Non‐linear short‐term effects of airborne pollen levels with allergenic capacity on asthma emergency room admissions in Madrid, Spain

Tobías, Aurelio; Galán, Iñaki; Banegas, José R.

doi:10.1111/j.1365-2222.2004.01983.x

Cited by 61 publications

(58 citation statements)

References 44 publications

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“…Air pollution data were not considered because it had a minimal influence on pollen effects in a previous study of this population [13],and others have not found any significant confounding in other populations either [6, 9]. Analyses were restricted to the months of the year when the pollen under study was present.…”

Section: Methodsmentioning

confidence: 99%

“…These data are usually based on volunteers and clinical populations and therefore cannot determine the prevalence of allergy or its relation to asthma in the community or general population. To compliment this clinical information, relatively few population-based studies have documented the impact of aeroallergens on emergency visits [6,7,8,9], hospitalizations [10, 11] and mortality [12]. …”

Section: Introductionmentioning

confidence: 99%

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Tree Pollen and Hospitalization for Asthma in Urban Canada

Dales¹,

Cakmak

Judek

et al. 2008

Int Arch Allergy Immunol

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Background: Allergy to tree pollen is common and aeroallergens have been associated with severe asthma exacerbations in the community setting. To determine the impact of different trees on asthma, we tested the association between daily hospitalizations for asthma and daily concentrations of different tree pollens in 10 large Canadian cities. Methods: Daily time-series analyses were employed to remove unwanted temporal trends. For each family or genus, results were adjusted for day of the week, temperature, barometric pressure and relative humidity. Results were expressed as the percentage increase in asthma hospitalizations related to an increase in tree pollen concentration equivalent in magnitude to its interquartile range. Results: For an interquartile increase in daily tree pollen concentration, percent increases in daily hospitalization for asthma were: 2.63% (95% CI 1.19–4.07) for Ulmus (elm), 2.45% (1.12–3.78) for the group containing Pinaceae (pine, fir, spruce), Tsuga (hemlock) and Larix (larch, tamarack); 2.32% (0.93–3.71) for the group containing Quercus (oak) and Castanea (chestnut), and 2.16% (0.70–3.62) for Acer (boxelder and maple). Statistically significant (p < 0.05) but small (<2%) effects were observed for Fraxinus (ash), Populus (aspen, poplar), Alnus (alder), Betula (birch) and Corylus (hazelnut). Conclusions: Several common tree pollens are an important cause of acute exacerbations of asthma severe enough to require hospitalization.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tree Pollen and Hospitalization for Asthma in Urban Canada

Dales¹,

Cakmak

Judek

et al. 2008

Int Arch Allergy Immunol

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“…Pollutants exacerbate asthma [9,18,19] and have been associated with increased emergency hospitalisations [20,21]. Aeroallergens also exacerbate asthma both independently [22] and in interaction with air pollution [8,23,24].…”

Section: Discussionmentioning

confidence: 99%

Pollution levels and the effect of air pollution on asthma hospitalisations modified by synoptic weather type and aeroallergens

Cakmak

Hebbern

2014

WIT Transactions on Ecology and the Environment

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Pollution levels and the effect of air pollution on human health can be modified by synoptic weather type and aeroallergens. We investigated the effect modification of aeroallergens on the association between CO, O 3 , NO 2 , SO 2 , PM 10 and PM 2.5 and asthma hospitalisation rates in seven synoptic weather types using single air pollutant models, adjusted for the effect of aeroallergens and stratified by synoptic weather type, with pooled relative risk estimates for asthma hospitalisation in ten Canadian cities. Aeroallergens significantly modified the relative risk in 19 pollutant-weather type combinations, reducing the size and variance for each single pollutant model. Aeroallergens did not significantly modify relative risk for any pollutant in the DT or MT weather types, or for PM 10 in any weather type. There is an interactive effect between aeroallergens and CO, O 3 , NO 2 , SO 2 , and PM 2.5 , on asthma hospitalisations that differs under specific synoptic weather types.

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“…A positive correlation between pollen or spore counts with allergic symptomology has been found in several clinical trials and in epidemiological studies documenting the impact of aeroallergens on symptom scores (Roberts et al 2005;Takasaki et al 2009), drug consumption (Fuhrman et al 2007 and references therein); consultations for allergic rhinitis (Pedersen and Rung Weeke 1984), emergency visits and hospitalizations (Lewis et al 2000;Lierl and Hornung 2003;Tobias et al 2004;references in Fuhrman et al 2007 andin Peden andReed 2010), and mortality (Targonski et al 1995).…”

Section: Policy Frameworkmentioning

confidence: 90%

“…The majority of studies have focused on the most severe episodes, although there may be an aggravation of symptoms without needing emergency care. The relationship between effects and aeroallergen levels could be nonlinear (Tobias et al 2004;Erbas et al 2007), whereas some authors have looked for linear effects only. The study period was not always limited to the period of pollen or spore dispersal.…”

Section: Chemical and Biological Weathermentioning

confidence: 99%

Interactions of Physical, Chemical, and Biological Weather Calling for an Integrated Approach to Assessment, Forecasting, and Communication of Air Quality

Klein

Kukkonen

Dahl

et al. 2012

AMBIO

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This article reviews interactions and health impacts of physical, chemical, and biological weather. Interactions and synergistic effects between the three types of weather call for integrated assessment, forecasting, and communication of air quality. Today's air quality legislation falls short of addressing air quality degradation by biological weather, despite increasing evidence for the feasibility of both mitigation and adaptation policy options. In comparison with the existing capabilities for physical and chemical weather, the monitoring of biological weather is lacking stable operational agreements and resources. Furthermore, integrated effects of physical, chemical, and biological weather suggest a critical review of air quality management practices. Additional research is required to improve the coupled modeling of physical, chemical, and biological weather as well as the assessment and communication of integrated air quality. Findings from several recent COST Actions underline the importance of an increased dialog between scientists from the fields of meteorology, air quality, aerobiology, health, and policy makers.

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Non‐linear short‐term effects of airborne pollen levels with allergenic capacity on asthma emergency room admissions in Madrid, Spain

Cited by 61 publications

References 44 publications

Tree Pollen and Hospitalization for Asthma in Urban Canada

Tree Pollen and Hospitalization for Asthma in Urban Canada

Pollution levels and the effect of air pollution on asthma hospitalisations modified by synoptic weather type and aeroallergens

Interactions of Physical, Chemical, and Biological Weather Calling for an Integrated Approach to Assessment, Forecasting, and Communication of Air Quality

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