Follow-up of the air pollution and the human male-to-female ratio analysis in São Paulo, Brazil: a times series study

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dc.contributor.authorEl Khouri Miraglia, Simone Georges [UNIFESP]
dc.contributor.authorVeras, Mariana Matera
dc.contributor.authorAmato-Lourenco, Luis Fernando
dc.contributor.authorRodrigues-Silva, Fernando
dc.contributor.authorNascimento Saldiva, Paulo Hilario
dc.contributor.institutionUniversidade Federal de São Paulo (UNIFESP)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2016-01-24T14:30:51Z
dc.date.available2016-01-24T14:30:51Z
dc.date.issued2013-01-01
dc.description.abstractObjectives in order to assess if ambient air pollution in urban areas could be related to alterations in male/female ratio this study objectives to evaluate changes in ambient particulate matter (PM10) concentrations after implementation of pollution control programmes in São Paulo city and the secondary sex ratio (SRR).Design and methods A time series study was conducted. São Paulo's districts were stratified according to the PM10 concentrations levels and were used as a marker of overall air pollution. the male ratio was chosen to represent the secondary sex ratio (SSR=total male birth/total births). the SSR data from each area was analysed according to the time variation and PM10 concentration areas using descriptive statistics. the strength association between annual average of PM10 concentration and SSR was performed through exponential regression, and it was adopted as a statistical significance level of p<0.05.Results the exponential regression showed a negative and significant association between PM10 and SSR. SSR varied from 51.4% to 50.7% in São Paulo in the analysed period (2000-2007). Considering the PM10 average concentration in São Paulo city of 44.72g/m(3) in the study period, the SSR decline reached almost 4.37%, equivalent to 30934 less male births.Conclusions Ambient levels of PM10 are negatively associated with changes in the SSR. Therefore, we can speculate that higher levels of particulate pollution could be related to increased rates of female births.en
dc.description.affiliationUniversidade Federal de São Paulo UNIFESP, ICAQF, Dept Ciencias Exatas & Terra, São Paulo, Brazil
dc.description.affiliationUniv São Paulo, Sch Med, Dept Pathol, Lab Expt Air Pollut LIM05, São Paulo, Brazil
dc.description.affiliationUnifespUniversidade Federal de São Paulo UNIFESP, ICAQF, Dept Ciencias Exatas & Terra, São Paulo, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIDCNPq: 573813/2008-5
dc.description.sponsorshipID: FAPESP - 2008/57717-6
dc.format.extent6
dc.identifierhttp://dx.doi.org/10.1136/bmjopen-2013-002552
dc.identifier.citationBmj Open. London: Bmj Publishing Group, v. 3, n. 7, 6 p., 2013.
dc.identifier.doi10.1136/bmjopen-2013-002552
dc.identifier.fileWOS000329805500031.pdf
dc.identifier.issn2044-6055
dc.identifier.urihttp://repositorio.unifesp.br/handle/11600/35674
dc.identifier.wosWOS:000329805500031
dc.language.isoeng
dc.publisherBmj Publishing Group
dc.relation.ispartofBmj Open
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectair pollutionen
dc.subjectsex ratioen
dc.subjectreproductive healthen
dc.subjectenvironmental healthen
dc.subjectSA o pound Pauloen
dc.titleFollow-up of the air pollution and the human male-to-female ratio analysis in São Paulo, Brazil: a times series studyen
dc.typeinfo:eu-repo/semantics/article
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