Capability-based models propose that people die by suicide because they want to, and they can. Despite the intuitive appeal of this hypothesis, longitudinal evidence testing its predictive validity has been limited. This study tested the predictive validity of the desire-capability hypothesis. A total of 1,020 self-injuring and/or suicidal adults were recruited worldwide online from suicide, self-injury, and mental health web forums. After baseline assessment, participants completed follow-up assessments at 3, 14, and 28 days after baseline. Participant retention was high (>90%) across all follow-up assessments. Analyses examined the effect of the statistical interaction between suicidal desire and indices of capability for suicide on future nonfatal suicide attempts. Main analyses focused on the fearlessness about death facet of capability for suicide; exploratory analyses examined preparations for suicide. Logistic regression was used to predict suicide attempt status at follow-up; zero-inflated negative binomial models were implemented to predict the frequency of nonfatal suicide attempts at follow-up. Results were consistent across models, finding very little evidence of the desire-capability interaction as a significant predictor of suicide attempt status or frequency at follow-up. We close with a discussion of the limitations of this study as well as the implications of our findings for future suicide science. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

中文翻译：

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自杀欲望和自杀能力的各个方面是否可以预测未来的自杀行为？对欲望能力假设的纵向检验。

基于能力的模型提出人们死于自杀是因为他们想要，而且他们可以。尽管这一假设具有直观的吸引力，但测试其预测有效性的纵向证据却很有限。本研究检验了欲望能力假设的预测有效性。全球共有 1,020 名自伤和/或自杀的成年人从自杀、自伤和心理健康网络论坛在线招募。基线评估后，参与者在基线后 3、14 和 28 天完成后续评估。在所有后续评估中，参与者的保留率都很高 (>90%)。分析检查了自杀欲望和自杀能力指数之间的统计相互作用对未来非致命性自杀企图的影响。主要分析集中在自杀能力的无畏死亡方面；探索性分析检查了自杀的准备情况。Logistic 回归用于预测随访时的自杀企图状态；实施零膨胀负二项式模型来预测后续非致命自杀企图的频率。结果在模型中是一致的，发现很少有证据表明欲望-能力相互作用是自杀未遂状态或随访频率的重要预测指标。我们最后讨论了这项研究的局限性以及我们的发现对未来自杀科学的影响。（PsycInfo 数据库记录 (c) 2021 APA，保留所有权利）。Logistic 回归用于预测随访时的自杀企图状态；实施零膨胀负二项式模型来预测后续非致命自杀企图的频率。结果在模型中是一致的，发现很少有证据表明欲望-能力相互作用是自杀未遂状态或随访频率的重要预测指标。我们最后讨论了这项研究的局限性以及我们的发现对未来自杀科学的影响。（PsycInfo 数据库记录 (c) 2021 APA，保留所有权利）。Logistic 回归用于预测随访时的自杀企图状态；实施零膨胀负二项式模型来预测后续非致命自杀企图的频率。结果在模型中是一致的，发现很少有证据表明欲望-能力相互作用是自杀未遂状态或随访频率的重要预测指标。我们最后讨论了这项研究的局限性以及我们的发现对未来自杀科学的影响。（PsycInfo 数据库记录 (c) 2021 APA，保留所有权利）。发现很少有证据表明欲望-能力相互作用是自杀未遂状态或随访频率的重要预测指标。我们最后讨论了这项研究的局限性以及我们的发现对未来自杀科学的影响。（PsycInfo 数据库记录 (c) 2021 APA，保留所有权利）。发现很少有证据表明欲望-能力相互作用是自杀未遂状态或随访频率的重要预测指标。我们最后讨论了这项研究的局限性以及我们的发现对未来自杀科学的影响。（PsycInfo 数据库记录 (c) 2021 APA，保留所有权利）。