The aims of the present study thus were (a) to further investigate the association between lithium levels in drinking water and suicide rates by adjusting relevant factors using the so far largest available dataset in Japan, (b) to confirm sex differences, (c) to estimate the effects of long‐term exposure to trace lithium, (d) to investigate the effects of drinking bottled instead of tap water, and (e) to exploratorily investigate which lithium levels may be associated with lower suicide rates.

中文翻译：

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饮用水中的锂和预防自杀：日本最大的全国性流行病学研究

因此，本研究的目的是（a）通过使用日本迄今为止最大的可用数据集调整相关因素，进一步研究饮用水中锂含量与自杀率之间的关联，（b）确认性别差异，（c）评估长期接触微量锂的影响，(d) 研究饮用瓶装水而不是自来水的影响，以及 (e) 探索性研究哪些锂水平可能与较低的自杀率相关。