, readmission, and/or reoperation within 6months were surgery. Generalized linear models were used to investigate differences in cost between TAPP and TEP groups. 1086 patients underwent TAPP repair, while 1277 patients underwent TEP repair. TAPP patients had more than double the rates of readmissions (3.1% vs. 1.3%, p = 0.002) and reoperations (1.5% vs. 0.2%, p = 0.001) within 6months of surgery. On multivariable analysis, undergoing TAPP inguinal hernia repair was associated with higher odds of reoperations and/or readmissions within 6months of surgery (OR 2.8, CI [1.5, 5.1], p = 0.001). TAPP repair had a higher index surgery cost and higher costs associated with reoperations and readmissions compared to TEP repair. Although both approaches are very safe, TAPP inguinal hernia repair had higher rates of postoperative complications, increased healthcare utilization, and higher associated costs. Future studies should be directed toward decreasing postoperative healthcare utilization in order to decrease costs in inguinal hernia repair.

Abstract 4117180: Hyperkalemia-Related Hospitalization Associated with Short-Term vs. Long-Term Outpatient SZC Therapy Among RAASi Users: The GALVANIZE Outcome study

Introduction: Patients receiving renin-angiotensin-aldosterone system inhibitors (RAASi) are at increased risk of developing hyperkalemia (HK). Sodium zirconium cyclosilicate (SZC) is used to treat HK, but the impact of duration of SZC on healthcare resource utilization (HRU) in RAASi users is unknown. The GALVANIZE Outcome study compared HK-related HRU among RAASi users between long-term and short-term SZC users. Methods: Adults with ≥1 outpatient prescription for SZC (index date) and ≥1 RAASi prescription spanning the index date were identified from a large US insurance claims database (7/2018-12/2022) and were stratified based on duration of SZC use. Long-term SZC users (&gt;90 days) and short-term SZC users (≤30 days) were exactly and propensity score matched on key baseline characteristics. Rates of HK-related hospitalizations or emergency department (ED) visits, HK-related ED visits, and HK-related hospitalizations were compared during follow-up from index to the earliest of 6 months post-index, end of data availability, other potassium binder use, or re-initiation of SZC post-discontinuation. Results: Among 1,586 matched pairs, the mean age was 65.5 years, 41.0% of patients were female, and most patients had any stage chronic kidney disease (91.9%), hypertension (90.8%), and diabetes (73.4%). Also, 30.0% of patients had heart failure. The most used RAASi therapies at index were angiotensin-converting enzyme inhibitors (57.3%) and angiotensin-receptor blockers (56.3%). Patients with long-term SZC use had a 44% lower rate of HK-related hospitalizations or ED visits, a 41% lower rate of HK-related hospitalizations and a 52% lower rate of HK-related ED visits than patients with short-term SZC use during follow-up (all p&lt;0.01; Figure 1). Conclusions: Among patients with RAASi and SZC therapy use, long-term SZC use was associated with significantly lower rates of HK-related HRU compared to matched patients with short-term SZC use. Funding: AstraZeneca

Abstract 4120196: Temporal Trends and Predictors of Cardiac Biomarker Testing in the Emergency Department, 2014-2021

Background: Presenting symptoms risk stratify patients presenting to the Emergency Department (ED) to determine their likelihood of having a myocardial infarction (MI) and need for cardiac biomarker testing. Since the 2014 AHA/ACC non-ST segment elevation MI (NSTEMI) guideline, little is known regarding cardiac biomarker testing trends in the United States. Methods: We analyzed data from the National Hospital Ambulatory Medical Care Survey for consecutive adult ED visits between 2014 and 2021 in the United States. The primary outcome was the proportion of ED visits where cardiac biomarker testing occurred. Subgroup analysis was performed for visits with chest pain, non-chest pain anginal equivalents, and non-anginal symptoms. Survey-weighted multivariable logistic regression was used to generate adjusted odds ratios (aOR) to assess predictors of cardiac biomarker utilization. Results: In total, 87,965 ED visits were sampled, representing a weighted total of 644,531,395 visits. Cardiac biomarker testing occurred in 7.21% of all ED visits (95% CI, 6.27%-8.29%) and increased over time (Figure, P =0.03 for trend). When stratified by symptoms, utilization of testing mainly increased among patients with non-chest pain anginal equivalents (Figure, P =0.02 for trend). Cardiac biomarker testing was most frequently used for patients with chest pain (34.9%) and non-chest pain anginal equivalents (39.3%). Nonetheless, 25.8% of patients who underwent testing had no chest pain or anginal equivalents. Cardiac biomarker testing was more frequent among patients with older age (aOR 1.03 per year, 95% CI 1.03-1.04), tachycardia (aOR 1.26, 95% CI 1.13-1.41), tachypnea (aOR 1.71, 95% CI 1.47-1.98), history of heart failure (aOR 1.33, 95% CI 1.15-1.54), prior venous thromboembolism (aOR 1.43, 95% CI 1.12-1.83), and those treated in a rural setting (aOR 1.63, 95% CI 1.14-2.32). Conclusion: Cardiac biomarker testing in the ED has increased over time, mostly attributed to increased utilization among patients with a low pre-test probability of MI. Notably, 25% of individuals who underwent cardiac biomarker testing had no chest pain or anginal-equivalent symptoms. More judicious utilization of cardiac biomarker testing may be needed.

Abstract 4137461: Elevated Lipoprotein(a) Increases Cardiovascular-Related Healthcare Resources Utilization and Costs among US Medicare, Medicaid, and Commercial Enrollees with ASCVD

Background: Elevated lipoprotein(a) [Lp(a)] is a recognized genetic, independent, and causal risk driver for atherosclerotic cardiovascular disease (ASCVD). Less is known about how elevated Lp(a) affects downstream cardiovascular (CV)-related healthcare resource utilization (HCRU) and costs in patients with ASCVD. Objective: To assess the association of Lp(a) levels with CV-related HCRU (hospitalizations, outpatient and emergency department [ED) visits), and CV-related costs for patients with ASCVD in a national-scale multi-insurance cohort. Methods: Patients with ASCVD were pooled from US Medicare, commercial, and Medicaid health plans from 2017 to 2022. Lp(a) levels (mg/dL and nmol/L) were linked at the patient level with HealthVerity Lab Data. Elevated Lp(a) was defined as Lp(a)≥70mg/dL (≥ 175 nmol/L) and normal Lp(a) was defined as Lp(a)&lt;30mg/dL (&lt;75 nmol/L). Generalized linear models with log link negative binomial distribution (HCRU) and log link gamma distribution (costs) adjusted for age, sex, race, insurance type, comorbidities, statin use, and prior hospitalizations, measured the association of Lp(a) levels with the annualized rate of CV-related hospitalizations, ED visits, and outpatient visits (incidence rate ratio [IRR]) and CV-related costs (annualized cost ratio). Results: A total of 180,240 ASCVD patients were identified with Lp(a) values. Median (IQR) Lp(a) was 14 mg/dL (4 mg/dL – 48 mg/dL) or 35 nmol/L (12 nmol/L – 114 nmol/L). Mean (SD) age was 68.6 (12.0) years with 49.9% being female; 72.8% of patients were from Medicare, followed by commercial (21.8%) and Medicaid (5.4%). Fully adjusted CV-related HCRU was significantly higher in those with elevated Lp(a) compared to normal Lp(a): inpatient hospitalizations (IRR=1.11), outpatient visits (IRR=1.11) and ED visits (IRR=1.06), all p &lt;0.001 (IRR and 95% CI reported in Table 1). Patients with elevated Lp(a) had 14% higher CV-related annualized healthcare costs than patients with normal Lp(a) (p &lt;0.001) with significantly higher CV-related HCRU beginning with Lp(a) levels &gt;30 mg/dL (&gt;75 nmol/L). Conclusion: Elevated Lp(a) was significantly associated with greater CV-related HCRU and costs in patients with ASCVD.

Level 4 seizure monitoring unit admissions are associated with reduced long-term health care costs.

This study was undertaken to determine whether admission to dedicated seizure monitoring units (SMUs) result in reduced health care use (HCU). This was a retrospective open cohort study covering the years 2010-2018 of patients residing in Alberta, Canada, who were referred to the Calgary Comprehensive Epilepsy Program and admitted to a level 4 SMU. Patients were required to have ≥3 years pre- and postadmission follow-up. The outcome was the change in trajectory of composite HCU (primary care, specialist outpatient visits, emergency department visits, and hospitalizations) for the 3 years prior to and 3 years following SMU admission using the point of admission as the "index date." Secondary outcomes were HCU limited to specific settings. We excluded the first 30 days following the point of admission to mitigate the confounding admission would have on the postadmission HCU trajectory. We used adjusted restricted maximum likelihood linear and nonlinear effects models to determine trajectories expressed as Canadian dollars. A total of 315 of 600 (53%) patients met eligibility criteria. Mean age was 40 years (SD = 17.4), 176 (56%) were female, 220 (70%) had focal epilepsy, and 60 (19%) had functional seizures or physiologic seizure mimics without epilepsy as adjudicated by the attending physician at the point of discharge. Mean per person health care costs increased by CAD$341.28 (95% confidence interval [CI] = -25.17 to 707.74) for each successive 6-month interval prior to SMU admission (p = .07). Following admission, mean per person costs decreased by CAD$802.34 (95% CI = 699.62-905.06, p < .001) for each successive 6-month interval up to 3 years postdischarge. Similar trends were noted for primary and specialist care, emergency department, admitted care, and when nonlinear models were applied. Admission to an SMU is associated with significant and enduring declines in HCU. Each 6-months following discharge overall HCU declined by a mean of CAD$802.34 and acute inpatient, emergency department, and outpatient physician interactions declined by 25%, 26%, and 18% respectively. Comprehensive epilepsy care not only reduces morbidity and mortality but also reduces cost.

Abstract 4131439: Routine Social Isolation Screening Among Adults with Cardiovascular Disease: A Survival Analysis

Background: Evidence linking social isolation to cardiovascular disease morbidity and mortality has grown in recent years. Still, information on how this may manifest in real world settings and its implications for screening practices is limited. In 2019, our large national integrated health care system implemented screening for social isolation as part of a broader universal social risk assessment. This repository of screening data was joined to administrative claims to test these associations in real world data and explore differences by demographic and medical factors. Methods: Social isolation responses recorded from 2019-2022 were included for a cohort of adult health plan members with documented atherosclerotic cardiovascular disease (ASCVD). We selected a single random assessment for each member and retained any other responses for sensitivity analyses. Cohort members had at least 10 months of enrollment surrounding assessment date for use as the baseline period and were followed for 365 days. We used cox proportional hazards regression with right censoring for coverage gaps to estimate the risk of all-cause mortality conferred by social isolation. We used Poisson regression to model the rate of inpatient stays. Results: There were 881 deaths among 7,484 members (18% of those with social isolation; 11% of those without). The isolated group skewed less male (54% vs. 65%, p &lt;0.001) and older (68.4 [SD 12.7] vs. 67.5 [SD 12.6] years, p &lt;0.05) than those not isolated. At baseline, the isolated group had higher rates of mean inpatient stays (2.3 [SD 1.9] vs. 1.9 [SD 1.6], p &lt;0.001), ED visits (1.2 [SD 1.9] vs. 0.9 [SD 1.6], p &lt; 0.001), and smoking (50% vs. 44%, p &lt; 0.05), and a higher mean Charlson Comorbidity Index (CCI) (3.6 [SD 2.6] vs. 3.0 [SD 2.4], p &lt; 0.001). Adjusted survival models suggested an independent 33% increase in all-cause mortality risk among those screening positive for social isolation (1.33 HR 95% CI 1.10, 1.62). Adjusted Poisson models found a similar increase in inpatient stays (1.36 IRR 95% CI 1.14, 1.62). Conclusions: Our findings corroborate the association between social isolation and morbidity and mortality among those with known ASCVD. The effect for social isolation was similar in magnitude to clinical comorbidities and smoking, suggesting that routine screening for social isolation may provide valuable information for assessing and managing the risk of death among patients with ASCVD.

Abstract 4133161: Variation in Prevalence, Treatment, and Outcomes in Heart Failure with Improved Ejection Fraction by Race and Ethnicity

Background: Racial and ethnic disparities exist in heart failure with reduced ejection fraction (HFrEF), but little is known about how race and ethnicity relate to patients with HF with improved EF (HFimpEF). Research Question: Do the epidemiology, treatment, and outcomes vary by race and ethnicity in patients with HFimpEF? Aim: To describe the relationship between race and ethnicity and HFimpEF within a large, integrated health care delivery system. Methods: We identified adults aged ≥18 years with incident HFrEF (LVEF≤40%) from 2013-2018 within Kaiser Permanente Northern California. HFimpEF was defined as LVEF&gt;40% within 12 months after incident HFrEF. Self-reported race and ethnicity were classified as non-Hispanic White, non-Hispanic Black, Asian American/Native Hawaiian/Pacific Islander (AANHPI), Hispanic, and other. Incidence rates of worsening HF (WHF) events (i.e., HF hospitalization, ED visit, or urgent outpatient WHF visits) or all-cause death were compared across patients with HFimpEF and persistent HFrEF using Cox proportional hazard models adjusted for age, sex, and LVEF at incident HFrEF, stratified by race and ethnicity. Results: Among 12,639 adults with incident HFrEF, 7,562 (59.8%) were White, 1,481 (11.7%) were AANHPI, 1,385 (11.0%) were Black, and 1,537 (12.2%) identified as Hispanic. Rates of HFimpEF following incident HFrEF was lowest among Black patients (26%), but similar among other race and ethnicities (36%, 34%, 30%, and 30% for AANHPI, White, Hispanic, and other, respectively, chi-squared p&lt;0.01). Medication use was similar across groups at time of HFimpEF, but generally declined thereafter (Panel A) . Among patients with HFimpEF, Black and Hispanic patients had significantly higher crude rates of WHF or death compared to White patients (34 and 30 compared to 23 per 100 person-years, p&lt;0.01 for each). Despite these differences in absolute rates, relative associations between HFimpEF (vs. persistent HFrEF) and WHF or death remained similar across all race and ethnicities (AANHPI: aHR=0.52 [95%CI 0.42-0.65], Black: aHR=0.70 [95%CI 0.56-0.87], Hispanic: aHR=0.60 [95%CI 0.49-0.73], White: aHR=0.53 [95%CI 0.48-0.58], p interaction =0.13) (Panel B) . Conclusions: HFimpEF is common within 12 months after incident HFrEF, and HF medication adherence declines in the years following. HFimpEF is associated with improved clinical outcomes across race and ethnicity, but occurs less frequently in Black patients despite similar HF medical therapy use.

Abstract 4138433: Prevalence, Clinical Characteristics, and Outcomes in Heart Failure with Improved Ejection Fraction by Chronological Age

Background: HF incidence increases with age. Modern treatments have led to more patients recovering LVEF, classified as HF with improved ejection fraction (HFimpEF). However, the age-related epidemiology and prognosis of HFimpEF remain unclear. Hypothesis: Compared to younger patients, older patients will have lower rates of HFimpEF after incident HFrEF and higher rates of HF-related morbidity and mortality. Aims: To describe the clinical characteristics and outcomes in HFimpEF across the age spectrum within a healthcare delivery system in the US. Methods: We identified adults ≥18 years with incident HFrEF (LVEF≤40%) between 2013-2018 within Kaiser Permanente Northern California (KPNC), a healthcare system serving 4.5 million members. HFimpEF was defined as baseline LVEF &lt;40% with subsequent &gt;10% improvement to &gt;40%. HFimpEF incidence was assessed by baseline age categories (&lt;50, 50-64, 65-79, ≥80 years [yrs]). Rates of worsening HF (WHF) events (i.e. HF-related hospitalization, ED, or outpatient visits) were compared between HFimpEF and persistent HFrEF patients across age using Cox proportional hazards models adjusted for sex and EF at the time of incident HFrEF, including potential interaction by age modeled continuously (cubic splines with 3 knots). Data: Among 12,639 adults with incident HFrEF, 33% experienced HFimpEF, with lower rates at older ages: 42% (&lt;50 yrs), 41% (50-64 yrs), 35% (65-79 yrs) and 18% (≥80 yrs). Among patients with HFimpEF alive at 1-year post-HFrEF (N=9954), WHF incidence (per 100 p-y) remained high (10.7) in younger (&lt;50 yrs) patients and increased by age: 14.5 (50-64 yrs), 21.6 (65-79 yrs), and 33.7 (≥80 yrs)(P &lt;0.001 for trend; Figure, Panel A). Patients with HFimpEF, compared to those with persistent HFrEF, had lower adjusted rates of WHF across the spectrum of age (pinteraction by age &lt; 0.001; Figure, Panel B). Conclusion: HFimpEF is common within a year of incident HFrEF, more prevalent in younger patients, and is associated with significant residual clinical risk. Compared to persistent HFrEF, improvements in LVEF are associated with a lower risk of WHF or death. Additional research is needed to understand HF symptom burden and medical therapy use in this population.

Exploring the Variability in Triage Nursing Workload: Insights From a Multicentre Observational Study.

Although there has been a significant amount of research on nurse workloads in hospital environments, there has been a lack of comprehensive investigation of the workload of triage nurses. This study assesses the workload fluctuations of triage nurses in various emergency departments in the same region and examines how workload varies based on emergency department visit volumes and seasonal fluctuations. The study is a retrospective, multicentre, observational study from January 1, 2019, to December 31, 2023, in seven Italian emergency departments, gathering information on all patients who went through the triage process. We documented the number of nurses present throughout each shift and adjusted the data to account for the number of patients attended to by each triage nurse per shift. The EDs were classified into high-inflow, medium-inflow and low-inflow categories according to the annual number of patients they served. The study included 1,223,331 emergency department triage assessments. During daytime shifts, triage nurses in high-inflow emergency departments assessed a median of 74 patients, while those in medium-inflow and low-inflow emergency departments assessed 63 and 32 patients, respectively. During nighttime shifts, triage nurses in high-inflow emergency departments assessed 26 patients, compared to 14 in medium-inflow and 5 in low-inflow emergency departments. Significant seasonal fluctuations in the workload of triage nurses were observed. This study reveals substantial disparities in the number of patients triage nurses assess, which vary according to emergency department patient inflow volumes and seasonal factors. The findings emphasise the need for more standardised and equitable workload distribution among triage nurses. Future research should aim to establish a systematic nurse staffing model for triage to ensure manageable workloads and maintain patient safety. The Strengthening the Reporting of Observational Studies in Epidemiology was used. No patient or public contribution.

Abstract 4117856: Effects of a Nurse-led Common-sense Model of Self-regulation-Based Heart Failure Self-care Program on Patient Outcomes: A Randomized Controlled Trial

Introduction: Guidelines have recognized the critical role of self-care in heart failure (HF), but people with HF do not adequately practice self-care. The Common-Sense Model (CSM) of Self-Regulation is a widely used theoretical framework for promoting behavior change and improving disease prognosis among patients. However, studies on the effects of the application of this model among people with HF are limited and present mixed results. Aims: To examine the effects of a nurse-led CSM of Self-Regulation-based self-care intervention on illness perceptions, self-care behaviors, self-care self-efficacy, self-care behaviors, health-related quality of life, depression, anxiety, symptom burden, sleep quality, healthcare service utilization, and mortality among people with HF. Methods: A randomized controlled trial was conducted. Participants were recruited from a university-affiliated hospital and randomized at a 1:1 ratio into the intervention or the control groups. Participants in the intervention group received a 6-week nurse-led CSM of Self-Regulation-based self-care program and usual care. Control group participants only received the usual care. Outcomes of interest were measured at baseline, 6 weeks (T1), and 3 months (T2) after enrollment. The generalized estimating equations model and Mann-Whitney U test were used to examine the intervention effects on the study outcomes. Results: 138 subjects were enrolled in the study between March and May 2023. Participants in the intervention showed statistically greater improvements in illness perceptions, self-care self-efficacy, self-care behaviors, health-related quality of life, depression, symptom burden, and sleep quality compared with the controls at T1 and T2. We also observed a statistically significant reduction in the number of HF-related unscheduled outpatient department visits in the intervention group compared to the control group at T2. However, no significant differences were found in anxiety, number of HF-related hospital readmissions, length of HF-related hospital stays, number of HF-related emergency department visits, or HF-related mortality between the study groups at T1 and T2. Conclusion: Our program generates favorable effects on promoting behavior change and improving health outcomes among people with HF. It also fills the knowledge gaps around the application of CSM of Self-Regulation in people with HF and provides more empirical evidence supporting the effectiveness of nurse-led interventions.