Identifying Bio-signatures of Suicidal Subtypes in Veterans

自杀行为是一种复杂的现象，从低致命性、低意图的冲动行为到高- 致命性高意图自杀行为，因此可能与多种潜在亚型相关。遗传 在几项研究中已经确定了自杀行为的相关因素，但其效应量通常是 适度，可能是因为自杀人群和行为的异质性。使用百万 老兵计划伽玛计算平台，我们提出了一个独特的统计和机器的组合 学习基于电子病历和自我报告开发我们的亚型的方法;然后是 对所得亚型进行仔细的基因组分析，并与从相同基因组中选择的两个对照组进行比较。 队列，有和没有精神健康障碍。该项目旨在开发复杂的诊断工具， 预防美国退伍军人未来的自杀行为。此外，从中鉴定的生物标志物 研究将直接应用于PI和合作研究者的高风险VA纵向研究的验证 患者，来自同一人群的自然验证样本;有希望结合两者的功效 问题研究

Suicidal behavior is a complex phenomenon, ranging from low-lethality, low-intent impulsive acts to high- lethality high-intent suicidal acts, and thus likely to be associated with multiple underlying subtypes. Genetic associates of suicidal behavior have been identified in several studies, yet the effect sizes for are usually modest, possibly because of the heterogeneity in the suicidal population and the behavior. Using the Million Veteran Program Gamma computational platform, we propose a unique combination of statistical and machine learning methods to develop our subtypes based on Electronic Patient Records and self-reports; followed by a careful genomic analysis of the resulting subtypes compared to two control groups chosen from the same cohort, with and without mental health disorders. This project aims to develop sophisticated diagnosis tools for preventing future suicidal behavior in US Veterans at high risk. Moreover, the biomarkers identified from this study will be directly applied for validation in the PI and co-investigators’ longitudinal study of high-risk VA patients, a natural validation sample from the same population; promising a combination of the power of both studies.