• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Global Perspectives of Seasonal Changes of Suicide and Associations between Suicide and Weather

Research Project

Project/Area Number 16K19773
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Psychiatric science
Research InstitutionThe University of Tokyo (2018)
Nagasaki University (2016-2017)

Principal Investigator

Kim Yoonhee  東京大学, 大学院医学系研究科(医学部), 准教授 (40746020)

Research Collaborator Hashizume Masahiro  
Honda Yasushi  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsSuicide / Temperature / Season / Multi-country / suicide / temperature / seasonality of suicide / multi-country / season / time-series / Weather
Outline of Final Research Achievements

Although many previous studies have reported that higher temperature is associated with increases in the risk of suicide, there has been limited evidence of estimating the exact nonlinear temperature-suicide association. Thus, we aimed to examine the nonlinear temperature-suicide association across 341 locations in 12 countries comprehensively by using a unified analytical approach.
Our results showed that in general the risk of suicide increased as temperature increases, but it was leveled off at extremely high temperature. Also, we identified a critical range of temperatures that maximize the risk of suicide based upon the nonlinear curves of the temperature-suicide association.
This study would give a better understanding of suicide epidemiology and suggests a new perspective on how to implement suicide prevention programs at a population level. It can also help in generating future projections of mortality burdens from suicide under climate change.

Academic Significance and Societal Importance of the Research Achievements

本研究は、気温 - 自殺の短期的関連を明らかにする大規模観察疫学研究であり、自殺率の高い人口集団における気候変動の健康影響評価に重要な示唆を提供する。
本研究は、気温 - 自殺の関係の理解を深め、自殺予防のための予測モデル構築の基礎資料となる。また、気候変動により今後猛暑日の増加が予測されているが、精神健康保健領域における疾病負荷の推定に、より正確で洗練されたモデルの構築と推計法が必要であることを示唆する。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (10 results)

All 2018 2017 2016 Other

All Journal Article (5 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (3 results) (of which Int'l Joint Research: 3 results) Remarks (2 results)

  • [Journal Article] Association between diurnal temperature range and mortality modified by temperature in Japan, 1972-2015: investigation of spatial and temporal patterns for 12 cause-specific deaths2018

    • Author(s)
      Lee W, Kim Y, Honda Y, Kim H
    • Journal Title

      Environment International

      Volume: 119 Pages: 379-387

    • DOI

      10.1016/j.envint.2018.06.020

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Changing Susceptibility to Non-Optimum Temperatures in Japan, 1972-2012: The Role of Climate, Demographic, and Socioeconomic Factors2018

    • Author(s)
      Chung Y, Yang D, Gasparrini A, Vicedo-Cabrera AM, Fook Sheng Ng C, Kim Y, Honda Y, Hashizume M
    • Journal Title

      Environ Health Perspect

      Volume: 126(5) Issue: 5 Pages: 57002-57002

    • DOI

      10.1289/ehp2546

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Air Pollution and Suicide in 10 Cities in Northeast Asia: A Time-Stratified Case-Crossover Analysis2018

    • Author(s)
      Kim Y, Ng CFS, Chung Y, Kim H, Honda Y, Guo YL, Lim Y-H, Chen B-Y, Page LA, Hashizume M
    • Journal Title

      Environmental Health Perspectives

      Volume: 126(3):037002 Issue: 7

    • DOI

      10.1289/ehp3901

    • NAID

      120006987318

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Air Pollution and Suicide in 10 Cities in Northeast Asia:A Time-Stratified Case-Crossover Analysis2018

    • Author(s)
      Kim Y, Ng CFS, Chung Y, Kim H, Honda Y, Guo YL, Lim Y-H, Chen B-Y, Page LA, Hashizume M
    • Journal Title

      Environmental Health Perspectives

      Volume: 126 Issue: 3 Pages: 037002-037002

    • DOI

      10.1289/ehp2223

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Heat-related mortality in Japan after the 2011 Fukushima disaster: An analysis of potential influence of reduced electricity consumption2017

    • Author(s)
      Kim Y, Gasparrini A, Hashizume M, Honda Y, Ng CFS, Armstrong B
    • Journal Title

      Environmental Health Perspectives

      Volume: 125 Issue: 7 Pages: 077005-077005

    • DOI

      10.1289/ehp493

    • NAID

      120006987379

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Suicide and ambient temperature: A multi-city multi-country study2018

    • Author(s)
      Kim Y, Kim H, Gasaparrini A, Armstrong B, Honda Y, Chung Y, Ng CFS, Hashizume M on behalf of the MCC Collaborative Research Network
    • Organizer
      ISES-ISEE 2018 Joint Annual Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Seasonal changes in suicide risk adjusting for weather factors2017

    • Author(s)
      Kim, Yoonhee
    • Organizer
      International Society for Environmental Epidemiology (ISEE)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Air Pollution and Suicide in Seoul, Tokyo, and Taipei: A Time-Stratified Case-Crossover Analysis2016

    • Author(s)
      Kim Yoonhee
    • Organizer
      International Society of Environmental Epidemiology
    • Place of Presentation
      Auditorium Parco della Musica, Rome, Italy
    • Year and Date
      2016-09-02
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Remarks] Department of Global Environmental Health

    • URL

      https://sites.google.com/m.u-tokyo.ac.jp/envhealth/publications?authuser=1

    • Related Report
      2018 Annual Research Report
  • [Remarks] MCC Collaborative Research Network

    • URL

      http://mccstudy.lshtm.ac.uk/conferences/

    • Related Report
      2018 Annual Research Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi