ArticleEnvironment international2020
Nonlinear temperature-suicide association in Japan from 1972 to 2015: Its heterogeneity and the role of climate, demographic, and socioeconomic factors.
Article in Environment international, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 2 of them syntheses that pooled it.
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Who cites it
18 citing papers in PubMed, 2 syntheses or guidelines pooled it, 38 citations in OpenAlex.
- A Systematic Literature Review of the Impact of Climate Change on the Global Demand for Psychiatric Services.International journal of environmental research and public health · 2023Pooled it
- Suicide and Associations with Air Pollution and Ambient Temperature: A Systematic Review and Meta-Analysis.International journal of environmental research and public health · 2021Pooled it
- Mobile App-Based Tracking of Daily Explicit and Implicit Sense of Agency Among Adults Living in Japan: Longitudinal Observational Study.JMIR formative research · 2026Observational
- Climate change anxiety among psychiatric outpatients: associations with psychiatric symptoms and experience with climate change and natural disasters.Frontiers in psychiatry · 2026Article
- A short-term association between hospitalizations for mental disorders and ambient temperature in Japan: an ecological study using the LIFE Study data.Environmental health and preventive medicine · 2026Article
- The correlation between high temperature and cognitive function: a CHARLS 2018 cross-sectional study.Archives of public health = Archives belges de sante publique · 2025Article
- Ambient Temperature and Suicide Risk in Thailand: Evidence from Chiang Mai and Bangkok Provinces.Environment & health (Washington, D.C.) · 2025Article
- Toward a Cohort Perspective of Climate Epidemiology: The Case of Examining Intergenerational Inequalities in Susceptibility to Non-Optimal Temperatures in Japan.Environmental health perspectives · 2025Article
- The graded heat-health risk forecast and early warning with full-season coverage across China: a predicting model development and evaluation study.The Lancet regional health. Western Pacific · 2025Article
- Ambient temperature, suicide, and urbanicity: A nationwide time-stratified case-crossover study in South Korea.PloS one · 2025Article
- A systematic review of the effects of chronic, slow-onset climate change on mental health.Nature. Mental health · 2024Article
- Projections of Temperature-Related Suicide under Climate Change Scenarios in Japan.Environmental health perspectives · 2023Article
- Regional disparities in suicide among patients with cancer: A nationwide population-based study in Japan.Cancer medicine · 2023Article
- Methods in Public Health Environmental Justice Research: a Scoping Review from 2018 to 2021.Current environmental health reports · 2023Article
- Temperature-related mortality in China from specific injury.Nature communications · 2023Article
- Association between daily ambient temperature and drug overdose in Tokyo: a time-series study.Environmental health and preventive medicine · 2022Article
- Spatial statistical analysis of regional disparities in suicide among policy units in Japan: Using the Bayesian hierarchical model.PLOS global public health · 2022Article
- Seasonality of suicide: a multi-country multi-community observational study.Epidemiology and psychiatric sciences · 2020Observational
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Authors and funding
9 authors at 5 institutions in 3 countries.
Funding
Abstract
It has been reported that suicide is associated with ambient temperature; however, the heterogeneity in this association and its underlying factors have not been extensively investigated. Therefore, we investigated the spatial and temporal variation in the temperature-suicide association and examined climatic, demographic, and socioeconomic factors that may underlie such heterogeneity. We analyzed the daily time-series data for the suicide counts and ambient temperature, which were collected for the 47 prefectures of Japan from 1972 to 2015, using a two-stage analysis. In the first stage, the prefecture-specific temperature-suicide association was estimated by using a generalized linear model. In the second stage, the prefecture-specific associations were pooled, and key factors explaining the spatial and temporal variation were identified by using mixed effects meta-regression. Results showed that there is an inverted J-shape nonlinear association between temperature and suicide; the suicide risk increased with temperature but leveled off above 24.4 °C. The nationwide relative risk (RR) for the maximum suicide temperature versus 5th temperature percentile (2.9 °C) was estimated as 1.26 (95% CI: 1.22, 1.29). The RRs were larger for females than for males (1.32 vs. 1.22) and larger for elderly people (≥65 y) than for the non-elderly (15-64 y) (1.51 vs. 1.18). The RRs were larger for rural prefectures, which are characterized by smaller population, higher proportions of females and elderly people, and lower levels of financial capability and the proportion of highly educated people. The RRs were also larger in colder and less humid prefectures. These findings may help in understanding the potential mechanism of the temperature-suicide association and projecting the future risk of suicide under climate change.
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