Abstract
Few studies have focused on the long-term influence of the climate on the prevalence of asthma. The aim of this study is to establish the influence of geo-climatic conditions on the prevalence of asthma symptoms both in adolescents and schoolchildren, and to discover if this influence is associated with their time trends. Eight centres in Spain performed both ISAAC phases I (1994) and III (2002) in children 13–14 years old. Six of them also surveyed children 6–7 years old. For each age group and phase, about 3,000 children were surveyed per centre. This study examines the prevalence of current wheeze and severe current wheeze in two different geo-climatic zones, coast and plateau, considering their relative humidity and temperature range. In both age groups, the mean asthma prevalence on the coast, for phase I and III, was significantly higher than on the plateau. Living on the plateau was an independent protective factor for current wheeze and severe current wheeze for the two age groups. Within the coastal centres, the increase of the annual relative humidity was a statistical significant risk factor for current wheeze, the same trend existing for current severe wheeze. These effects were independent of the sex and of the phase of the study. The prevalence of asthma and severe asthma symptoms is more frequent on the coast of Spain as compared to the inner plateau. This finding was repeated both in 1994 and in 2002.
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We thank Mr. Anthony Carlson for his corrections of the English language. Funding was provided by: Instituto de Salud Carlos III, Red de Centros RCESP (C03/09); Oscar Rava Foundation fund 2001, Barcelona; Health Department, Navarra Autonomic Government; Rotaria Luis Vives Fund 2002–2003, Valencia; Health Department, Murcia Autonomic Government; Environmental Unit, Cartagena Town Hall; and AstraZeneca Spain.
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García-Marcos, L., Batllés-Garrido, J., Blanco-Quirós, A. et al. Influence of two different geo-climatic zones on the prevalence and time trends of asthma symptoms among Spanish adolescents and schoolchildren. Int J Biometeorol 53, 53–60 (2009). https://doi.org/10.1007/s00484-008-0190-3
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DOI: https://doi.org/10.1007/s00484-008-0190-3