Ozone exposure and its influence on the worsening of childhood asthma

Sousa, Sofia; Alvim-Ferraz, M.C.M.; Martins, F.G.; Pereira, Maria do Carmo

doi:10.1111/j.1398-9995.2009.01946.x

Cited by 25 publications

(8 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The lowest average daily surface ozone concentrations also occurred in 2007 (average concentration =92.10 μg/m 3 , varying between 39.38 μg/m 3 and 150.46 μg/m 3 ). In fact, as detected by other authors [32], surface ozone levels during the 2007 summer were among the lowest in the past decade in Portugal, and, accordingly, the number of exceedances in Europe was also lower in that summer than in any of the last 10 summers. The levels of the other pollutants tend to be low.…”

Section: Resultssupporting

confidence: 62%

The Lag Structure and the General Effect of Ozone Exposure on Pediatric Respiratory Morbidity

Fraga

Botelho

Sá

et al. 2011

IJERPH

View full text Add to dashboard Cite

Up to now no study has investigated the lag structure of children’s respiratory morbidity due to surface ozone. In the present study, we investigate the lag structure and the general effect of surface ozone exposure on children and adolescents’ respiratory morbidity using data from a particularly well suited area in southern Europe to assess the health effects of surface ozone. The effects of surface ozone are estimated using the recently developed distributed lag non-linear models, allowing for a relatively long timescale, while controlling for weather effects, a range of other air pollutants, and long and short term patterns. The public health significance of the estimated effects is higher than has been previously reported in the literature, providing evidence contrary to the conjecture that the surface ozone-morbidity association is mainly due to short-term harvesting. In fact, our data analysis reveals that the effects of surface ozone at medium and long timescales (harvesting-resistant) are substantially larger than the effects at shorter timescales (harvesting-prone), a finding that is consistent with all children and adolescents being affected by high surface ozone concentrations, and not just the very frail.

show abstract

Section: Resultssupporting

confidence: 62%

The Lag Structure and the General Effect of Ozone Exposure on Pediatric Respiratory Morbidity

Fraga

Botelho

Sá

et al. 2011

IJERPH

View full text Add to dashboard Cite

show abstract

“…Daily variations in NO2 concentrations boiled down to two significant peaks -one in the morning and another at the end of the afternoon, matching the two traffic rush periods, as expected for urban areas (Wichmann et al, 2010). From the O3 outdoor profiles, it is possible to observe the highest concentrations along the afternoon, as expected (Sousa et al, 2009). These profiles were generally similar to those typically found indoors, thus outdoor air seemed to be the main contributor to those concentrations found indoors.…”

Section: Co No2 and O3supporting

confidence: 70%

Children's exposure to indoor air in urban nurseries – Part II: Gaseous pollutants' assessment

Branco

Nunes

Alvim-Ferraz

et al. 2015

Environmental Research

View full text Add to dashboard Cite

show abstract

“…Monteiro et al (2005) developed and validated a numerical air quality operational forecasting system over Portugal during the summer 2003 and noted that still improvements are needed on the chemistry-transport model. Sousa et al (2009b;2011) observed that occurrence of childhood asthmatic symptoms were significantly higher at sites with high surface O 3 values than at sites with low surface O 3 values.…”

Section: Introductionmentioning

confidence: 99%

Surface Ozone Variability and Trend over Urban and Suburban Sites in Portugal

Kulkarni

Bortoli

Domingue

et al. 2016

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

The surface ozone time series is analyzed for the seasonal and inter-annual variations and the trend in the following three categories ( (1) original surface ozone time series and of (2) deseasonalized surface ozone time series for all the three data set categories and for all the 8 sites was performed and found to be statistically significant at 6 sites for monthly mean and 8 hr monthly mean and at 5 sites for daily maximum monthly meanusing the non-parametric Mann-Kendall test. The analysis of original surface ozone time series showed a positive trend at 6 out of 8 sites, but the results were not statistically significant for most of the sites due to the presence of the annual cycle masking the actual trend values. However, the analysis of deseasonalized surface ozone time series showed a statistically significant increasing trend at 7 out of 8 sites with high Z values. The positive trends found in the deseasonalized surface ozone time series were in the range 0.44 up to 1.42 µg m -3 year -1 for the monthly mean surface ozone time series (7 stations), 0.33 up to 1.43 µg m -3 year -1 in the case of the 8 hr monthly mean surface ozone time series (7 stations) and 0.66 up to 1.55 µg m -3 year -1 in the daily maximum monthly mean surface ozone time series (6 stations).

show abstract

Ozone exposure and its influence on the worsening of childhood asthma

Abstract: The prevalence of childhood asthmatic symptoms was about 4% higher at the high O(3) site than at the low O(3) site.

Cited by 25 publications

References 30 publications

The Lag Structure and the General Effect of Ozone Exposure on Pediatric Respiratory Morbidity

The Lag Structure and the General Effect of Ozone Exposure on Pediatric Respiratory Morbidity

Children's exposure to indoor air in urban nurseries – Part II: Gaseous pollutants' assessment

Surface Ozone Variability and Trend over Urban and Suburban Sites in Portugal

Contact Info

Product

Resources

About