Extreme temperatures and emergency department admissions for childhood asthma in Brisbane, Australia

Xu, Zhiwei; Huang, Cunrui; Hu, Wenbiao; Turner, Lyle; Su, Hong; Tong, Shilu

doi:10.1136/oemed-2013-101538

Cited by 100 publications

(99 citation statements)

References 38 publications

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“…Minimum ambient temperatures were demonstrated to be associated with wheezing and similar respiratory illnesses in our study and several countries in the recent past [1,3,8,[27][28][29]. According to the World Allergy Organization, cold air exacerbating asthma is consistent, unlike the correlation patterns between asthma and other meteorological parameters reported around the world [1].…”

Section: The Implications/utility Of the Findings Of This Studycontrasting

confidence: 44%

“…Low-ambient temperatures were demonstrated to result in similar respiratory illnesses in several countries in the recent past [1,3,8,[27][28][29]. A drop of temperature even by 1°C was demonstrated to have led to acute exacerbations of COPD and that effect was pronounced with a larger (5°C) drop [8,29]. Nevertheless, there is no universal cut-off point below which we can define air as 'cold' or 'warm'.…”

Section: Discussion Of the Biological Basis Of Correlation Patterns Wmentioning

confidence: 99%

“…In one study, ambient temperature was negatively related to both morning and evening peak expiratory flow (PEF) and forced expiratory volume in the first second (FEV1) with 0-3 days lag [18]. Exposure to extreme heat was associated with increased risk of hospitalization for asthma in the USA, Australia and Europe [25,29,31]. However, their lag periods were shorter.…”

Section: Discussion Of the Biological Basis Of Correlation Patterns Wmentioning

confidence: 99%

See 2 more Smart Citations

The association between local meteorological changes and exacerbation of acute wheezing in Kandy, Sri Lanka

Ehelepola

Ariyaratne

Jayaratne

2018

Global Health Action

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Background: Severe wheezing is a common medical emergency. Past studies have demonstrated associations between exacerbation of wheezing and meteorological factors and atmospheric pollution. There are no past studies from Sri Lanka that analyzed correlation between daily multiple meteorological variables and exacerbation of wheezing. Objectives: To determine the correlations between daily counts of patients nebulized at the Outpatient Department (OPD) of Teaching Hospital -Kandy (THK) and local meteorological variables, and to explore the utility of that information. Design: We considered daily counts of patients nebulized at the OPD of THK as an indicator of exacerbations of wheezing in the population catered to by this hospital. We determined the correlations between daily counts of patients nebulized at OPD and the following meteorological variables for four years: daily rainfall, minimum temperature, maximum temperature, diurnal temperature range, difference between maximum temperature and the temperature at 1800 hours, daytime humidity, nighttime humidity, barometric pressure and visibility. We utilized wavelet time series method for data analysis. Results: All nine meteorological parameters studied were correlated with the daily counts of patients nebulized with average lag periods ranging from 5 to 15 days. Peaks of daily rainfall, maximum temperature, diurnal temperature range, difference between maximum temperature and the temperature at 1800 hours and daytime humidity were followed by peaks of counts of patients nebulized (positive correlations). Troughs of minimum temperature, nighttime humidity, barometric pressure and visibility were followed by peaks of patients nebulized (negative correlations). Conclusions: The THK shall expect more patients with acute wheezing after extremes of weather. Minimum temperature has been consistently correlated with the exacerbation of respiratory symptoms in the past studies in other countries as well. Hence, prescribing the inhalation of more drugs on unusually cold days (prophylactically) may help prevent acute exacerbation of wheezing in patients on treatment for asthma and COPD.

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Section: The Implications/utility Of the Findings Of This Studycontrasting

confidence: 44%

Section: Discussion Of the Biological Basis Of Correlation Patterns Wmentioning

confidence: 99%

Section: Discussion Of the Biological Basis Of Correlation Patterns Wmentioning

confidence: 99%

See 1 more Smart Citation

The association between local meteorological changes and exacerbation of acute wheezing in Kandy, Sri Lanka

Ehelepola

Ariyaratne

Jayaratne

2018

Global Health Action

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“…In this study, we define heatwave as a sustained period of !2 consecutive days when the temperature ! the 99th percentile of daily mean temperatures (Huang et al, 2012a;Xu et al, 2013;Bobb et al, 2014). The delayed effects of 7 days were also examined using DLNM model.…”

Section: Discussionmentioning

confidence: 99%

The effects of high temperature on cardiovascular admissions in the most populous tropical city in Vietnam

Phung

Lee

Thai

et al. 2016

Environmental Pollution

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“…It is evident that there is a delay between daily temperature changes and changes in the incidence of asthma, although the latency periods varied in different studies. Higher temperatures were related to short-term effects on mortality and morbidity 17 , while the effects of low temperature were delayed and lasted for several days 18 . However, we were unable to identify significance in the association between warm periods and asthma hospitalizations in this study.…”

Section: Discussionmentioning

confidence: 99%

Association between climate variables, pollutants, aerosols and hospitalizations due to asthma

Souza¹,

Santos²,

Ikefuti³

2017

Mundo da Saúde

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Many studies have shown that climatic and pollutant variables are directly related to the increase of hospitalizations due to respiratory diseases, mainly asthma. The aim of this study was to estimate the association between exposure to climate variables, pollutants, aerosols and hospitalizations due to asthma. This ecological study used time series with daily asthma hospitalization indicators, and concentrations of pollutants, climate data and aerosols, between January 2013 and December 2013. A generalized additive model using Poisson regression was used to estimate the relative risk with a two-day lag after exposure; the unipollutant model was adjusted by the apparent temperature, a measure defined from the temperature and relative humidity of the air, and a variable was added to control the seasonality and the day of the week. As a result, the values of relative risks (RR) for hospitalizations due to asthma were: for minimum temperature RR= 0.8985; maximum humidity RR= 0.9819; wind speed RR= 0.9419; rain RR= 0.9834; ozone RR= 0.9735; aerosols (AOT) RR= 1.0078; clearness index (Kt) RR= 0.0492 and carbon monoxide RR= 1.0865 for a two-day lag. After considering the aforementioned factors, we found the values of B coefficients. Exposure to climatic variables, pollutants, aerosols and clearness index was associated with hospitalizations due to asthma, and provided subsidies for the implementation of preventive measures to decrease these outcomes.Keywords: Hospitalization. Asthma. Environmental pollutants. Atmosphere. ResumoMuitos estudos vêm demonstrando que variáveis climáticas e poluentes tem uma relação direta no aumento de internações por doenças respiratórias, principalmente por asma. O objetivo deste estudo foi estimar a associação entre exposição às variáveis climáticas, poluentes, aerossóis nas internações por asma. O presente estudo ecológico utilizou séries temporais com indicadores diários de internação por asma, e concentrações de poluentes, dados de clima e aerossóis, entre janeiro de 2013 e dezembro de 2013. Um modelo aditivo generalizado utilizando regressão de Poisson foi usado para estimar o risco relativo, com defasagem de dois dias após a exposição; o modelo unipoluente foi ajustado pela temperatura aparente, medida definida a partir da temperatura e umidade relativa do ar, foi adicionada uma variável para controlar a sazonalidade e o dia da semana. Como resultados, os valores dos riscos relativos para internações por asma foram para Temperatura mínima: RR=0,8985; umidade máxima RR=0,9819; velocidade dos ventos RR=0,9419; precipitação RR= 0,9834; ozônio RR=0,9735; aerossóis (AOT; RR=1,0078; índice de claridade (Kt) RR=0,0492 e monóxido de carbono RR=1,0865 para defasagem temporal de dois dias. Após considerar os fatores mencionados, encontramos os valores dos coeficientes B's. A exposição às variáveis climáticas, poluentes, aerossóis e índice de claridade esteve associada às internações por asma, e forneceu subsídios para implantação de medidas preventivas para diminuírem esses desfechos.

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Extreme temperatures and emergency department admissions for childhood asthma in Brisbane, Australia

Abstract: Both hot and cold temperatures seemed to affect EDAs for childhood asthma. As climate change continues, children aged 0-4 years are at particular risk for asthma.

Cited by 100 publications

References 38 publications

The association between local meteorological changes and exacerbation of acute wheezing in Kandy, Sri Lanka

The association between local meteorological changes and exacerbation of acute wheezing in Kandy, Sri Lanka

The effects of high temperature on cardiovascular admissions in the most populous tropical city in Vietnam

Association between climate variables, pollutants, aerosols and hospitalizations due to asthma

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