Characteristics and predictive factors of non-suicidal self-injury in patients with schizophrenia spectrum disorders

Objective: This study was designed to evaluate the characteristics and functions of non-suicidal self-injury (NSSI) in patients with schizophrenia spectrum disorders (SSD) and to investigate predictive factors of NSSI. Method: A total of 102 patients aged 18-65 years with a diagnosis of SSD according to DSM-5 criteria, who were in remission were consecutively recruited for the study. Lifetime NSSI was assessed using the Inventory of Statements About Self-injury. The Positive and Negative Syndrome Scale, the Calgary Depression Scale, the Suicide Probability Scale, the Dissociation Questionnaire, the Schedule for Assessing the Three Components of Insight, and the Barratt Impulsivity Scale-11 were administered to all of the participants. Logistic regression analysis was conducted to predict NSSI. Results: The prevalence of NSSI was 31.4% in our sample. Self cutting was the most common type (26.1%), and affect regulation was the most common function of NSSI. Among the NSSI (+) group, 65.6% preferred to be alone when performing self-injurious behavior. The time between the onset of an urge to self-injure and the onset of self-injurious behavior was most often

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