The number of deaths by suicide after the Great East Japan Earthquake based on demographic statistics in the coastal and non-coastal areas of Iwate, Miyagi, and Fukushima prefectures

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  • 人口動態統計に基づく東日本大震災後の自殺死亡数：岩手県・宮城県・福島県の沿岸部と沿岸部以外の推移
  • ジンコウ ドウタイ トウケイ ニ モトズク ヒガシニホン ダイシンサイ ゴ ノ ジサツ シボウスウ : イワテケン ・ ミヤギケン ・ フクシマケン ノ エンガンブ ト エンガンブ イガイ ノ スイイ

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Abstract

<p>Objective　The number of deaths by suicide after the Great East Japan Earthquake was surveyed based on demographic statistics. In particular, this study examined whether or not there were excessive deaths due to suicide (excluding people who were injured in the earthquake) after the Great East Japan Earthquake disaster. This examination surveyed municipalities in coastal and non-coastal areas of Iwate, Miyagi, and Fukushima prefectures (referred to below as the “three prefectures”).</p><p>Methods　The demographic statistics questionnaire survey information supplied by Article 33 of the Statistics Act (Ministry of Health, Labour and Welfare's published statistics Vol. 0925 No.4, September 25th, 2014) were used as the basic data with particular reference to the information on the deaths from January 1st, 2010 to March 31st, 2013. The information obtained included the date of death, the municipality where the address of the deceased was registered, the gender of the deceased, age at the time of death, and cause of death codes (International Classification of Disease Codes 10th revision: ICD-10). Additionally, information was gathered about the population based on the resident register from 2009 to 2013 and the 2010 National Census; the number of deaths by suicide was then totalled by period and area. The areas were classified as municipalities within three prefectures and those located elsewhere using the municipality where the address of the deceased was registered.</p><p>Results　The SMR for suicides did not show a tendency to increase for coastal or non-coastal areas throughout the two-year period after the earthquake disaster (from March 2011 to February 2013).</p><p>　The SMR for the three prefectures 0-1 years after the disaster compared with the year before the disaster was 0.92 and for 1-2 years after the disaster was 0.93. Both these values were significantly low. Looking at both the non-coastal and coastal areas from each of the three prefectures, the SMR for suicides for 0-1 and 1-2 years after the disaster compared with the year before the disaster ranged from 0.73 to 1.07. None were significantly high.</p><p>Conclusion　The above results indicate that there was no increase in deaths by suicide in these three prefectures in the two years following the earthquake disaster.</p>

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