Wanwisa Chujit1, Phongtape Wiwatanadate This email address is being protected from spambots. You need JavaScript enabled to view it.1, Athavudh Deesomchok2, Khajornsak Sopajaree3, Kamal Eldeirawi4, Ying I. Tsai This email address is being protected from spambots. You need JavaScript enabled to view it.3,5,6

Department of Community Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
Division of Pulmonary, Critical Care Medicine and Allergy, Department of Medicine, Faculty of Medicine, Chiang Mai University, Chiang Mai 50200, Thailand
Department of Environmental Engineering, Chiang Mai University, Chiang Mai 50200, Thailand
Department of Health Systems Science, College of Nursing, University of Illinois at Chicago, Chicago, IL 60612, USA
Department of Environmental Engineering and Science, Chia Nan University of Pharmacy and Science, Tainan 71710, Taiwan
Indoor Air Quality Research and Service Center, Chia Nan University of Pharmacy and Science, Tainan 71710, Taiwan


 

Received: March 6, 2020
Revised: April 27, 2020
Accepted: April 28, 2020

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.4209/aaqr.2020.03.0092 

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Cite this article:

Chujit, W., Wiwatanadate, P., Deesomchok, A., Sopajaree, K., Eldeirawi, K. and Tsai, Y.I. (2020). Air Pollution Levels Related to Peak Expiratory Flow Rates among Adult Asthmatics in Lampang, Thailand. Aerosol Air Qual. Res. 20: 1398–1410. https://doi.org/10.4209/aaqr.2020.03.0092


HIGHLIGHTS

  • SO2, PM10 max (lag 6) and NO2 max (lag 2) were inversely associated with PEFR.
  • NO2 (lag 4) and O3 max (lag 3) were positively associated with PEFR.
  • Lagged effects were different for different pollutants.
 

ABSTRACT


Asthmatics may suffer harmful effects on their health due to air pollution. This study assesses the association between measured air pollution levels and peak expiratory flow rates (PEFR) among adults with asthma in Mae Moh district, Lampang, Thailand. The year-long study, resulting in 12,045 data points from 33 participants, was performed from November 2015 to October 2016. PEFR were compared against levels of CO, NO2, O3, SO2, PM2.5 and PM10. A positive association between the daily mean concentration of NO2 (lag 4) and PEFR on waking (morning PEFR): an increase of 1 ppb in NO2 (lag 4) was associated an increase of 1.34 L min-1 (95% Confidence interval (CI): 0.25, 2.44) in PEFR. Also, interaction between NO2 (lag 4) and PM10 (lag 6) was multiplicatively associated with decreased morning PEFR by -0.015 L min-1 at 95% CI. NO2 max (lag 2) and PM10 max (lag 6) were associated negatively with coefficients of -0.07 and -0.013 at 95% CI, respectively. Furthermore, in morning PEFR, with PM2.5 max included in the generalized estimating equation model, only NO2 max (lag 2) and CO max (lag 6) associated negatively with coefficients of -0.08 and -1.71 at 95% CI, respectively. O3 max (lag 3) and PM2.5 max were positively related to evening PEFR with coefficients of 0.078 and 0.029 at 95% CI, respectively. The daily average PEFR and NO2 (lag 4) associated positively with a coefficient of 0.15 at 95% CI, while SO2 associated negatively with a coefficient of -0.47 at 95% CI. Conversely, NO2 max (lag 2) associated negatively with a coefficient of -0.05 at 95% CI, while O3 max (lag 3) associated positively with a coefficient of 0.06 at 95% CI. The findings indicated are that information regarding pollutants’ delayed effects and the negative effects of some pollutants on PEFR enable the forecasting of health effects and take serious actions to prevent those pollutants at their sources.


Keywords: Air pollution; Peak expiratory flow rates; Asthmatic patients; Mae Moh.



Aerosol Air Qual. Res. 20:1398-1410. https://doi.org/10.4209/aaqr.2020.03.0092 


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