Asthma Emergency Department Visits Research Articles

Wildfire Smoke: Health Effects, Mechanisms, and Mitigation.

Wildfires are becoming more frequent and intense on a global scale, raising concerns about their acute and long-term effects on human health. We conducted a systematic review of the current epidemiological evidence on wildfire health risks and a meta-analysis to investigate the association between wildfire smoke exposure and various health outcomes. We discovered that wildfire smoke increases the risk of premature deaths and respiratory morbidity in the general population. Meta-analysis of cause-specific mortality and morbidity revealed that wildfire smoke had the strongest associations with cardiovascular mortality (RR: 1.018, 95% CI: 1.014-1.021), asthma hospitalization (RR: 1.054, 95% CI: 1.026-1.082), and asthma emergency department visits (RR: 1.117, 95% CI: 1.035-1.204) in the general population. Subgroup analyses of age found that adults and elderly adults were more susceptible to the cardiopulmonary effects of wildfire smoke. Next, we systematically addressed the toxicological mechanisms of wildfire smoke, including direct toxicity, oxidative stress, inflammatory reactions, immune dysregulation, genotoxicity and mutations, skin allergies, inflammation, and others. We discuss wildfire smoke risk mitigation strategies including public health interventions, regulatory measures, and personal actions. We conclude by highlighting current research limitations and future directions for wildfire research, such as elucidating the complex interactions of wildfire smoke components on human health, developing personalized risk assessment tools, and improving resilience and adaptation strategies to mitigate the health effects of wildfires in changing climate.

36 The long-term consequences of short-course systemic corticosteroid therapy for childhood acute asthma exacerbations

Abstract Background Paediatric emergency department (ED) asthma guidelines recommend the administration of short-course systemic corticosteroids (SCS) for moderate to severe asthma exacerbations. The potential adverse implications of frequent, short-course SCS in children are poorly characterized. Objectives To determine the risk of adverse outcomes in children with asthma who receive multiple short-courses of SCS for asthma exacerbation management. Design/Methods In this population-based, retrospective cohort study, we identified children aged 1-16 years with an ED asthma presentation/hospitalization between October 1, 2017, and February 28, 2020. We divided participants into an SCS-exposed and unexposed cohort. A minimum washout period of 3 years was applied to exclude any SCS use before the index date. During a 24-month follow-up period, we captured cumulative short-courses of SCS for acute asthma management and the primary outcome, development of steroid-associated complications. We excluded participants with steroid-treated comorbidities, non-asthma-related SCS exposure and development of adverse outcome(s) before the index visit. We compared baseline characteristics between cohorts using descriptive statistics. A Prentice-Williams-Peterson model was used to determine the risk of adverse outcomes amongst children receiving SCS for asthma management with results expressed as adjusted hazard ratios (HR) and 95% Wald confidence intervals (CI). Results We identified 1468 participants with an asthma ED visit who received ≥1 SCS course for acute management and 541 participants who did not receive SCS during our study window, after applying inclusion/exclusion criteria. Baseline demographics were balanced between cohorts aside from age at index, which was significantly younger (4.31 ± 3.71 vs 7.64 ± 4.21 p<0.001) in the SCS-exposed cohort. Overall, the risk of developing a recurrent SCS-associated adverse outcome was not increased in the SCS-exposed cohort (HR = 0.95, 95% CI: 0.74-1.23, p=0.7). However, when the number of SCS courses was considered, a significant risk of recurrent SCS-associated outcomes emerged, especially for those receiving 4+ SCS courses (HR = 2.30, 95% CI: 0.92-5.80). This potential dose-response effect was negated when patients who were likely on medium to high dose maintenance inhaled corticosteroids, were removed in a sensitivity analysis (HR = 1.38, 95% CI: 0.35-5.39). Conclusion At a tertiary care Canadian paediatric hospital, children and adolescents receiving short-course SCS for asthma exacerbation management overall do not demonstrate an increased risk of developing complications after two years follow-up. However, complication risk may be increased among those receiving 4+ cumulative SCS courses.

EVs meet health: A complex-systems policy integration approach for electric vehicle adoption and its impact on respiratory and cardiovascular disease

The transition from gasoline-combustion to zero-emission vehicles represents one of the most ambitious public and private enterprises around the globe to mitigate air pollution and its subsequent effects on climate change. The present study uses the rapid transition in the state of California to analyze the connections between the increasing utilization of electric vehicles (EVs) and two critical health outcomes: Asthma and acute myocardial infarction (AMI) emergency department (ED) visits. We fit simultaneous quantile and interquartile-range regression models to health and sociodemographic data from the California Office of Health and Hazard Assessment and electric vehicles registration data, 2011–2017. Results show that changes in EV utilization, from 2011 to 2013 to 2015–2017, have larger and more favorable effects as asthma and AMI deteriorate across zip codes. Looking at zip codes located at the 75th and 25th percentiles of the change in the asthma- and AMI-related ED visits distribution, a 5-percentage points change in the EV-to-gasoline combustion utilization ratio is associated with a 25-percentage points (p<.01) and 12.5-percentage points (p<.01) decline in asthma- and AMI-related ED visits, respectively. Our findings also suggest that, should the U.S. meet the goals of Executive Order N-79-20 by 2035, we could observe about 37,000 fewer asthma-related ED visits (95% CI: 16,154–59,280) per year, with an overall possible annual savings of about $65.5 million dollars (95% CI: $29.1M – $106.7M), and a possible decline of about 19,292 AMI-related hospitalizations, with possible annual savings of about $425 million dollars (95% CI: $365M – $509M). Our findings are optimistic in that spillover effects from increasing EV utilization can reduce healthcare costs while improving population health. Research should point toward the development of public-private coalitional strategies to effectively bridge usually disparate sectors of the economy and policy-making like energy and health.

Assessing the implementation of a tertiary care comprehensive pediatric asthma education program using electronic medical records and decision support tools

Background Self-management education is integral for proper asthma management. However, there is an accessibility gap to self-management education following asthma hospitalizations. Most pediatric patients and their families receive suboptimal or no education. Objective To implement a comprehensive pediatric asthma education program and evaluate subsequent self-management knowledge in patients as well as behavior change outcomes reflected in the frequency of asthma related repeat emergency department visits and hospitalization. The program implementation was informed by the Knowledge to Translation Action Framework and the i-PARIHS model for quality improvement and involved several iterative stages. Methods We implemented a comprehensive asthma education program for the families of all children 0-18 years old who had been admitted for an asthma exacerbation to the Children’s Hospital of Eastern Ontario (CHEO), beginning on April 1, 2018. The program was adapted to the stages of the Knowledge Translation to Action Framework including undertaking an environmental scan, expert stakeholder feedback, reviews, addressing barriers, and tailoring the intervention, along with evaluating knowledge and health outcomes. Education was delivered over 1-2 h in personalized individual or small group settings, within 4 wk of hospital discharge. All education was provided by registered nurses or respiratory therapists who were also certified asthma educators. The EPIC electronic medical record was used to facilitate referral and scheduling of asthma education sessions, and to track subsequent acute asthma visits. We compared the frequency of a repeat asthma emergency department (ED) visit or hospitalization within 1-year following an initial asthma hospitalization for children who would have received comprehensive asthma education, to a historical cohort of children who were hospitalized between April 9, 2017 – Apr 8, 2018, and did not receive asthma education. Results The program had a high enrollment, capturing nearly 75% of the target population. Most families found the program to be acceptable and reported increased knowledge of how to manage asthma. We identified a crude overall 54% reduction in repeat hospitalizations among children 1 year after implementation of the asthma education program (i.e. 10.2% (23/225) repeat hospitalization rate pre- implementation versus 4.8% (11/227) post-implementation). In adjusted time-to event analysis, this reduction was prominent at 3 months among those who received comprehensive asthma education, relative to those who did not, but this improvement was not sustained by 1 year (HR =1.1, 95% CI =0.55- 2.05; p-value = 0.6). Discussion Although we did not find long-term improvements in ED visits, or hospitalizations, in children of caregivers who participated in comprehensive asthma education, the asthma education program holds potential given that most patients found it to be acceptable and that it increased asthma management knowledge. A future asthma education program should include multiple sessions to ensure that the knowledge and behavior change will be sustained, leading ultimately to long-term reductions in repeat ED visits and hospitalizations.

Impact of Wildfire Smoke on Pediatric Asthma Hospital and Emergency Department Visits in Northern California

Impact of Wildfire Smoke on Pediatric Asthma Hospital and Emergency Department Visits in Northern California

Tenant Reports of Poor Housing Conditions Are Associated with Neighborhood Rate of Childhood Asthma Emergency Department Visits in Boston, MA

Tenant Reports of Poor Housing Conditions Are Associated with Neighborhood Rate of Childhood Asthma Emergency Department Visits in Boston, MA

Poor housing conditions are associated with neighborhood variation in childhood asthma emergency department visit rates in Austin, Texas

Poor housing conditions are associated with neighborhood variation in childhood asthma emergency department visit rates in Austin, Texas

PM2.5 and its components and respiratory disease healthcare encounters – Unanticipated increased exposure-response relationships in recent years after environmental policies

Prior studies reported excess rates (ERs) of cardiorespiratory events associated with short-term increases in PM2.5 concentrations, despite implementation of pollution-control policies. In 2017, Federal Tier 3 light-duty vehicle regulations began, and to-date there have been no assessments of population health effects of the policy. Using the NYS Statewide Planning and Research Cooperative System (SPARCS) database, we obtained hospitalizations and ED visits with a principal diagnosis of asthma or chronic obstructive pulmonary disease (COPD) for residents living within 15 miles of six urban PM2.5 monitoring sites in NYS (2014–2019). We used a time-stratified case-crossover design and conditional logistic regression (adjusting for ambient temperature, relative humidity, and weekday) to estimate associations between PM2.5, POC (primary organic carbon), SOC (secondary organic carbon), and rates of respiratory disease hospitalizations and emergency department (ED) visits from 2014 to 2019. We evaluated demographic disparities in these relative rates and compared changes in ERs before (2014–2016) and after Tier 3 implementation (2017–2019). Each interquartile range increase in PM2.5 was associated with increased ERs of asthma or COPD hospitalizations and ED visits in the previous 7 days (ERs ranged from 1.1%–3.1%). Interquartile range increases in POC were associated with increased rates of asthma ED visits (lag days 0–6: ER = 2.1%, 95% CI = 0.7%, 3.6%). Unexpectedly, the ERs of asthma admission and ED visits associated with PM2.5, POC, and SOC were higher during 2017–2019 (after Tier 3) than 2014–2016 (before Tier-3). Chronic obstructive pulmonary disease analyses showed similar patterns. Excess Rates were higher in children (<18 years; asthma) and seniors (≥65 years; COPD), and Black, Hispanic, and NYC residents. In summary, unanticipated increases in asthma and COPD ERs after Tier-3 implementation were observed, and demographic disparities in asthma/COPD and PM2.5, POC, and SOC associations were also observed. Future work should confirm findings and investigate triggering of respiratory events by source-specific PM.

Sex and age characteristics of thunderstorm asthma emergency department visits

Severe asthma has been shown to occur in the combined presence of high pollen and thunderstorm conditions, also known as ‘thunderstorm asthma.’ First studied as severe epidemic events, recent longitudinal work studied less dramatic but more frequent occurrences. We explore thunderstorm asthma-related emergency department visits in the Minneapolis-St. Paul metropolitan area and evaluated risk differences by sex and age. We define a thunderstorm asthma exposure event as the daily occurrence of 2 or more lightning strikes during high pollen periods, and use daily counts of asthma-related emergency department visits to estimate relative and absolute risk of severe asthma during thunderstorm asthma events for the full population and for sex and age subgroups. The overall population had a 1.06 (95 % CI: 1.02, 1.09) times higher risk of asthma-related ED visits during thunderstorm asthma events compared to days without thunderstorm asthma events. Children under 18 show no higher risk (RR 1.02; 95 % CI: 0.97 1.08), but adults 18–44 years (RR 1.08; 95 % CI: 1.02, 1.13) and 45 and up (RR 1.08; 95 % CI 1.02, 1.15) show higher relative risk. Absolute risk measures show similar patterns to the age and sex results, but age-sex subgroups show more variation in absolute vs relative risk. Our results support an association between ED visits and thunderstorm asthma and provide evidence of varying risks by sex across the life course. These differences in risk have implications for clinical treatment of this allergic type of asthma and for future research into this poorly recognized environmental exposure.Plain Language Summary: Recent research has highlighted the existence of Thunderstorm asthma events, a phenomenon in which pollen grains rupture in the conditions that occur with a thunderstorm, releasing sub-pollen particles that are capable of triggering severe asthma in susceptible populations. Where severe asthma is a disease that usually impacts children, we find in this study that asthma ED visits associated with thunderstorm asthma events more frequently impact adults, particularly males 18–44 and females 45 and up.

Glucagon-like Peptide 1 Receptor Agonists and Asthma Exacerbations: Which Patients Benefit Most?

While recent evidence suggested glucagon-like peptide 1 receptor agonists (GLP1RA) may reduce the risk of asthma exacerbations, it remains unclear which subpopulations might derive the most benefit from GLP1RA treatment. To identify characteristics of patients with asthma that predict who might benefit the most from GLP1RA treatment using real-world data. We implemented an active-comparator, new-user design analysis using commercially insured patients ages 18-65 from Marketscan data 2007-2019 and identified two cohorts: GLP1RA vs thiazolidinediones and GLP1RA vs sulfonylureas. The outcome was acute exacerbation of asthma (hospital admission or emergency department (ED) visit for asthma) within 180 days after initiation. We applied iterative causal forest (iCF), a novel causal machine learning subgrouping algorithm, to assess HTE. In identified subgroups, we predicted propensity score, conducted propensity score trimming, and then estimated adjusted risk differences (aRD) for the effect of GLP1RA relative to comparators on asthma exacerbation using inverse probability treatment weighting in propensity score trimmed subpopulation. Among 10,989 patients initiating GLP1RA or thiazolidinediones and 17,088 patients initiating GLP1RA vs sulfonylurea, GLP1RA initiators had fewer exacerbations with an aRD of -0.5% (95% CI -1.1% to 0.1%) and -1.6% (95% CI -2.2% to -1.1%), respectively. In the GLP1RAvsSUcohort where we observed beneficial effect, our iCF analysis identified 5 subgroups with different treatment effects, defined by number of ED visits, number of prescriptions of short-acting beta2-agonsit (SABA), number of prescriptions of inhaled steroid (ICS) and long-acting beta-agonists (LABA) (either combination therapy or concurrent use), and aged 50+. Among these, patients with 2+ ED visits during 12-month baseline period had the largest absolute exacerbation risk reduction, with a decrease of 2.8% for GLP1RA (95% CI: -4.8% to -0.9%). GLP1RA demonstrated beneficial effect on reducing asthma exacerbation relative to sulfonylureas. Asthma patients with 2+ ED visits (a proxy for disease severity) benefit most from GLP1RA. ED visit frequency, and number of maintenance and reliever inhalers, and age may help individualize prediction of the short-term benefit from GLP1RA on asthma exacerbation.

A real-world evaluation of the effectiveness and Sufficiency of Current Emergency Department Preventative Strategies for Reducing Emergency Department revisits in a Canadian children’s hospital: a retrospective cohort study

BackgroundDespite asthma guidelines’ recommended emergency department preventative strategies (EDPS), repeat asthma-related emergency department (ED) visits remain frequent.MethodsWe performed a retrospective cohort study of children aged 1–17 years presenting with asthma to the Children’s Hospital of Eastern Ontario (CHEO) ED between September 1, 2014 – August 31, 2015. EDPS was defined as provision of education on trigger avoidance and medication technique plus documentation of an asthma action plan, a prescription for an inhaled controller medication or referral to a specialist. Logistic regression was used to identify factors associated with receipt of EDPS. We further compared the odds of repeat presentation to the ED within the following year among children who had received EDPS versus those who had not.Results1301 patients were included, and the mean age of those who received EDPS was 5.0 years (SD = 3.7). Those with a moderate (OR = 3.67, 95% CI: 2.49, 5.52) to severe (OR = 3.69, 95% CI: 2.50, 5.45) asthma presentation were most likely to receive EDPS. Receiving EDPS did not significantly reduce the adjusted odds of repeat ED visits, (OR = 0.82, 95% CI: 0.56, 1.18, p = 0.28).ConclusionsPatients with higher severity asthma presentations to the ED were more likely to receive EDPS, but this did not appear to significantly decrease the proportion with a repeat asthma ED visit. These findings suggest that receipt of EDPS in the ED may not be sufficient to prevent repeat asthma ED visits in all children.

Impact of the 2022 New Mexico, US wildfires on air quality and health

The 2022 wildfires in New Mexico, United States, were unparalleled compared to past wildfires in the state in both their scale and intensity, resulting in poor air quality and a catastrophic loss of habitat and livelihood. Among all wildfires in New Mexico in 2022, six wildfires were selected for our study based on the size of the burn area and their proximity to populated areas. These fires accounted for approximately 90 % of the total burn area in New Mexico in 2022. We used a regional chemical transport model and data-fusion technique to quantify the contribution of these six wildfires (April 6 to August 22) on particulate matter (PM2.5: diameter ≤ 2.5 μm) and ozone (O3) concentrations, as well as the associated health impacts from short-term exposure. We estimated that these six wildfires emitted 152 thousand tons of PM2.5 and 287 thousand tons of volatile organic compounds to the atmosphere. We estimated that the average daily wildfire smoke PM2.5 across New Mexico was 0.3 μg/m3, though 1 h maximum exceeded 120 μg/m3 near Santa Fe. Average wildfire smoke maximum daily average 8-h O3 (MDA8-O3) contribution was 0.2 ppb during the study period over New Mexico. However, over the state 1 h maximum smoke O3 exceeded 60 ppb in some locations near Santa Fe. Estimated all-cause excess mortality attributable to short term exposure to wildfire PM2.5 and MDA8-O3 from these six wildfires were 18 (95 % Confidence Interval (CI), 15–21) and 4 (95 % CI: 3–6) deaths. Additionally, we estimate that wildfire PM2.5 was responsible for 171 (95 %: 124–217) excess cases of asthma emergency department visits. Our findings underscore the impact of wildfires on air quality and human health risks, which are anticipated to intensify with global warming, even as local anthropogenic emissions decline.

Neighborhood-level variability in asthma-related emergency department visits in Central Texas

The extent to which incidence rates of asthma-related emergency department (ED) visits vary from neighborhood to neighborhood and predictors of neighborhood-level asthma ED visit burden are not well understood. We aimed to describe the census tract-level spatial distribution of asthma-related ED visits in Central Texas and identify neighborhood-level characteristics that explain variability in neighborhood-level asthma ED visit rates. Conditional autoregressive models were used to examine the spatial distribution of asthma-related ED visit incidence rates across census tracts in Travis County, Texas, and assess the contribution of census tract characteristics to their distribution. There were distinct patterns in ED visit incidence rates at the census tract scale. These patterns were largely unexplained by socioeconomic or selected built environment neighborhood characteristics. However, racial and ethnic composition explained 33% of the variability of ED visit incidence rates across census tracts. The census tract predictors of ED visit incidence rates differed by racial and ethnic group. Variability in asthma ED visit incidence rates are apparent at smaller spatial scales. Most of the variability in census tract-level asthma ED visit rates in Central Texas is not explained by racial and ethnic composition or other neighborhood characteristics.

Black-White Disparities in Asthma Hospitalizations and ED Visits Among Medicaid-Enrolled Children.

Asthma is a common, potentially serious childhood chronic condition that disproportionately afflicts Black children. Hospitalizations and emergency department (ED) visits for asthma can often be prevented. Nearly half of children with asthma are covered by Medicaid, which should facilitate access to care to manage and treat symptoms. We provide new evidence on racial disparities in asthma hospitalizations and ED visits among Medicaid-enrolled children. We used comprehensive Medicaid claims data from the Transformed Medicaid Statistical Information System. Our study population included 279 985 Medicaid-enrolled children with diagnosed asthma. We identified asthma hospitalizations and ED visits occurring in 2019. We estimated differences in the odds of asthma hospitalizations and ED visits for non-Hispanic Black versus non-Hispanic white children, adjusting for sex, age, Medicaid eligibility group, Medicaid plan type, state, and rurality. In 2019, among Black children with asthma, 1.2% had an asthma hospitalization and 8.0% had an asthma ED visit compared with 0.5% and 3.4% of white children with a hospitalization and ED visit, respectively. After adjusting for other characteristics, the rates for Black children were more than twice the rates for white children (hospitalization adjusted odds ratio 2.45, 95% confidence interval 2.23-2.69; ED adjusted odds ratio 2.42; 95% confidence interval 2.33-2.51). There are stark racial disparities in asthma hospitalizations and ED visits among Medicaid-enrolled children with asthma. To diminish these disparities, it will be important to implement solutions that address poor quality care, discriminatory treatment in health care settings, and the structural factors that disproportionately expose Black children to asthma triggers and access barriers.

A census tract-level assessment of social determinants of health, traffic exposure, and asthma exacerbations in New York State's Medicaid Population (2005–2015)

This study aims to evaluate the association between social determinants, environmental exposure metrics, and the risk of asthma emergency department (ED) visits in the New York State (NYS) Medicaid population using small-area analysis. Traffic densities for each census tract in NYS were calculated using the length of road segments within each tract and total area of the tract to produce a measure of average number of vehicles per square meter per day. Data on social determinants of health including internal and external environments and other demographic factors were obtained from various sources. Poisson regression analyses were conducted to identify significant factors associated with asthma ED visits in Medicaid claim and encounter data for years 2005–2015. High traffic density in NYS excluding New York City (NYC) correlated with increased risk of asthma ED visits (RR 1.69; 95% CI: 1.42, 2.00), mitigated by adjusting for environmental and social determinants (RR 1.00; 95% CI: 0.85, 1.19). Similar trends were observed in NYC only (RR 1.19; 95% CI: 1.00, 1.41), with the adjusted risk remaining elevated (RR 1.14; 95% CI: 0.98, 1.33) albeit not statistically significant. Living in census tracts with high concentrated disadvantage index, high proportions of minorities, and less green space predicted higher asthma ED visits. We mapped predicted rates and model residuals to identify areas of high risk. Our results support previous findings that environmental and social risk factors in poor and urban areas contribute to asthma exacerbations in the NYS Medicaid population, even if they may not necessarily contribute to its development.

Quantifying Multipollutant Health Impacts Using the Environmental Benefits Mapping and Analysis Program-Community Edition (BenMAP-CE): A Case Study in Atlanta, Georgia.

Air pollution risk assessments do not generally quantify health impacts using multipollutant risk estimates, but instead use results from single-pollutant or copollutant models. Multipollutant epidemiological models account for pollutant interactions and joint effects but can be computationally complex and data intensive. Risk estimates from multipollutant studies are therefore challenging to implement in the quantification of health impacts. Our objective was to conduct a case study using a developmental multipollutant version of the Environmental Benefits Mapping and Analysis Program-Community Edition (BenMAP-CE) to estimate the health impact associated with changes in multiple air pollutants using both a single and multipollutant approach. BenMAP-CE was used to estimate the change in the number of pediatric asthma emergency department (ED) visits attributable to simulated changes in air pollution between 2011 and 2025 in Atlanta, Georgia, applying risk estimates from an epidemiological study that examined short-term single-pollutant and multipollutant (with and without first-order interactions) exposures. Analyses examined individual pollutants (i.e., ozone, fine particulate matter, carbon monoxide, nitrogen dioxide (), sulfur dioxide, and particulate matter components) and combinations of these pollutants meant to represent shared properties or predefined sources (i.e., oxidant gases, secondary pollutants, traffic, power plant, and criteria pollutants). Comparisons were made between multipollutant health impact functions (HIF) and the sum of single-pollutant HIFs for the individual pollutants that constitute the respective pollutant groups. Photochemical modeling predicted large decreases in most of the examined pollutant concentrations between 2011 and 2025 based on sector specific (i.e., source-based) estimates of growth and anticipated controls. Estimated number of avoided asthma ED visits attributable to any given multipollutant group were generally higher when using results from models that included interaction terms in comparison with those that did not. We estimated the greatest number of avoided pediatric asthma ED visits for pollutant groups that include (i. e., criteria pollutants, oxidants, and traffic pollutants). In models that accounted for interaction, year-round estimates for pollutant groups that included ranged from 27.1 [95% confidence interval (CI): 1.6, 52.7; traffic pollutants] to 55.4 (95% CI: 41.8, 69.0; oxidants) avoided pediatric asthma ED visits. Year-round results using multipollutant risk estimates with interaction were comparable to the sum of the single-pollutant results corresponding to most multipollutant groups [e.g., 52.9 (95% CI: 43.6, 62.2) for oxidants] but were notably lower than the sum of the single-pollutant results for some pollutant groups [e.g., 77.5 (95% CI: 66.0, 89.0) for traffic pollutants]. Performing a multipollutant health impact assessment is technically feasible but computationally complex. It requires time, resources, and detailed input parameters not commonly reported in air pollution epidemiological studies. Results estimated using the sum of single-pollutant models are comparable to those quantified using a multipollutant model. Although limited to a single study and location, assessing the trade-offs between a multipollutant and single-pollutant approach is warranted. https://doi.org/10.1289/EHP12969.

Pediatric Asthma Exacerbations: 14-Day Emergency Department Return Visit Risk Factors

BackgroundAsthma, the most common chronic disease of childhood, can affect a child's physical and mental health and social and emotional development. ObjectiveThe aim of this study was to identify factors associated with emergency department (ED) return visits for asthma exacerbations within 14 days of an initial visit. MethodsThis was a retrospective review from Cerner Real-World Data for patients aged from 5 to 18 years and seen at an ED for an asthma exacerbation and discharged home at the index ED visit. Asthma visits were defined as encounters in which a patient was diagnosed with asthma and a beta agonist, anticholinergic, or systemic steroid was ordered or prescribed at that encounter. Return visits were ED visits for asthma within 14 days of an index ED visit. Data, including demographic characteristics, ED evaluation and treatment, health care utilization, and medical history, were collected. Data were analyzed via logistic regression mixed effects model. ResultsA total of 80,434 index visits and 17,443 return visits met inclusion criteria. Prior ED return visits in the past year were associated with increased odds of a return visit (odds ratio [OR] 2.12; 95% CI 2.07–2.16). History of pneumonia, a concomitant diagnosis of pneumonia, and fever were associated with increased odds of a return visit (OR 1.19; 95% CI 1.10–1.29; OR 1.15; 95% CI 1.04–1.28; OR 1.20; 95% CI 1.11–1.30, respectively). ConclusionsSeveral variables seem to be associated with statistically significant increased odds of ED return visits. These findings indicate a potentially identifiable population of at-risk patients who may benefit from additional evaluation, planning, or education prior to discharge.

Altered Symptom Perception in Children With Asthma Is Associated With Poor Childhood Opportunity and Adverse Outcomes

Effective asthma self-management requires that children recognize their asthma symptoms when they occur. However, some children have altered symptom perception, which impairs their ability to respond to their asthma symptoms in a timely manner. To characterize the prevalence and features of altered symptom perception in children aged 5 to 18 years. We hypothesized that children with altered symptom perception would have more features of uncontrolled asthma, more health inequity, and poorer longitudinal asthma outcomes over 12months. Children (N= 371) completed an outpatient research visit for clinical characterization. Altered symptom perception was defined by discordance between child responses on the 6-item Asthma Control Questionnaire and medical provider-elicited symptoms. Electronic medical records were reviewed for 12 months for the occurrence of an asthma exacerbation treated with systemic corticosteroids and an asthma exacerbation prompting an emergency department visit. Approximately 15% of children had altered symptom perception and their asthma features were similar to those of children with uncontrolled asthma. Children with altered symptom perception were uniquely distinguished by non-White race and more severe prior exacerbations. These children also resided in ZIP codes with the poorest childhood opportunity (ie, poorest education, health and environmental features, and socioeconomic features). Outcomes of children with altered symptom perception were equally disparate with approximately 2-fold higher odds of a future exacerbation and approximately 3-fold higher odds of an emergency department visit for asthma. Altered symptom perception is present in a small but significant number of children with asthma and is related to poorer childhood opportunity and other health inequities that require additional intervention.

Exposure to hourly ambient air pollutants and risk of emergency department visits for asthma: A multicenter time-stratified case-crossover analysis

BackgroundExposure to daily ambient air pollutants has been linked with increased risk of asthma morbidity and mortality. However, the association between exposure to air pollution and risk of emergency department (ED) visits for asthma on an hourly level remains unclear. MethodsWe conducted a time-stratified case-crossover design and included a total of 121,112 asthma ED visits from 11 hospitals in three cities located in Zhejiang province, China, between January 1, 2016 and September 30, 2021. We used conditional logistic regressions combined with a distributed lag linear model to estimate the association between risk of asthma ED visits and hourly exposure to fine particulate matter (PM2.5), respirable particulate matter (PM10), nitrogen dioxide (NO2), sulfur dioxide (SO2), ozone (O3), and carbon monoxide (CO) after adjusted for meteorological factors and public holiday. ResultsHourly exposure to PM2.5, PM10, NO2, SO2, and CO was associated with an increased risk of asthma ED visits. This association was most pronounced in the concurrent hour of exposure (lag 0 h), rapidly attenuated over a period of 3–12 h, and diminished thereafter. Each interquartile range increase in air pollutant over 0–72 h was associated with increased risk of asthma ED visits by 7.0% (95% confidence interval [CI]: 5.4%, 8.6%) for PM2.5, 6.7% (95% CI: 5.1%, 8.2%) for PM10, 18.1% (95% CI: 15.4%, 21.0%) for NO2, 6.5% (95% CI: 4.8%, 8.2%) for SO2, and 7.4% (95% CI: 5.6%, 9.1%) for CO. ConclusionOur findings suggest that hourly exposure to PM2.5, PM10, NO2, SO2, and CO, but not O3, is associated with increased risk of ED visits for asthma shortly after exposure.

Effect of the Telemedicine Enhanced Asthma Management Through the Emergency Department (TEAM-ED) Program on Asthma Morbidity: A Randomized Controlled Trial

ObjectiveTo test the effectiveness of a telemedicine-based program in reducing asthma morbidity among children who present to the emergency department (ED) for asthma, by facilitating primary care follow-up and promoting delivery of guideline-based care. Study DesignWe included children (3-12 years) with persistent asthma who presented to the ED for asthma, were then randomly assigned to Telemedicine Enhanced Asthma Management through the Emergency Department (TEAM-ED) or enhanced Usual Care (eUC). TEAM-ED included: 1) school-based telemedicine follow-ups, completed by a primary care provider, 2) “point-of-care” prompting to promote guideline-based care, and 3) an opportunity for two additional telemedicine follow-ups. The primary outcome was the mean number of symptom-free days (SFDs) over 2 weeks at 3, 6, 9, and 12 months. ResultsWe included 373 children from 2016 through 2021 (participation rate 68%; 54% Black, 32% Hispanic, 77% public insurance, mean age: 6.4 years). Demographic characteristics and asthma severity were similar between groups at baseline. Most (91%) TEAM-ED children had ≥1 telemedicine visit; 41% completed 3 visits. At 3 months, caregivers of children in TEAM-ED reported more follow-up visits (66%vs.48%, aOR:2.07 [1.28-3.33]), preventive asthma medication actions (90%vs.79%, aOR:3.28 [1.56-6.89]), and use of a preventive medication (82%vs.69%, aOR:2.716 [1.45-5.08]), compared with eUC. There was no difference between groups in medication adherence or asthma morbidity. When only pre-pandemic data were included, there was greater improvement in SFDs over time for children in TEAM-ED versus eUC. ConclusionsTEAM-ED significantly improved follow-up and preventive care after an ED visit for asthma. We also saw improved SFDs with pre-pandemic data. The lack of overall improvement in morbidity and adherence indicates the need for additional ongoing management support.