Interaction Effects of Air Pollution and Climatic Factors on Circulatory and Respiratory Mortality in Xi’an, China between 2014 and 2016

Mokoena, Kingsley Katleho; Ethan, Crystal Jane; Yu, Yan; Quachie, Asenso Theophilus

doi:10.3390/ijerph17239027

Cited by 18 publications

(12 citation statements)

References 52 publications

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“…For many years, the level of air pollution has been associated with several adverse health effects and is among the leading causes of death globally (Mokoena et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Air Quality Status in Wuhan City during and One Year after the COVID-19 Lockdown

Ethan

Mokoena

2022

Aerosol Air Qual. Res.

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Anthropogenic activities have been established to have severe adverse effects on air quality. Consequently, the nature of daily events, directly and indirectly, influences the nature of air pollution observed. This study focused on describing air quality one year after the Coronavirus (COVID-19) pandemic lockdown (since anthropogenic activities had resumed back to normal) in Wuhan.Using the independent t-test, the means of air quality index (AQI) and individual air pollutants concentration during the lockdown were compared with the means after the lockdown. Cohen's d was estimated to quantify the standardized mean difference observed.Based on the average AQI, the air quality in Wuhan during and after the lockdown was rated "good"; and ranged between 59.7 and 99.8. Indicators of traffic pollution, particularly NO2, were significantly higher after the lockdown; noting a 162% increment in concentration. A 36% increase was also noted for ozone immediately after the lockdown; while a 33% increase was noted for SO2 roughly eight months post lockdown. At different periods post lockdown, particulate matter pollution varied, with some time-spans observing lower concentrations and others higher concentrations than the lockdown. A trade-off effect between PM2.5 and O3 was also noted during and after the lockdown.One year post the lockdown, air quality in Wuhan has observed some drastic changes. Hence, there is a need for more studies to identify other specific and peculiar sources of emissions in the city. Relevant findings should be employed in supporting the implementation of stringent emission control.

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“…For many years, the level of air pollution has been associated with several adverse health effects and is among the leading causes of death globally (Mokoena et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Air Quality Status in Wuhan City during and One Year after the COVID-19 Lockdown

Ethan

Mokoena

2022

Aerosol Air Qual. Res.

Self Cite

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“…Even though a mounting body of evidence has suggested the independent impacts of meteorological factors or PM on childhood asthma, limited studies have explored their possible interactive effects to date [22,39,40]. [22]. The results of this study indicate antagonistic interaction between temperature and PM and synergistic interaction between air pressure and PM on the outpatient visits for childhood asthma.…”

Section: Discussionmentioning

confidence: 66%

Section: Discussionmentioning

confidence: 99%

Interactive Effects of Meteorological Factors and Particulate Pollutants on Childhood Asthma: A Time Series Analysis in Shanghai, China

et al. 2021

Preprint

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Background: Previous studies have revealed that meteorological factors or ambient air pollutants were associated with childhood asthma, but their interactive effects are scarcely known. Methods: In order to investigate the potential interactions between meteorological factors and air pollutants on childhood asthma, we obtained daily data on meteorological factors (mean temperature, mean relative humidity, and mean air pressure), air particulate matter (PM) with diameter < 2.5 µm (PM2.5) and < 10 µm (PM10), and outpatient visits for childhood asthma during 2007-2017 in Shanghai, China. Independent effects of meteorological factors and PM on childhood asthma were estimated using distributed lag non-linear model (DLNM), and then relative excess risk due to interaction (RERI) was calculated to assess their potential interactions. Results: A total of 976, 350 outpatient visits for childhood asthma were included in this study. Significant lagged and non-linear effects of meteorological factors and PM exposure on childhood asthma were observed in DLNM analyses. Further, in interaction analysis, we found statistically significant antagonistic interaction between mean temperature and PM (RERI: -0.14, 95%CI: -0.15, -0.12 for PM2.5; RERI: -0.09, 95%CI: -0.10, -0.08 for PM10) and synergistic interaction between mean air pressure and PM (RERI: 0.16, 95%CI: 0.14, 0.18 for PM2.5; RERI: 0.17, 95%CI: 0.15, 0.19 for PM10) on childhood asthma. Subgroup analyses by sex and age as well as sensitivity analyses of alternative degree of freedoms for calendar time, meteorological factors and PM are performed and confirmed the robustness of our results. Conclusion: Our findings provide supporting evidence that meteorological factors and PM might interactively affect childhood asthma, including antagonistic interaction between temperature and PM and synergistic interaction between air pressure and PM.

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“…In a study of 16 metropolitan cities in Northeast Asia, a statistically significant interaction between high temperature and air pollutants (PM10, O 3 , CO, NO 2 ) on mortality, with greater synergism effect of PM10 and O 3 on cardiovascular mortality, was found [ 45 ]. In a few Chinese studies, the authors found a synergistic effect of higher temperature with PM2.5 [ 46 , 47 ], PM10 [ 48 ] and O 3 [ 46 ] on circulatory mortality and both the hot and cold effect on PM10 and mortality [ 49 ]. In other parts of Asia, the cold effect on air pollution was observed in Korea (PM2.5) [ 50 ] and Hong Kong (PM10, NO 2 , O 3 ) [ 51 ].…”

Section: Discussionmentioning

confidence: 99%

Clustering of Environmental Parameters and the Risk of Acute Myocardial Infarction

Koo

Zheng

Pek

et al. 2022

IJERPH

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The association between days with similar environmental parameters and cardiovascular events is unknown. We investigate the association between clusters of environmental parameters and acute myocardial infarction (AMI) risk in Singapore. Using k-means clustering and conditional Poisson models, we grouped calendar days from 2010 to 2015 based on rainfall, temperature, wind speed and the Pollutant Standards Index (PSI) and compared the incidence rate ratios (IRR) of AMI across the clusters using a time-stratified case-crossover design. Three distinct clusters were formed with Cluster 1 having high wind speed, Cluster 2 high rainfall, and Cluster 3 high temperature and PSI. Compared to Cluster 1, Cluster 3 had a higher AMI incidence with IRR 1.04 (95% confidence interval 1.01–1.07), but no significant difference was found between Cluster 1 and Cluster 2. Subgroup analyses showed that increased AMI incidence was significant only among those with age ≥65, male, non-smokers, non-ST elevation AMI (NSTEMI), history of hyperlipidemia and no history of ischemic heart disease, diabetes or hypertension. In conclusion, we found that AMI incidence, especially NSTEMI, is likely to be higher on days with high temperature and PSI. These findings have public health implications for AMI prevention and emergency health services delivery during the seasonal Southeast Asian transboundary haze.

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Interaction Effects of Air Pollution and Climatic Factors on Circulatory and Respiratory Mortality in Xi’an, China between 2014 and 2016

Cited by 18 publications

References 52 publications

Air Quality Status in Wuhan City during and One Year after the COVID-19 Lockdown

Air Quality Status in Wuhan City during and One Year after the COVID-19 Lockdown

Interactive Effects of Meteorological Factors and Particulate Pollutants on Childhood Asthma: A Time Series Analysis in Shanghai, China

Clustering of Environmental Parameters and the Risk of Acute Myocardial Infarction

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