School of Management, Harbin Institute of Technology , Harbin, China .
Telemed J E Health. 2018 Sep;24(9):702-709. doi: 10.1089/tmj.2017.0189. Epub 2018 Jan 2.
Suicide is a leading cause of death in China, and so suicide intervention on social media is an important issue in the field of public health. Sina Weibo (Weibo) is an emerging surveillance tool that may provide online assistance for users at the risk of suicide.
Keyword-based methods and supervised classifiers were employed to conduct this research. A control group was established to explore the differences between Weibo users with suicidal ideation (USI) and the general population.
A total of 114 USI were detected from 1 million active Weibo users. By studying the negative postings of these USI, disclosure of the reasons for their bad moods was the most common theme. The emotions of USI tend to be particularly down between 05:00 pm and midnight. Use of the first-person pronoun by Weibo USI is significantly frequent.
Our findings may help to identify individuals with suicidal ideation who are not identified by the traditional clinical approach. Consequently, detecting and helping individuals who may be at risk of committing suicide may become more efficient.
自杀是中国的首要死因，因此社交媒体上的自杀干预是公共卫生领域的一个重要问题。新浪微博（Weibo）是一种新兴的监测工具，它可能为有自杀风险的用户提供在线帮助。
本研究采用基于关键词的方法和有监督的分类器。建立对照组以探索有自杀意念的微博用户（USI）与普通人群之间的差异。
从 100 万活跃微博用户中检测到 114 名 USI。通过研究这些 USI 的负面帖子，情绪不佳的原因披露是最常见的主题。USI 的情绪往往在下午 5 点到午夜之间特别低落。微博 USI 使用第一人称代词的频率显著较高。
我们的发现可能有助于识别传统临床方法无法识别的有自杀意念的个体。因此，检测和帮助可能有自杀风险的个体可能会变得更加高效。
