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Department of Neuropsychiatry, Oita University Faculty of Medicine
Department of Clinical Psychology, Hiroshima International University, Japan
Correspondence: Professor Takeshi Terao, Department of Neuropsychiatry, Oita University Faculty of Medicine, Idaigaoka 1-1, Hasama-machi, Yufu, Oita, 879-5593, Japan. Email: terao{at}med.oita-u.ac.jp
See invited commentary, p.
466, this issue.
Although lithium is known to prevent suicide in people with mood disorders, it is uncertain whether lithium in drinking water could also help lower the risk in the general population. To investigate this, we examined lithium levels in tap water in the 18 municipalities of Oita prefecture in Japan in relation to the suicide standardised mortality ratio (SMR) in each municipality. We found that lithium levels were significantly and negatively associated with SMR averages for 2002–2006. These findings suggest that even very low levels of lithium in drinking water may play a role in reducing suicide risk within the general population.
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T. Terao, H. Ohgami, I. Shiotsuki, N. Ishii, and N. Iwata Authors' reply: The British Journal of Psychiatry, September 1, 2009; 195(3): 271 - 272. [Full Text] [PDF] |
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