Miami University, Oxford, OH, USA.
Suicide Life Threat Behav. 2019 Dec;49(6):1609-1620. doi: 10.1111/sltb.12541. Epub 2019 Feb 7.
Past work has documented a cross-sectional relationship between eating disorders (ED) and suicidality, but few studies have examined the directionality of this relationship. Informed by the interpersonal-psychological theory of suicide (IPTS), this study examines the bidirectional, longitudinal relationship between ED symptoms and two determinants of suicide ideation-thwarted belongingness (TB) and perceived burdensomeness (PB).
Ninety-two treatment-seeking individuals with ED (94.5% White, 95.6% female) completed baseline (T1) measures of ED symptoms along with TB and PB. Of those, 75 (81.5%) completed a follow-up assessment eight weeks later (T2).
Separate linear regression models revealed that T1 ED symptoms did not predict T2 TB (b = .03, p = .42) or T2 PB (b = -.01, p = .68). Similarly, T1 TB did not predict T2 ED symptoms (b = .25, p = .37). T1 PB did significantly predict T2 ED symptoms (b = 0.52, p = .04). Further, among participants with AN/sub-AN, T1 TB and PB predicted T2 ED symptoms (p's ≤ .03).
Our results reveal the need for a nuanced understanding of the relationship between ED and suicidality. This study found that PB predicts greater ED symptoms and, among the AN/sub-AN sample, TB does as well.
既往研究已经记录了饮食失调（ED）与自杀意念之间的横断面关系，但很少有研究检验这种关系的方向性。本研究以人际心理理论的自杀（IPTS）为理论依据，检验 ED 症状与自杀意念的两个决定因素——归属感受挫（TB）和感知负担（PB）之间的双向、纵向关系。
92 名接受 ED 治疗的个体（94.5%为白人，95.6%为女性）在基线（T1）时完成 ED 症状评估，以及 TB 和 PB 评估。其中，75 人（81.5%）在八周后（T2）完成了随访评估。
单独的线性回归模型显示，T1 ED 症状不能预测 T2 TB（b=0.03，p=0.42）或 T2 PB（b=-0.01，p=0.68）。同样，T1 TB 也不能预测 T2 ED 症状（b=0.25，p=0.37）。T1 PB 显著预测 T2 ED 症状（b=0.52，p=0.04）。此外，在 AN/sub-AN 患者中，T1 TB 和 PB 预测了 T2 ED 症状（p 值均≤0.03）。
我们的研究结果揭示了需要对 ED 和自杀意念之间的关系有更细致的理解。本研究发现，PB 预测 ED 症状更严重，而在 AN/sub-AN 样本中，TB 也是如此。
