Effect of air pollutant emission reduction policies on hospital visits for asthma in Seoul, Korea; Quasi-experimental study

Hyomi Kim, Honghyok Kim, Jong-Tae Lee

Research output: Contribution to journalArticle

Abstract

To improve air quality and reduce adverse health effects due to air pollutants, Seoul metropolitan government has introduced emission reduction policies in Seoul metropolitan area since 2007. As a result, air quality in Seoul has improved. However, no study has reported whether emission reduction policies have affected respiratory morbidities in Korea. Thus, we aimed to assess an association between air pollutant emissions and ambient concentrations, and the effect of implemented emission reduction policies on asthma. The population of Daejeon, one of the metropolitan cities in Korea other than Seoul was used as a reference population to adjust for possible long-term background trend. Trends of air pollutant emissions, ambient concentrations, and hospital visit rates in Seoul and Daejeon were evaluated using descriptive statistics. To evaluate the possible beneficial effect of air pollutant emission reduction policies implemented since 2007 on hospital visits for asthma in Seoul, we conducted interrupted time-series analysis. As a result, we found evidence for the association between emission reductions and reduced ambient concentrations. Trends in hospital visit rates for asthma, which were previously increasing in Seoul, have decreased since the implementation of the policies. Prevented hospital visits cases for asthma in the total population and younger population (0–18 years) were estimated as 500,000 (11.3% of hospital visit cases if there was no intervention) cases and 320,000 (15.5% of hospital visit cases if there was no intervention) cases, respectively in Seoul. Our study provides evidence for the possible beneficial effect of emission reduction policies on hospital visits for asthma.

Original languageEnglish
Article number104954
JournalEnvironment International
Volume132
DOIs
Publication statusPublished - 2019 Nov 1

Fingerprint

Air Pollutants
asthma
Korea
experimental study
Asthma
air quality
Population
Air
young population
Local Government
time series analysis
morbidity
Non-Randomized Controlled Trials
Seoul
emission reduction
pollutant emission
policy
hospital
air pollutant
effect

Keywords

  • Accountability
  • Air pollutant emission
  • Air pollution
  • Asthma
  • Environmental policy
  • Interrupted time series

ASJC Scopus subject areas

  • Environmental Science(all)

Cite this

Effect of air pollutant emission reduction policies on hospital visits for asthma in Seoul, Korea; Quasi-experimental study. / Kim, Hyomi; Kim, Honghyok; Lee, Jong-Tae.

In: Environment International, Vol. 132, 104954, 01.11.2019.

Research output: Contribution to journalArticle

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