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Open AccessArticle

Trends in Suicide Mortality by Method from 1979 to 2016 in Japan

1
Graduate School of Public Health, St. Luke’s International University, Tokyo 104-0045, Japan
2
Department of Global Health Policy, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
3
Institute of Global Health Policy Research, Bureau of International Health Cooperation, National Center for Global Health and Medicine, Tokyo 162-8655, Japan
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2019, 16(10), 1794; https://doi.org/10.3390/ijerph16101794
Received: 2 May 2019 / Revised: 16 May 2019 / Accepted: 17 May 2019 / Published: 21 May 2019
(This article belongs to the Section Mental Health)
Suicide is a major public health concern in Japan. This study aimed to characterize the trends in suicide mortality in Japan by method since 1979. Using data from the Japan vital registration system, we calculated age-standardized rates of suicide mortality separately by sex and method. We conducted a log-linear regression of suicide mortality rates separately by sex, and linear regression analysis of the proportion of deaths due to hanging, including a test for change in level and trend in 1998. While crude suicide rates were static over the time period, age-adjusted rates declined. The significant increase in suicide mortality in 1998 was primarily driven by large changes in the rate of hanging, with suicide deaths after 1998 having 36.7% higher odds of being due to hanging for men (95% CI: 16.3–60.8%), and 21.9% higher odds of being due to hanging for women (95% CI: 9.2–35.9%). Hanging has become an increasingly important method for committing suicide over the past 40 years, and although suicide rates have been declining continuously over this time, more effort is needed to prevent hanging and address the potential cultural drivers of suicide if the rate is to continue to decline in the future. View Full-Text
Keywords: suicide; Japan; injury; Poisson regression; mortality suicide; Japan; injury; Poisson regression; mortality
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MDPI and ACS Style

Dhungel, B.; Sugai, M.K.; Gilmour, S. Trends in Suicide Mortality by Method from 1979 to 2016 in Japan. Int. J. Environ. Res. Public Health 2019, 16, 1794. https://doi.org/10.3390/ijerph16101794

AMA Style

Dhungel B, Sugai MK, Gilmour S. Trends in Suicide Mortality by Method from 1979 to 2016 in Japan. International Journal of Environmental Research and Public Health. 2019; 16(10):1794. https://doi.org/10.3390/ijerph16101794

Chicago/Turabian Style

Dhungel, Bibha; Sugai, Maaya K.; Gilmour, Stuart. 2019. "Trends in Suicide Mortality by Method from 1979 to 2016 in Japan" Int. J. Environ. Res. Public Health 16, no. 10: 1794. https://doi.org/10.3390/ijerph16101794

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