Abstract
BackgroundInteroceptive deficits have been found to be associated with suicidal ideation and behavior. However, an objective measure of interoceptive accuracy has not been investigated in participants with suicide ideation, by now. This study aimed at investigating interoceptive accuracy and sensibility in persons with and without suicide ideation (SI) while controlling for severity of depressive symptoms.MethodNinety-five participants (age: M = 34.8, SD = 11.6, n = 56 female [58.9%]; n = 51 patients with a Major Depressive Disorder and n = 44 healthy participants) were assessed for interoceptive accuracy and sensibility, depression and SI.ResultsTwenty-five participants (26%) reported SI. They showed interoceptive accuracy comparable to persons without SI (t = −.81, p = .422), but significantly lower interoceptive sensibility. After controlling for severity of depressive symptoms in a hierarchical linear regression analysis, most associations between interoceptive sensibility and SI disappeared.ConclusionResults suggest that suicide ideators do not lack the ability to perceive their own bodily signals but they feel less able to use them in a way that is advantageous for them. Differences between suicide ideators and non-ideators appear to be largely driven by depressive symptoms (depression bias).
Highlights
Recent research suggests an association between interoceptive deficits on the one hand and suicide ideation and suicidal behavior on the other hand [1, 2]
The results reported by Rogers et al [10] suggest that differences in interoception should most likely be found between non-suicidal controls and participants with suicidal ideation, but not between participants with suicide ideation and those who attempted suicide
Participants The sample consisted of N = 95 participants, 51 of whom suffered from a Major Depressive Disorder (MDD) according to the International Classification of Diseases, 10th edition (ICD-10) [17], and 44 did not suffer from any mental disorder
Summary
Recent research suggests an association between interoceptive deficits on the one hand and suicide ideation and suicidal behavior on the other hand [1, 2]. Forkmann and Forrest et al [[2]; study I] compared interoceptive sensibility in controls, suicide ideators, suicide planners and attempters. They found that those suffering from suicide ideation or behavior reported lower interoceptive sensibility than controls. Attempters stated lower interoceptive sensibility than planners or ideators. In a second study including psychiatric outpatients, self-reported interoceptive sensibility deficits were greater among those who attempted suicide compared to those who only thought about or planned suicide [[2]; study II]. This study aimed at investigating interoceptive accuracy and sensibility in persons with and without suicide ideation (SI) while controlling for severity of depressive symptoms
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