The Prediction Model of Non-Suicidal Self-Injury in Psychiatric Patients Using Decision Tree Analysis
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Purpose: The prevalence rate of non-suicidal self-injury (NSSI) in the clinical population is higher than that in the community sample, necessitating the need to investigate the predicting factors of NSSI in this group. The present study aimed to develop a prediction model of NSSI among psychiatric patients in Korea. Materials and Methods: Decision tree analysis was conducted on a sample of 224 psychiatric patients. Emotion regulation strate gies (rumination, cognitive reappraisal, and expressive suppression), impulsivity, problematic alcohol use, working memory, de pressive mood, and gender were included in the model as predictors of NSSI. Results: Results indicated that rumination, problematic alcohol use, and working memory predicted lifetime NSSI engagement among psychiatric patients. The best predictor of lifetime NSSI engagement was rumination. Specifically, when the level of rumi nation was high, the level of working memory was lower, and the risk of NSSI was higher. In the case of low levels of rumination, the higher the level of problematic alcohol use, the higher the risk of NSSI. The highest prevalence of lifetime NSSI engagement was found in a subgroup of patients with high levels of rumination and low levels of working memory. Conclusion: The major contribution of this study is finding a combination of factors to predict the high-risk group of NSSI among psychiatric patients in Korea. This study provides evidence on the effect of rumination, working memory, and problematic alco hol use on NSSI. It is suggested that clinicians and researchers should pay more attention to emotion regulation and related vul nerabilities in preventing and treating NSSI.
Abstract
Purpose: The prevalence rate of non-suicidal self-injury (NSSI) in the clinical population is higher than that in the community sample, necessitating the need to investigate the predicting factors of NSSI in this group. The present study aimed to develop a prediction model of NSSI among psychiatric patients in Korea. Materials and Methods: Decision tree analysis was conducted on a sample of 224 psychiatric patients. Emotion regulation strate gies (rumination, cognitive reappraisal, and expressive suppression), impulsivity, problematic alcohol use, working memory, de pressive mood, and gender were included in the model as predictors of NSSI. Results: Results indicated that rumination, problematic alcohol use, and working memory predicted lifetime NSSI engagement among psychiatric patients. The best predictor of lifetime NSSI engagement was rumination. Specifically, when the level of rumi nation was high, the level of working memory was lower, and the risk of NSSI was higher. In the case of low levels of rumination, the higher the level of problematic alcohol use, the higher the risk of NSSI. The highest prevalence of lifetime NSSI engagement was found in a subgroup of patients with high levels of rumination and low levels of working memory. Conclusion: The major contribution of this study is finding a combination of factors to predict the high-risk group of NSSI among psychiatric patients in Korea. This study provides evidence on the effect of rumination, working memory, and problematic alco hol use on NSSI. It is suggested that clinicians and researchers should pay more attention to emotion regulation and related vul nerabilities in preventing and treating NSSI.
참고문헌 (58)
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