2021 Fiscal Year Research-status Report
A Nationwide Health Risk Assessment of PM2.5 Exposure by Examining the Regional Concentrations-Response Relations in a Population-Based Epidemiological Study in Japan
| Project/Area Number |
21K17894
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| Research Institution | University of Tsukuba |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | air pollution / particulate matter / mortality / health risk / time series study |
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| Outline of Annual Research Achievements |
Data of ambient PM2.5 from monitoring stations across Japan were collected. The corresponding periods of daily meteorological variables, including temperature and relative humidity, were obtained. All-cause, coded by the International Classification of Diseases 10th revision (ICD-10: A00-Y89), cardiovascular (ICD-10: I00-99), and respiratory (ICD-10: J00-99) mortality data for the Japanese population were also obtained. Cause-specific mortalities were stratified into three age subgroups: less than 15, 16-64, and above 65 years. Mortality data were statistically manipulated to link with the meteorological and air pollution data to construct the daily time-series dataset for the analyses.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
Data collections were completed as planned. Descriptive statistics were attained. Constructed daily time series are ready to be analyzed in accordance with the statistical model derived after the literature review.
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| Strategy for Future Research Activity |
In this fiscal year (2022), statistical analyses will be performed to quantify the associations between PM2.5 on mortality. Firstly, prefectural estimates of the PM effects will be investigated by utilizing a time-series quasi-Poisson model. All local concentration-response functions will be formulated using a unified statistical design to assess and compare the shapes for each location. Then a random-effect meta-analysis will be fitted to pool the regional and national assessments. Stratified analyses by age groups and cause categories will be performed.
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| Causes of Carryover |
Due to the Covid-19 pandemic, domestic and international traveling was avoided and postponed. Therefore, I expect several travels in this FY 2022 if the trajectory of the COVID-19 pandemic decline.
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Research Products
(5 results)
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[Presentation] Temporal changes in the short-term association between ambient air pollution and mortality in 10 major cities in Japan from 1977 to 20152021
Author(s)
Hironori Nishikawa, Xerxes Tesoro Seposo, Lina Madaniyazi, Makiko Yamagami, Kayo Ueda, Masahiro Hashizume, Yoonhee Kim, Yasushi Honda, Satbyul Estella Kim, Seiji Sugata, Akinori Takami, Chris Fook Sheng Ng
Organizer
The 62nd Annual Meeting of Japan Society for Atmospheric Environment
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