Objectives To assess the short term temporal variations in suicide risk related to the day of the week and national holidays in multiple countries. Design Multicountry, two stage, time series design. Setting Data from 740 locations in 26 countries and territories, with overlapping periods between 1971 and 2019, collected from the Multi-city Multi-country Collaborative Research Network database. Participants All suicides were registered in these locations during the study period (overall 1 701 286 cases). Main outcome measures Daily suicide mortality. Results Mondays had peak suicide risk during weekdays (Monday-Friday) across all countries, with relative risks (reference: Wednesday) ranging from 1.02 (95% confidence interval (CI) 0.95 to 1.10) in Costa Rica to 1.17 (1.09 to 1.25) in Chile. Suicide risks were lowest on Saturdays or Sundays in many countries in North America, Asia, and Europe. However, the risk increased during weekends in South and Central American countries, Finland, and South Africa. Additionally, evidence suggested strong increases in suicide risk on New Year’s day in most countries with relative risks ranging from 0.93 (95% CI 0.75 to 1.14) in Japan to 1.93 (1.31 to 2.85) in Chile, whereas the evidence on Christmas day was weak. Suicide risk was associated with a weak decrease on other national holidays, except for Central and South American countries, where the risk generally increased one or two days after these holidays. Conclusions Suicide risk was highest on Mondays and increased on New Year’s day in most countries. However, the risk of suicide on weekends and Christmas varied by country and territory. The results of this study can help to better understand the short term variations in suicide risks and define suicide prevention action plans and awareness campaigns. Data have been collected within the Multi-Country Multi-City (MCC) Collaborative Research Network () under a data sharing agreement and cannot be made publicly available. Researchers can refer to MCC participants listed as coauthors for information on accessing the data for each country. However, the R code with the sample (mock-up) data is available from the corresponding author.

中文翻译：

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假期和星期几与自杀风险的关联：多县、两个阶段、时间序列研究


目的 评估多个国家与星期几和国定假日相关的自杀风险的短期时间变化。设计 多国、两阶段、时间序列设计。设置 来自 26 个国家和地区的 740 个地点的数据，在 1971 年至 2019 年之间有重叠时期，从多城市多国合作研究网络数据库中收集。参与者 在研究期间，所有自杀均在这些地点登记（总共 1 701 286 例）。主要结局指标 每日自杀死亡率。结果在所有国家/地区，周一在工作日（周一至周五）的自杀风险达到峰值，相对风险（参考：周三）从哥斯达黎加的 1.02（95% 置信区间 （CI） 0.95 至 1.10）到智利的 1.17（1.09 至 1.25）不等。在北美、亚洲和欧洲的许多国家，周六或周日的自杀风险最低。然而，在南美洲和中美洲国家、芬兰和南非的周末，风险有所增加。此外，有证据表明，在大多数国家/地区，元旦自杀风险大幅增加，相对风险范围从日本的 0.93（95% CI 0.75 至 1.14）到智利的 1.93（1.31 至 2.85）不等，而圣诞节的证据较弱。自杀风险与其他国定假日的微弱下降相关，但中美洲和南美洲国家除外，这些国家的风险通常在这些假期后一两天增加。结论 在大多数国家，周一自杀风险最高，元旦自杀风险增加。然而，周末和圣诞节的自杀风险因国家和地区而异。 本研究的结果有助于更好地了解自杀风险的短期变化，并确定自杀预防行动计划和宣传活动。数据是根据数据共享协议在多国多城市 （MCC） 合作研究网络 （） 内收集的，无法公开提供。研究人员可以参考列为合著者的 MCC 参与者，以获取有关访问每个国家/地区数据的信息。但是，包含示例（模型）数据的 R 代码可从相应作者处获得。