relation: http://publicatio.bibl.u-szeged.hu/29997/
title: Multivariate analysis of respiratory problems and their connection with meteorological parameters and the main biological and chemical air pollutants
creator:  Matyasovszky István
creator:  Makra László
creator:  Bálint Beatrix
creator:  Guba Z
creator:  Sümeghy Zoltán
subject: 01.05. Föld- és kapcsolódó környezettudományok
description: The aim of the study is to analyse the joint effect of  biological (pollen) and chemical air pollutants, as well as  meteorological variables, on the hospital admissions of  respiratory problems for the Szeged region in Southern Hungary.  The data set used covers a nine-year period (1999-2007) and is  unique in the sense that it includes-besides the daily number of  respiratory hospital admissions-not just the hourly mean  concentrations of CO, PM 10, NO, NO 2, O 3 and SO 2 with  meteorological variables (temperature, global solar flux,  relative humidity, air pressure and wind speed), but two pollen  variables (Ambrosia and total pollen excluding Ambrosia) as  well. The analysis was performed using three age categories for  the pollen season of Ambrosia and the pollen-free season.  Meteorological elements and air pollutants are clustered in  order to define optimum environmental conditions of high patient  numbers. ANOVA was then used to determine whether cluster- related mean patient numbers differ significantly. Furthermore,  two novel procedures are applied here: factor analysis including  a special transformation and a time-varying multivariate linear  regression that makes it possible to determine the rank of  importance of the influencing variables in respiratory hospital  admissions, and also compute the relative importance of the  parameters affecting respiratory disorders. Both techniques  revealed that Ambrosia pollen is an important variable that  influences hospital admissions (an increase of 10 pollen grains  m -3 can imply an increase of around 24% in patient numbers).  The role of chemical and meteorological parameters is also  significant, but their weights vary according to the seasons and  the methods. Clearer results are obtained for the pollination  season of Ambrosia. Here, a 10 μg m -3 increase in O 3 implies a  patient number response from -17% to +11%. Wind speed is a  surprisingly important variable, where a 1 m s -1 rise may  result in a hospital admission reduction of up to 42-45%.
date: 2011
type: Folyóiratcikk
type: PeerReviewed
format: text
identifier: http://publicatio.bibl.u-szeged.hu/29997/1/1-s2.0-S1352231011005073-main.pdf
identifier:     Matyasovszky István;  Makra László;  Bálint Beatrix;  Guba Z;  Sümeghy Zoltán: Multivariate analysis of respiratory problems and their connection with meteorological parameters and the main biological and chemical air pollutants.   ATMOSPHERIC ENVIRONMENT, 45 (25).  pp. 4152-4159.  ISSN 1352-2310 (2011)     
identifier: doi:10.1016/j.atmosenv.2011.05.024
relation: https://doi.org/10.1016/j.atmosenv.2011.05.024
relation: 1659069
language: eng
relation: info:eu-repo/semantics/altIdentifier/doi/10.1016/j.atmosenv.2011.05.024
rights: info:eu-repo/semantics/restrictedAccess