TY - JOUR
T1 - Health effects of air-quality regulations in Seoul Metropolitan Area
T2 - Applying synthetic control method to controlled-interrupted time-series analysis
AU - Kim, Soo Yeon
AU - Kim, Hyomi
AU - Lee, Jong Tae
N1 - Funding Information:
Funding: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (2020R1A2C1007274). This work was also supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2019R1A6A3A01096797).
Publisher Copyright:
© 2020 by the authors.
PY - 2020/9
Y1 - 2020/9
N2 - Despite enormous investment in air-quality regulations, there are only a few studies about the health effects of the air-quality regulations. By applying synthetic control methods to controlled-interrupted time-series analysis, this study aimed to test whether air-quality regulations implemented in Seoul metropolitan area since 2005 had reduced cardiovascular mortality rate in Seoul and Incheon. Each synthetic control for Seoul and Incheon was constructed to predict the counterfactual cardiovascular mortality rate through synthetic control methods. By using a synthetic control as a control group in controlled-interrupted time-series analysis, we tested whether the air-quality regulations had changed the trend of cardiovascular mortality rate in Seoul and Incheon after the intervention. The results showed a significant slope change in cardiovascular mortality rate in Seoul (coefficient: -0.001, 95% confidence interval (CI): -0.0015, -0.0004) and Incheon (coefficient: -0.0006, 95% CI: -0.0012, 0). This study suggests additional evidence that air-quality regulations implemented in the Seoul metropolitan areas since 2005 had beneficial effects on cardiovascular mortality rate in Seoul and Incheon.
AB - Despite enormous investment in air-quality regulations, there are only a few studies about the health effects of the air-quality regulations. By applying synthetic control methods to controlled-interrupted time-series analysis, this study aimed to test whether air-quality regulations implemented in Seoul metropolitan area since 2005 had reduced cardiovascular mortality rate in Seoul and Incheon. Each synthetic control for Seoul and Incheon was constructed to predict the counterfactual cardiovascular mortality rate through synthetic control methods. By using a synthetic control as a control group in controlled-interrupted time-series analysis, we tested whether the air-quality regulations had changed the trend of cardiovascular mortality rate in Seoul and Incheon after the intervention. The results showed a significant slope change in cardiovascular mortality rate in Seoul (coefficient: -0.001, 95% confidence interval (CI): -0.0015, -0.0004) and Incheon (coefficient: -0.0006, 95% CI: -0.0012, 0). This study suggests additional evidence that air-quality regulations implemented in the Seoul metropolitan areas since 2005 had beneficial effects on cardiovascular mortality rate in Seoul and Incheon.
KW - Accountability research
KW - Air pollution
KW - Cardiovascular mortality rate
KW - Controlled-interrupted time-series analysis
KW - Quasi-experimental study
KW - Synthetic control method
UR - http://www.scopus.com/inward/record.url?scp=85090410197&partnerID=8YFLogxK
U2 - 10.3390/ATMOS11080868
DO - 10.3390/ATMOS11080868
M3 - Article
AN - SCOPUS:85090410197
SN - 2073-4433
VL - 11
JO - Atmosphere
JF - Atmosphere
IS - 9
M1 - 868
ER -