Time-series studies on air pollution and daily outpatient visits for allergic rhinitis in Beijing, China

Zhang, Fengying; Wang, Wuyi; Lv, Jinmei; Krafft, Thomas; Xu, Jin

doi:10.1016/j.scitotenv.2011.04.007

Cited by 76 publications

(52 citation statements)

References 43 publications

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“…In order to quantify the association between daily levels of ozone and daily mortality, adjusted by confounders in the multivariable modeling, consistent with other time-series studies [21,22,24], we used the generalized additive model (GAM) with penalized splines to analyze the risk of cardio-respiratory mortality attributable to ozone pollution. Because the daily mortality was small and typically followed a Poisson distribution, the core analysis was a GAM with log link and Poisson error that accounted for smooth fluctuations in the daily mortality.…”

Section: Discussionmentioning

confidence: 99%

Spatiotemporal Patterns of Ozone and Cardiovascular and Respiratory Disease Mortalities Due to Ozone in Shenzhen

et al. 2017

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Abstract:In order to explore the temporal-spatial patterns and possible health effects of ozone in Shenzhen, daily concentrations of ozone and the daily mortality caused by cardiovascular and respiratory diseases were collected. Using Geographic Information System (GIS) and SPSS, the spatial and temporal patterns of ozone in Shenzhen were illustrated. Using a generalized additive model (GAM), the associations between ozone and cardiovascular and respiratory diseases causing mortality were analyzed, adjusted for meteorological factors and other major air pollutants including fine particulate matter (PM 2.5 ), nitrogen dioxide (NO 2 ) and carbon monoxide (CO), and stratified by lag, age, and gender. The results showed that, during 2013, ozone was the second main air pollutant in Shenzhen apart from PM 2.5 , with average daily concentrations of 95.9 µg/m 3 and 76.8 µg/m 3 for the ozone 1-h mean and the daily ozone 8-h maximum concentration, respectively. The daily level of ozone had a higher concentration from September to October, and relatively low concentration from May to June. Obviously, a higher concentration was found in central parts of Shenzhen with the largest population, indicating higher risks. The excess risk (ER) percentage of the cardio-respiratory mortality rate showed a clearly accumulative effect at L03, with the highest ER percentage of 1.08 (0.88-1.27) per 10 µg/m 3 increase in the ozone 8-h maximum concentration for all the population. Males were found to be more sensitive to ozone compared with females, and the elderly were more susceptible to ozone exposure than younger people.

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Section: Discussionmentioning

confidence: 99%

Spatiotemporal Patterns of Ozone and Cardiovascular and Respiratory Disease Mortalities Due to Ozone in Shenzhen

et al. 2017

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“…In contrast, [49] found that elevated PM 10 levels indicate a dominant role among the main air pollutants. [30,61] found that the association between particulate matter and health conditions was not significant, while others [38,60,64,[66][67][68][69][70][71] found that the number of admissions for respiratory causes rose significantly with increased exposure to particulate matter. It should be added that the health impact of particulates is complex as their biological effect can be influenced by the particle size and composition [30].…”

Section: Season Ofmentioning

confidence: 99%

Risk Factors for Asthma Hospitalization among Adults and Elderly

Makra¹

2015

Arch Otolaryngol Rhinold

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Joint effect of biological (pollen) and chemical air pollutants on asthma emergency room (ER) visits was analyzed for Szeged region of Southern Hungary. Our database of a nine-year period (1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007) includes daily number of asthma emergency room (ER) visits, and daily mean concentrations of CO, PM 10 , NO, NO 2 , O 3 and SO 2 , furthermore two pollen variables (Ambrosia and total pollen excluding Ambrosia), as well. The analysis was performed for ER visits of asthma bronchiale using two age groups (adults and the elderly) of males and females for three seasons. Factor analysis was performed in order to clarify the relative importance of the pollutant variables affecting asthma ER visits. Asthma ER visits denote notably stronger associations with the pollutants in adult male than in adult female patients both for the pollen season of Ambrosia and the pollen-free season. Furthermore, adults are substantially more sensitive to severe asthma attack than the elderly for the season of total pollen excluding Ambrosia pollen. The joint effect of the chemical and pollen variables is the highest for the asthma ER cases in the pollen season of Ambrosia, basically due to the extra impact of the total pollen excluding Ambrosia pollen and partly due to Ambrosia pollen. A nonparametric regression technique was applied to discriminate between events of ER visit -no ER visit using pollen and chemical pollutants as explaining variables. Based on multiple correlations, the strongest relationships between ER visits and pollutants are observed during the pollen-free season. The elderly group with asthma bronchiale is characterized by weaker relationships between ER visits and pollutants compared to adults. Ratio of the number of correct decisions on the events of ER visit -no ER visit is lowest for the season of total pollen excluding Ambrosia pollen. Otherwise, similar conclusions hold as those received by multiple correlations. on aeroallergens. These include impacts on pollen amount, pollen allergen city, pollen season, plant and pollen distribution, and other plant attributes [18][19][20][21][22]. Hence, due to the continually increasing air pollution, respiratory diseases are of major concern worldwide. Air pollution of Hungary is one of the highest in Europe. Around 16,000 annual premature deaths attributable to exposure to ambient PM 10 concentrations are estimated in the country [23,24]. Furthermore, airborne pollen levels are also high. The Carpathian basin, involving Hungary (Figure 1) is considered the most polluted region with airborne ragweed (Ambrosia) pollen in Europe. Ambrosia in Hungary discharges the most pollen of all taxa; the ratio of its pollen release compared to the total pollen release in the late summer period is around 60-71% [25]. Highest counts on peak days in Szeged, Southern Hungary, are about one order of magnitude higher than those in other cities of Europe [26]. The sensitivity of patients to ragweed in Szeged is 83.7% [27]. About 30% of the Hungar...

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“…A significant portion of the construction materials has been used in urban development and transportation. China's urbanization improved citizen's life but at the same time caused congestion and increased effect of urban heat island [44], increased air pollution that threatens citizen's health [45,46], increased heavy metal concentration in soils and degraded soil quality [47]. Therefore, how to urbanize in China has become the focus of the society [48].…”

Section: Progress In Remote Sensing Of Environmental Change Over Chinamentioning

confidence: 99%

Remote sensing of environmental change over China: A review

Gong

2012

Chin. Sci. Bull.

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Time-series studies on air pollution and daily outpatient visits for allergic rhinitis in Beijing, China

Cited by 76 publications

References 43 publications

Spatiotemporal Patterns of Ozone and Cardiovascular and Respiratory Disease Mortalities Due to Ozone in Shenzhen

Spatiotemporal Patterns of Ozone and Cardiovascular and Respiratory Disease Mortalities Due to Ozone in Shenzhen

Risk Factors for Asthma Hospitalization among Adults and Elderly

Remote sensing of environmental change over China: A review

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