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Monthly-Term Associations Between Air Pollutants and Respiratory Morbidity in South Brazil 2013–2016: A Multi-City, Time-Series Analysis

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Department of Civil and Environmental Engineering, Universidad del Norte, 081007 Barranquilla, Colombia
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Postgraduate Program in Remote Sensing. Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, RS 91501-970 Porto Alegre, Brazil
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Environmental Engineering program, Universidade Federal do Rio Grande do Sul, RS 91501-970 Porto Alegre, Brazil
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Departamento de Salud Pública, Universidad del Norte, 081007 Barranquilla, Colombia
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Departamento de Salud Pública, Universidad Industrial de Santander, 680002 Bucaramanga, Colombia
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2019, 16(20), 3787; https://doi.org/10.3390/ijerph16203787
Received: 25 July 2019 / Revised: 18 September 2019 / Accepted: 24 September 2019 / Published: 9 October 2019
(This article belongs to the Section Environmental Science and Engineering)
Most air pollution research conducted in Brazil has focused on assessing the daily-term effects of pollutants, but little is known about the health effects of air pollutants at an intermediate time term. The objective of this study was to determine the monthly-term association between air pollution and respiratory morbidity in five cities in South Brazil. An ecological time-series study was performed using the municipality as the unit of observation in five cities in South Brazil (Gravataí, Triunfo, Esteio, Canoas, and Charqueadas) between 2013 and 2016. Data for hospital admissions was obtained from the records of the Hospital Information Service. Air pollution data, including PM10, SO2, CO, NO2, and O3 (µg/m3) were obtained from the environmental government agency in Rio Grande do Sul State. Panel multivariable Poisson regression models were adjusted for monthly counts of respiratory hospitalizations. An increase of 10 μg/m3 in the monthly average concentration of PM10 was associated with an increase of respiratory hospitalizations in all age groups, with the maximum effect on the population aged between 16 and 59 years (IRR: Incidence rate ratio 2.04 (95% CI: Confidence interval = 1.97–2.12)). For NO2 and SO2, stronger intermediate-term effects were found in children aged between 6 and 15 years, while for O3 higher effects were found in children under 1 year. This is the first multi-city study conducted in South Brazil to account for intermediate-term effects of air pollutants on respiratory health. View Full-Text
Keywords: air pollution; morbidity; adverse effects; epidemiology; Brazil air pollution; morbidity; adverse effects; epidemiology; Brazil
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Agudelo-Castañeda, D.M.; Calesso Teixeira, E.; Alves, L.; Fernández-Niño, J.A.; Rodríguez-Villamizar, L.A. Monthly-Term Associations Between Air Pollutants and Respiratory Morbidity in South Brazil 2013–2016: A Multi-City, Time-Series Analysis. Int. J. Environ. Res. Public Health 2019, 16, 3787.

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