Asthma Admissions Research Articles

The association between composite measures of social vulnerability and PICU admission for status asthmaticus.

Current knowledge of the impact of socioeconomic factors on the risk of admission to the pediatric intensive care unit (PICU) for asthma is limited. Using composite measures of social vulnerability-Social Vulnerability Index (SVI) and Child Opportunity Index (COI) 2.0-we compared patients admitted for status asthmaticus to the PICU and pediatric ward at Children's Hospital Los Angeles (CHLA). We hypothesized patients with a high SVI and low COI are at higher risk for PICU admission. Patients were identified using ICD-10 codes for asthma. Primary outcome was admission to PICU versus ward for status asthmaticus. Patient-registered residential street addresses were geocoded and spatially joined to SVI and COI 2.0 data at the census tract level. Univariate and regression analyses using the patient's SVI, COI 2.0, and admission location were conducted. From January 2017 to March 2022, there were 2458 admissions matched to addresses from 1983 distinct patients. The overall median SVI for all patients was 0.86 (IQR 0.6, 0.9). Overall median COI was 25.0 (IQR 10, 50). There was no difference in SVI or COI for admission to the PICU versus the ward. However, children requiring multiple hospital admissions for asthma were associated with higher SVI and lower COI. Children admitted to CHLA for asthma had an elevated SVI and low COI. There was no difference between admission locations based on SVI or COI scores. This indicates we care for children at increased socioeconomic risk, but this did not increase PICU use for asthma.

55 Post-pandemic paediatric asthma admissions: Clinical characteristics and outcomes of children hospitalized with asthma in 2022: The READAPT-Kids study cohort

Abstract Background Asthma exacerbations triggered by acute respiratory infections (ARIs) are a major cause of hospitalizations in children. There were large reductions in asthma admission during the SARS-CoV2 pandemic. Following the relaxation of public health interventions, there was a resurgence in admissions for ARIs. The effect of this rebound in ARIs on asthma management practices and outcomes is not well understood. Objectives To describe sociodemographic characteristics, etiology, management, and clinical outcomes of children and youth under the age of 18 years admitted to a tertiary care paediatric hospital with an acute asthma exacerbation from July 1, 2022 to Dec 31, 2022. Design/Methods An observational cohort study of children and youth less than 18 years, hospitalized with an acute asthma exacerbation from July 1, 2022 to Dec 31, 2022 at a single large Canadian children’s hospital. This was a subgroup analysis of the READAPT-Kids study cohort (Clinical chaRacteristics and outcomEs of hospitAlized children with Acute resPiratory infecTions.) Cases were identified using ICD-10-CA codes, then manually screened for inclusion. Detailed clinical and demographic information was extracted. Results Among 551 patients hospitalized with an ARI, 29.2% (n=161) were diagnosed with an asthma exacerbation. 99 were male (61.5%) with a median age of 3.8 years (IQR 2.2-6.3). 41.3% (n=64) had a previously documented asthma history, and of those, only 16.9% were taking any form of asthma therapy at admission. In hospital, 91.4% were given systemic corticosteroids, 86.5% had at least 1 viral pathogen identified, 72.2% had a chest x ray, 42.1% received antibiotics, and 23.7% had high flow nasal cannula oxygen outside of the paediatric intensive care (PICU). 22.4% (n=36), were admitted to the PICU, and 3.7% required invasive mechanical ventilation, there were no patient deaths. Median length of stay was 2.6 days (IQR 1.7–4.6 days). At discharge, 79.5% were prescribed regular inhaled corticosteroid therapy. Conclusion Asthma admissions accounted for a significant proportion of children hospitalized with ARIs in the post-pandemic era, with one fifth requiring transfer to PICU. CXR and antibiotic usage were high. Over 80% of those with a previous diagnosis of asthma were not taking inhaled corticosteroids at the time of admission.

64 Respiratory outcomes by five years of age among children born preterm: A population-based study using health services data

Abstract Background While neonatal care advancements have led to increased survival of preterm infants, many experience ongoing respiratory complications. Objectives Healthcare administrative data offers a comprehensive measure of neonatal outcomes. Our study used population-based data to describe rates of healthcare contacts for respiratory disease among children born preterm. Design/Methods A retrospective cohort of infants born in British Columbia between 2004-2014 was identified using a provincial birth registry. By linking to population-based healthcare data, we captured population demographics, birth data, and healthcare visits for respiratory causes [outpatient visits, hospitalizations, and intensive care (ICU) admissions] up to 5 years of age. The rate of healthcare visits due to asthma, bronchiolitis, and pneumonia were compared between preterm (22-36 weeks) and term/post-date infants (37-44 weeks GA) using Poisson regression. Results Children born at term (n=413,140) were compared to children born at 34-36 week GA (n=33,227), 28-33 week GA (n=8362), and 22-27 week GA (n=1231). Compared to term infants, rates of hospitalizations and ICU admission for all respiratory causes were higher among children born preterm. Children born 22-27 weeks GA had the highest rates of hospitalization for asthma [rate ratio (RR) 9.4, 95% CI 7.9-11.1], bronchiolitis (RR 10.5, 95% CI 9.3-11.8) and pneumonia (RR 15.9, 95% CI 14.3-17.7). Rates of ICU admission for asthma (RR 27.1, 95% CI 17.2-40.4) and pneumonia (RR 58.1, 95% CI 46.6-71.7) were highest among 22-27 week GA infants. Increased rates persist among children born 34-36 weeks GA, with higher rates of hospitalization for asthma (RR 1.8, 95% CI 1.6-1.9), bronchiolitis (RR 2.1, 95% CI 2.0-2.2), and pneumonia (RR 1.8, 95% CI 1.7-2.0) compared to term infants. Conclusion Preterm infants experience significantly higher rates of outpatient visits, hospitalizations, and ICU admissions for respiratory disease compared to term infants. Healthcare utilization, including ICU admissions, increased with decreasing gestational age. Of note, increased rates of respiratory disease were also found among infants born 34-36 weeks GA. Our study is the first to use population based data to describe rates of healthcare contacts for respiratory disease among preterm infants, providing insight to long-term respiratory disease burden.

Seasonal variations and social disparities in asthma hospitalizations and outcomes

Objective Exposure to asthma exacerbating triggers may be dependent on the season and an individual’s social factors and subsequent means to avoid triggers. We assessed for seasonal variations and differential outcomes based on race and income in admissions for asthma in a United States nationwide assessment. Methods This retrospective study assessed adult hospitalizations for asthma 2016–2019 using the National Inpatient Sample. Hospitalizations were categorized by season: winter (December–February), spring (March–May), summer (June–August), fall (September–November). Multivariable linear and logistic regression were used to assess associations between season, race, income quartile (determined by the median income within a patient’s ZIP code), and outcomes. Results The study included 423,140 admissions with a mean age of 51 years, and 73% of the cohort being female and 56% non-white. Admissions peaked during winter (124, 145) and were lowest in summer (80,525). Intubation rates were increased in summer compared to winter (2.73 vs 1.93%, aOR = 1.19, 95% CI: 1.04–1.37) as were rates of noninvasive positive pressure ventilation (NIPPV) (7.92 vs 7.06%, aOR = 1.08, 95% CI: 1.00–1.17). Compared to white patients, intubation (2.53 vs 1.87%, absolute difference 0.66%, aOR = 1.14, 95% CI: 1.02–1.29) and NIPPV (9.95 vs 5.45%, absolute difference 4.5%, aOR = 1.69, 95% CI: 1.57–1.82) were increased in Black patients. No significant associations between income and clinical outcomes were found. Conclusions Asthma admission peak during winter, while summer admissions and non-white race are associated with higher rates of NIPPV and intubation. Public health initiatives and strategically timed outpatient visits could combat seasonal variation and social disparities in asthma outcomes.

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.

Study on the Association between Cesarean Section Birth and Asthma Risk in the Pediatric Population of the Health Area of Palencia between 1993 and 2020.

Both asthma prevalence and the percentage of cesarean sections have increased in parallel in recent years. Research studies suggest an increased risk of developing atopic diseases and asthma after cesarean section birth compared to vaginal delivery. The main objective of this study is to analyze the risk of asthma admission after cesarean section birth compared to vaginal delivery in the pediatric population. Retrospective observational analytical case-control study from 1993 to 2020. The cases include all admitted patients to our health area hospital, for patients aged 7 to 16 diagnosed with asthma. For each case, a control without a diagnosis of asthma is selected with the same age, and that has also caused an episode of admission. A total of 290 admission episodes with a diagnosis of asthma were obtained, caused by 155 patients. Out of these, 145 cases with documented delivery types were selected. For cases, 155 controls were selected. The historical proportion of cesarean sections in the asthmatic group is 18.6%, compared to 14.2% in the non-asthmatic group. There is a statistically non-significant difference of 4.4% more cesarean sections in the asthmatic group compared to the control group. We have not demonstrated a statistically significant association between being born by cesarean section and an increased risk of asthma admission. Based on this finding, we cannot conclude that there is an association between being born by cesarean section and a higher risk of suffering from asthma, unlike what has been postulated in other research studies.

Deploying an asthma dashboard to support quality improvement across a nationally representative sentinel network of 7.6 million people in England

Every year, there are ~100,000 hospital admissions for asthma in the UK, many of which are potentially preventable. Evidence suggests that carefully conceptualised and implemented audit and feedback (A&F) cycles have the potential to improve clinical outcomes for those with chronic conditions. We wanted to investigate the technical feasibility of developing a near-real time asthma dashboard to support A&F interventions for asthma management in primary care. We extracted cross-sectional data on asthma from 756 participating GP practices in the Oxford-Royal College of General Practitioners Research and Surveillance Centre (RCGP RSC) database in England comprising 7.6 million registered people. Summary indicators for a GP practice were compared to all participating RCGP RSC practices using practice-level data, for the week 6–12th-Mar-2023. A weekly, automated asthma dashboard with features that can support electronic-A&F cycles that compared key asthma indicators for a GP practice to RCGP RSC could be created (https://tinyurl.com/3ydtrt85): 12-weeks-incidence 0.4% vs 0.4%, annual prevalence 6.1% vs 6.7%, inhaled relievers to preventer 1.2 vs 1.1, self-management plan given 83.4% vs 60.8%, annual reviews 36.8% vs 57.3%, prednisolone prescriptions 2.0% vs 3.2%, influenza vaccination 56.6% vs 55.5%, pneumococcal vaccination ever (aged ≥65 years) 90.2% vs 84.1% and current smokers 14.9% vs 14.8%. Across the RCGP RSC, the rate of hospitalisations was 0.024%; comparative data had to be suppressed for the study practice because of small numbers. We have successfully created an automated near real-time asthma dashboard that can be used to support A&F initiatives to improve asthma care and outcomes in primary care.

The UK Soft Drinks Industry Levy and childhood hospital admissions for asthma in England

Sugar sweetened beverage consumption has been suggested as a risk factor for childhood asthma symptoms. We examined whether the UK Soft Drinks Industry Levy (SDIL), announced in March 2016 and implemented in April 2018, was associated with changes in National Health Service hospital admission rates for asthma in children, 22 months post-implementation of SDIL. We conducted interrupted time series analyses (2012-2020) to measure changes in monthly incidence rates of hospital admissions. Sub-analysis was by age-group (5-9,10-14,15-18 years) and neighbourhood deprivation quintiles. Changes were relative to counterfactual scenarios where the SDIL wasn’t announced, or implemented. Overall, incidence rates reduced by 20.9% (95%CI: 29.6-12.2). Reductions were similar across age-groups and deprivation quintiles. These findings give support to the idea that implementation of a UK tax intended to reduce childhood obesity may have contributed to a significant unexpected and additional public health benefit in the form of reduced hospital admissions for childhood asthma.

Atmosphere particulate matter and respiratory diseases during COVID-19 in Korea

We aimed to examine the impact of COVID-19 non-pharmaceutical interventions (NPIs) on the relationship between air pollutants and hospital admissions for respiratory and non-respiratory diseases in six metropolitan cities in South Korea. This study compared the associations between particulate matter (PM10 and PM2.5) and hospital admission for respiratory and non-respiratory diseases before (2016–2019) and during (2020) the implementation of COVID-19 NPIs by using distributed lag non-linear models. In the Pre-COVID-19 period, the association between PM10 and admission risk for asthma and COPD showed an inverted U-shaped pattern. For PM2.5, S-shaped and inverted U-shaped changes were observed in asthma and COPD, respectively. Extremely high and low levels of PM10 and extremely low levels of PM2.5 significantly decreased the risk of admission for asthma and COPD. In the Post-COVID-19 outbreak period, the overall cumulative relationship between PM10 and PM2.5 and respiratory diseases and the effects of extreme levels of PM10 and PM2.5 on respiratory diseases were completely changed. For non-respiratory diseases, PM10 and PM2.5 were statistically insignificant for admission risk during both periods. Our study may provide evidence that implementing NPIs and reducing PM10 and PM2.5 exposure during the COVID-19 pandemic has contributed to reducing hospital admissions for environment-based respiratory diseases.

Patterns of asthma medication use and hospital discharges in New Zealand

In New Zealand a progressive increase in budesonide/formoterol dispensing, accompanied by a reduction in dispensing of short-acting β2-agonists (SABAs), inhaled corticosteroids (ICSs), and other ICS/long-acting β2-agonists (ICSs/LABAs), occurred in the 18-month period following publication of the 2020 New Zealand asthma guidelines, which recommended budesonide/formoterol anti-inflammatory reliever therapy. Our aim was to investigate more recent trends in asthma medication use and asthma hospital discharges in New Zealand. New Zealand national dispensing data for inhalers for the period from January 2010 to December 2022 were reviewed for patients aged 12 years and older. Monthly rates of dispensing of budesonide/formoterol, ICSs, other ICS/LABAs, and SABAs were displayed graphically by locally weighted scatterplot smoother plots. The rates of dispensing and hospital discharge for asthma were compared between the past 6 months for which dispensing data were available (July-December 2022) and the corresponding period from July to December 2019. There has been a progressive increase in dispensing of budesonide/formoterol since 2019, with a 108% increase between the period from July to December 2019 and the period from July to December 2022 in adolescents and adults. In contrast, there was a reduction in rates of dispensing of other ICS/LABAs, ICSs, and SABAs by 3%, 18%, and 5%, respectively. During this period, there was a 17% reduction in hospital discharges for asthma. There has been a further widespread uptake of ICS/formoterol reliever and/or maintenance therapy in adolescents and adults with asthma in New Zealand. The changes in prescribing practice have been temporally associated with a reduction in hospital admissions for asthma.

Short-Term Nitrogen Dioxide Exposure and Emergency Hospital Admissions for Asthma in Children: A Case-Crossover Analysis in England.

There is an increasing body of evidence associating short-term ambient nitrogen dioxide (NO2) exposure with asthma-related hospital admissions in children. However, most studies have relied on temporally resolved exposure information, potentially ignoring the spatial variability of NO2. We aimed to investigate how daily NO2 estimates from a highly resolved spatio-temporal model are associated with the risk of emergency hospital admission for asthma in children in England. We conducted a time-stratified case-crossover study including 111,766 emergency hospital admissions for asthma in children (aged 0-14 years) between 1st January 2011 and 31st December 2015 in England. Daily NO2 levels were predicted at the patients' place of residence using spatio-temporal models by combining land use data and chemical transport model estimates. Conditional logistic regression models were used to obtain the odds ratios (OR) and confidence intervals (CI) after adjusting for temperature, relative humidity, bank holidays, and influenza rates. The effect modifications by age, sex, season, area-level income deprivation, and region were explored in stratified analyses. For each 10 µg/m³ increase in NO2 exposure, we observed an 8% increase in asthma-related emergency admissions using a five-day moving NO2 average (mean lag 0-4) (OR 1.08, 95% CI 1.06-1.10). In the stratified analysis, we found larger effect sizes for male (OR 1.10, 95% CI 1.07-1.12) and during the cold season (OR 1.10, 95% CI 1.08-1.12). The effect estimates varied slightly by age group, area-level income deprivation, and region. Short-term exposure to NO2 was significantly associated with an increased risk of asthma emergency admissions among children in England. Future guidance and policies need to consider reflecting certain proven modifications, such as using season-specific countermeasures for air pollution control, to protect the at-risk population.

Impacts of ambient air quality on acute asthma hospital admissions during the COVID-19 pandemic in Oxford City, UK: a time-series study

ObjectivesThe study aims to investigate the short-term associations between exposure to ambient air pollution (nitrogen dioxide (NO2), particulate matter pollution—particles with diameter<2.5 µm (PM2.5) and PM10) and incidence of asthma...

Impact of air pollution on cardiorespiratory morbidities in Southern Thailand

Background/Objectives: Air pollution seriously threatens human health; even low-level exposure can have negative consequences. The study aimed to explore the influence of air pollution on cardiorespiratory diseases, adjusting for climatic conditions. MethodsPoisson regression using a generalized additive model (GAMs) and a distributed lag non-linear model (DLNM) were used to explore the relationships between air pollution and cardiorespiratory illnesses. ResultsAsthma, chronic obstructive pulmonary disease (COPD), cardiovascular disease (CVD), and lung cancer were reported at 88 per 10,000 population. Annual PM10 and PM2.5 levels were higher than WHO guidelines. PM10 and PM2.5 appeared to be on an upward trend, while NO2 and SO2 appeared to be on a downward trend. The 10 % increase in PM10 was significantly associated with an increase in inpatient department (IPD) admissions for asthma at a lag of 12–13 days and lung cancer at a lag of 14–15 days, whereas PM2.5 was associated with an increase in IPD admissions for asthma at a lag of 10–14 days and 13–15 days, respectively. A 10 % rise in PM10 was associated with an increase in COPD inpatient admissions at lag 2–6 days, while PM2.5 was associated with an increase in cardiovascular inpatient admissions at lag 4–5 days. A 10 % increase in NO2 increased admissions to COPD at all 15 lags, whereas a 10 % increase in CO increased admissions to lung cancer at lags 9–15 days. ConclusionsThe rise in PM2.5 and PM10 levels in this area leads to increased exposure to PM pollutants, hence elevating the likelihood of developing cardiorespiratory diseases.

Impact of Low PM2.5 Exposure on Asthma Admission: Age-Specific Differences and Evidence from a Low-Pollution Environment in China

Impact of Low PM2.5 Exposure on Asthma Admission: Age-Specific Differences and Evidence from a Low-Pollution Environment in China

Short-term effects of air pollutants on hospital admissions for asthma among older adults: a multi-city time series study in Southwest, China.

This study aimed to explore the relationship between air pollution and hospital admissions for asthma in older adults, and to further assess the health and economic burden of asthma admissions attributable to air pollution. We collected information on asthma cases in people over 65 years of age from nine cities in Sichuan province, as well as air pollution and meteorological data. The relationship between short-term air pollutant exposure and daily asthma hospitalizations was analyzed using the generalized additive model (GAM), and stratified by gender, age, and season. In addition, we assessed the economic burden of hospitalization for air pollution-related asthma in older adults using the cost of disease approach. The single pollutant model showed that every 1 mg/m3 increase in CO was linked with an increase in daily hospitalizations for older adults with asthma, with relative risk values of 1.327 (95% CI: 1.116-1.577) at lag7. Each 10 μg/m3 increase in NO2, O3, PM10, PM2.5 and SO2, on asthma hospitalization, with relative risk values of 1.044 (95% CI: 1.011-1.078), 1.018 (95% CI: 1.002-1.034), 1.013 (95% CI: 1.004-1.022), 1.015 (95% CI: 1.003-1.028) and 1.13 (95% CI: 1.041-1.227), respectively. Stratified analysis shows that stronger associations between air pollution and asthma HAs among older adult in females, those aged 65-69 years, and in the warm season, although all of the differences between subgroups did not reach statistical significance. During the study period, the number of asthma hospitalizations attributable to PM2.5, PM10, and NO2 pollution was 764, 581 and 95, respectively, which resulted in a total economic cost of 6.222 million CNY, 4.73 million CNY and 0.776 million CNY, respectively. This study suggests that short-term exposure to air pollutants is positively associated with an increase in numbers of asthma of people over 65 years of age in Sichuan province, and short-term exposure to excessive PM and NO2 brings health and economic burden to individuals and society.

The increasing burden of asthma acute care in Singapore: an update on 15-year population-level evidence

BackgroundIn Singapore, there is currently scarce population-based research informing the recent trends of asthma-related healthcare burdens. In this study, we investigated the past 25-year trends of asthma-related hospitalisations, emergency department (ED) visits and deaths in Singapore and projected the future burdens from 2023 to 2040.MethodsWe acquired annually-measured data from the Singapore Ministry of Health Clinical and National Disease Registry, containing 25-year asthma-related hospitalisation and death rates as well as 15-year ED visit rates. We conducted change-point analysis and generalised linear modelling to identify time intervals with stable trends and estimate asthma-related healthcare utilisation and mortality rates. To project future asthma-related burdens, we developed a probabilistic model which combined projections of future population size with the estimated rate outcomes from the last stable period.ResultsOur results show that the asthma hospitalisation rate in Singapore had remained at approximately 80 episodes per 100,000 from 2003 to 2019 and are likely to grow by 1.7% each year (95% CI: 0.7, 5.0%), leading to a total of 163,633 episodes from 2023 to 2040 which corresponds to an estimated $103,075,820 based on 2022 USD. Besides, Singapore’s asthma-related ED visit rate was 390 per 100,000 in 2019 and is expected to decline by 3.4% each year (95% CI: − 5.8, 0.0%), leading to a total of 208,145 episodes from 2023 to 2040 which corresponds to USD$15,053,795. In contrast, the 2019 asthma-related mortality rate in Singapore was approximately 0.57 per 100,000 and is likely to stay stably low (change per year: -1.3, 95% CI: − 11.0, 4.3%). Between 2023 and 2040, Singapore’s estimated total number of asthma-related deaths is 638 episodes.ConclusionsCurrently, the burden of asthma acute care in Singapore is high; Singapore’s asthma-related hospitalisation and ED visit rates are relatively higher than those of other developed economies, and its asthma admission rate is expected to increase significantly over time, possibly indicating excess resource use for asthma. The established national asthma programme in Singapore, together with recent efforts in reinforcing primary care at the national level, provides opportunities to reduce avoidable asthma admissions.

The influence of social and environmental determinants of health on hospitalizations for pediatric asthma

Background Asthma is the most common chronic disease of childhood, and has several social, environmental, and demographic factors potentially influential to its disease burden. This study sought to determine the influence of these factors on hospital admissions and readmissions for pediatric asthma. Methods This was a retrospective cohort study using data from the Indiana Network for Patient Care, a state-wide health information exchange in the United States. Study participants were children 2-18 years old admitted to the hospital with a respiratory diagnostic code between 2010 and 2021. Clinical variables were obtained from electronic health record data, and social and environmental determinants of health data were obtained from the Indiana Social Assets and Vulnerabilities Indicators using geocoding systems. Negative binomial models were used to examine community level social and environmental risk factors modifying the relationship between patient characteristics and the risk of asthma-related hospitalizations and 30-day readmissions. Results The study sample included 25,063 patients with an average follow-up of 9 (SD = 5) years. Of these, there were 17,816 asthma-related admissions. There were a total of 1,037 asthma-related 30-day readmissions, with an incidence rate of readmissions relative to total visits of 0.028 per person-year. A high social vulnerability index (SVI) was associated with an increased rate of hospital admissions (Proportion attributable ratio: 1.09, 95%CI (1.03,1.15), p < 0.05). No environmental determinants of health were significantly associated with hospitalization rate. Conclusion High SVI was significantly associated with increased risk of total hospital admissions for pediatric asthma.

Relationship between air quality and asthma-related emergency hospital admissions in Mexico City 2017–2019

BackgroundPrevious studies found exposure to air pollution leads to exacerbations of asthma in paediatric and adult patients and increases asthma-related emergency hospital admissions (AREHA).MethodsAREHAs and levels of air pollutants (PM10,...

Recurrence of wheeze in preschool aged children: a retrospective cohort study in primary care

Abstract Background Approximately 1 in 7 children with wheeze will be admitted to hospital for treatment, often leading to repeat visits to emergency departments and hospital admissions. The UK lags other wealthy countries in the management of preschool wheeze and has amongst the highest rates of asthma deaths in Europe. There were reports that wheeze and asthma admissions to hospitals fell during the Covid-19 pandemic lockdowns, but the changing community incidence is unknown. We aimed to report the changing incidence of recurrent wheeze across the Covid-19 pandemic. Methods Using data from the UK Clinical Practice Datalink, a nationally representative sample of the UK population, we followed a cohort of 57,603 children aged 1-5 years who consulted their general practitioner with their first wheeze attack between January 2009 and July 2020. We calculated the incidence of wheezing recurrence by calendar year. We will calculate the incidence rate ratios for recurrent wheeze by level of area-based deprivation whilst accounting for potential confounders including child age, sex, birth weight, gestation age, ethnicity, comorbidities, bronchiolitis, maternal smoking, maternal asthma, and maternal age at birth. Results The incidence of recurrent preschool wheeze remained stable across the Covid-19 pandemic (e.g., 2019: 27% vs 2020: 23%) even though total wheeze events in general practice fell from 3,135 in 2019 to 1,280 in 2020. Conclusions Around a quarter of children with wheeze have repeat visits to the GP. Our next steps are to identify preventive actions to reduce the risks of recurrent wheeze for children presenting with their first wheeze attack in primary care. Key messages • Around a quarter of children will have a repeat visit to the GP for wheeze within the first year after their initial wheeze attack. • The incidence of recurrent preschool wheeze remained stable across the Covid-19 pandemic.

Post-hospitalisation asthma management in primary care: a retrospective cohort study.

Clinical guidelines recommend that patients admitted to hospital for asthma attacks are reviewed in primary care following hospital discharge. To evaluate asthma management in primary care following a hospital admission for asthma and its associations with patient characteristics. A retrospective cohort study using English primary care data from the Clinical Practice Research Datalink Aurum database and linked Hospital Episode Statistics Admitted Patient Care data. Patients with asthma aged ≥5 years who had at least one asthma-related hospital admission from 1 January 2017 to 31 December 2019 were included. The primary outcome was a composite of any of the following delivered in primary care within 28 days from hospital discharge: asthma review, asthma management plan, asthma medication prescriptions, demonstration of inhaler technique, or smoking cessation counselling. The association between patient characteristics and delivery of clinical care was assessed using logistic regression. The study included 17 457 patients. A total of 10 515 (60.2%) patients received the primary outcome within 28 days of hospital discharge. There were 2311 (13.2%) who received an asthma review, 1459 (8.4%) an asthma management plan, 9996 (57.3%) an asthma medication, 1500 (8.6%) a demonstration of inhaler technique, and 52 (1.2% of smokers) had smoking cessation counselling. Patients from Black ethnic minority groups received less of this care (27%-54% lower odds, depending on age). However, short-acting bronchodilator prescriptions in the previous year were associated with an increased likelihood of the primary outcome. A significant proportion of patients do not receive timely follow-up in primary care following asthma-related admissions to hospital, particularly among Black ethnic minority groups.