Short-term effects of pollen species on hospital admissions in the city of Madrid in terms of specific causes and age |
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Authors: | Julio Díaz Cristina Linares Aurelio Tobías |
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Institution: | (1) Asesor/a de la FUAM para el Dpto. de Educación para el Desarrollo Sostenible del, Ayuntamiento de Madrid, C/Bustamante, 16. 5a Planta, Madrid, 28045, Spain;(2) Instituto de Salud Carlos III, Escuela Nacional de Sanidad, Madrid, Spain |
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Abstract: | Background In recent years there has been a notable increase in respiratory diseases in industrialised countries, which is attributed
to a combination of chemical atmospheric pollution and the allergens existing in the atmosphere of big cities. Few studies,
however, have analysed the effect of different pollen species on the different causes of hospital admissions other than those
exclusively owing to asthma. Objective The aim of this investigation was to analyse the influence of the most abundant pollen species with the highest allergenic
potential in Madrid’s atmosphere on daily emergency hospital admissions – from all causes and specific causes – according
to different age groups. Methods An ecological time-series design was adopted in which the effects were quantified using Poisson regression models, taking
into account different confusion factors, such as chemical and acoustic atmospheric pollution. Results Statistically significant associations were found between pollen species and hospital admissions due to respiratory causes,
and between pollen species and all causes of hospital admissions and, to a lesser degree, circulatory causes. The impact was
greater in the younger age groups. Concentrations of Poaceae and Platanus pollen species were the factors showing the highest correlation to the different causes of admission. Conclusion The relative risks analysis revealed a significant effect between the pollen species analysed and health for admitted patients
of all age groups; this effect was greater than that detected for the environmental variables traditionally analysed in urban
atmospheres. |
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Keywords: | Cupressaceae Hospital admissions Olea Platanus Poaceae Pollen Time-series |
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