Associations between self-harm and distinct types of impulsivity
Abstract
Objective Self-harm is common and is of considerable public health concern. There is an ongoing debate regarding how self-harm should be classified. The aim of this study was to characterize associations between self-harm and impulsivity, including from the perspective of formal mental disorders and neuropsychological functioning. Method Total 333 adults (mean [SD] age 22.6 (3.6) years, 61% male) were recruited from the general community, and undertook detailed clinical and cognitive assessments. History of self-harm was quantified using the Self-Harm Inventory (SHI), which asks about 22 self-harm behaviors (classic self-harm behaviors as well as broader types of behavior that may be relevant, such as engaging in emotionally abusive relationships). Principal components analysis was used to identify latent dimensions of self-harming behaviors. Relationships between self-harm dimensions and other measures were characterized using ordinary least squares regression. Results Principal Components Analysis yielded a three factor solution, corresponding to self-injurious self-harm (e.g. cutting, overdoses, burning), interpersonal related self-harm (e.g. engaging in emotionally or sexually abusive relationships), and reckless self-harm (e.g. losing one’s job deliberately, driving recklessly, abusing alcohol). Regression modelling showed that all three dimensions of self-harm were associated with lower quality of life. Classic and interpersonal self-harm dimensions were associated…
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