Non-suicidal self-injury (functions) in eating disorders: Associations with reactive and regulative temperament

Non-suicidal self-injury among individuals with an eating disorder: A systematic review and prevalence meta-analysis

OBJECTIVE

This study aimed to quantify the prevalence of non-suicidal self-injury across eating disorders (EDs) and within diagnostic categories through systematic review and proportional, or so-called prevalence, meta-analysis.

METHOD

Included studies had to contain individuals with a verified diagnosis of an ED. The last literature search was conducted on September 11, 2023, for studies published on or before September 2023 without a restriction on earliest publication year. Results were synthesized and analyzed using the "metaprop" package in R and presented using forest plots. Bias was assessed by a Peters' regression test and funnel plot.

RESULTS

79 studies published between 1985 and 2023 were included encompassing 32,334 individuals with an ED. Importantly, 42 studies were not included in any other meta-analyses on self-injury in EDs to date. Overall prevalence of non-suicidal self-injury was 34.59% (95%CI = 30.49-38.81). Prevalence in anorexia nervosa restrictive type, binge/purge type, bulimia nervosa, binge eating disorder and other specified feeding/eating disorder were 23.19% (95%CI = 16.96-30.03%), 41.98% (95%CI = 32.35-51.91%), 36.97% (95%CI = 30.69-43.46%), 21.21% (95%CI = 14.93-28.12%) and 37.65% (95%CI = 28.59-47.09%), respectively. Prevalence estimations could not be estimated for other ED categories due to lack of a sufficient number of studies.

DISCUSSION

Non-suicidal self-injury is prevalent across both binge/purge and restrictive EDs. Considering the transdiagnostic nature of self-injurious behaviors in ED, the results highlight the importance of assessment and monitoring of self-injury in people with ED, irrespective of specific diagnoses. The method of determining self-injury varied across studies and may limit this study.

PUBLIC SIGNIFICANCE

This study highlights the prevalence of self-injury across eating disorders irrespective of diagnosis and within specific EDs. While diagnoses known to exhibit self-injurious behaviors (e.g., bulimia nervosa, anorexia nervosa binge/purge subtype) demonstrated the highest prevalence of self-injury, all diagnoses were found to have a prevalence greater than 20%. These findings suggest the importance of assessing and monitoring all individuals with an eating disorder for the presence of self-injury.

Are PID-5 personality traits and self-harm attitudes related? A study on a young adult sample pre-post COVID-19 pandemic

Introduction

Different studies confirm a stronger link between maladaptive personality traits and Non-suicidal Self-injury (NSSI). Additionally, the interest in the relationship between the experience of the COVID-19 pandemic and NSSI is growing. The present study aims (a) to investigate differences in personality traits between individuals with NSSI, suicidal ideation, NSSI and suicidal ideation co-occurrence and none; (b) to observe which personality traits predominantly influence the occurrence of self-harm acts; (c) to evaluate the difference in self-harm attitudes pre and post COVID-19 pandemic.

Method

270 (108 males and 162 females) participants aged between 18 and 25 were included in the study. Everyone participated in a clinical interview and completed an assessment consisting of the Personality Inventory for DSM-5 (PID-5) and the Health of the Nation Outcome Scales (HoNOS). A multivariate analysis of variance (MANOVA), a multiple hierarchical regression analysis, controlling for age and gender and a T-test for independent samples were conducted.

Results

The individuals with the highest levels of negative affectivity, detachment, antagonism, and psychoticism are those who simultaneously present suicidal ideation and NSSI. Moreover, age and detachment predicted higher scores in self-harm attitudes. Our results unexpectedly do not confirm an upward trend of NSSI and suicidal ideation during the pandemic period.

Limitations

The study is cross-sectional, and no causal links can be assumed; the groups involved were not homogeneous for numerosity.

Conclusions

The results testify that the study of maladaptive traits is fundamental to a greater understanding of NSSIs. Working clinically on those could potentially reduce.

Eating disorder behaviors as a form of non-suicidal self-injury

Nonsuicidal Self-Injury (NSSI), the purposeful harming of one's body tissue without suicidal intent. NSSI frequently co-occurs with other self-destructive forms of psychopathology, such as eating disorders (ED); however, it remains unclear if ED behaviors are used as a form of NSSI. This exploratory study examined the occurrence of Self-Injurious Disordered Eating Symptoms (SIDES), as well as differences in clinical correlates and treatment outcomes between NSSI patients with and without SIDES. Participants included 1,327 patients admitted for partial hospitalization or intensive outpatient treatment for NSSI (87.4% female; 75.3% Non-Hispanic White). Data were collected at admission and discharge as part of routine clinical outcome assessment. Results indicate that 29.5% of the sample engaged in SIDES, while most were not diagnosed with an ED. Patients that engaged in SIDES reported greater clinical severity at baseline, including greater general psychopathology, lower quality of life, and worse functional impairment, as well as more clinically severe NSSI (e.g., greater number of methods, higher urge to self-injure, greater intrapersonal functions). No differences in treatment outcomes were found. These findings suggest that some NSSI patients perceive ED behaviors as a form of NSSI and that SIDES may be a marker for a more severe clinical presentation.

Reinforcement sensitivity and bulimia symptoms: the role of emotion regulation

OBJECTIVE

Reinforcement Sensitivity Theory (RST) provides a theoretical foundation associated with various approach and avoidance behaviors and individual personality differences. Sensitivity to reward and punishment, two neural systems within the RST have been significantly associated with bingeing and purging behaviors. However, inconsistent findings are observed and specific factors mediating these relationships are not well understood. Deficits in emotion regulation may account for these relationships, as both negative urgency and distress tolerance have been independently associated with bulimia behaviors. Thus, this is an area that requires further investigation.

METHOD

The current study utilized various self-report inventories, including the Eating Disorder Inventory-3rd Edition to measure bulimia symptoms, as well as measures of negative affect, sensitivity to reward and punishment, distress tolerance, and negative urgency. These measures were used to assess whether distress tolerance and negative urgency mediated associations between sensitivity to reward and punishment and bulimia symptoms in a community sample of 394 young adults ranging from the ages of 18 to 25.

RESULTS

As expected, sensitivity to reward and punishment were significantly associated with decreased distress tolerance. Distress tolerance was also directly associated with greater negative urgency, which was significantly associated with increased bulimia symptoms. Consistent with hypotheses, indirect associations between sensitivity to reward and sensitivity to punishment to bulimia symptoms via distress tolerance and negative urgency were observed, controlling for gender and negative affect.

DISCUSSION

Results contribute to understanding specific contributions of risk factors within the relationship of sensitivity to reward and punishment and bulimia symptoms, measured by the EDI-3. Novel to existing literature, results indicate that reinforcement sensitivity significantly contributes to emotion regulation deficits. Thus, these findings may have important implications for understanding the development and treatment of bulimia symptoms.

LEVEL OF EVIDENCE

Level V, based on descriptive, cross-sectional data.

Psychometric properties of the persian version of the inventory of statements about self-injury (ISAS)

BACKGROUND

Non-suicidal self-injury (NSSI) is a serious public health problem prevalent among adolescents and young adults. The present study examines the factor structure, internal consistency, and validity of the Persian version of the Inventory of Statements About Self-injury (ISAS), a self-report measure designed to comprehensively assess non-suicidal self-injury (NSSI).

METHODS

A total of 655 Iranian school-attending adolescents completed study measures online, and 246 youth (37.70 %) (M age = 15.38, SD ± 0.50; 53 % female) reported a history of NSSI at least once during their lifetime.

RESULTS

Confirmatory factor analysis supported the proposed two-factor model of ISAS (i.e., Interpersonal and Intrapersonal dimensions), which were internally consistent and yielded direct associations with converging correlates (e.g., depression, anxiety, irritability, and anger).

CONCLUSIONS

Findings indicated that the Persian version of the ISAS has sound psychometric properties and is a valid and reliable self-report measure of NSSI.

Non-suicidal self-injury and bulimia: the role of emotion dysregulation and body dissatisfaction

PURPOSE

Risk factors of negative affect, body dissatisfaction, distress tolerance, and negative urgency are independently associated with bulimia symptoms and non-suicidal self-injury (NSSI). However, relationships of these risk factors within comorbid presentations are not fully understood. The current study examined specific roles of these risk factors within this relationship.

METHODS

An at-risk community sample of young adults (N = 429) completed an online survey of negative affect, body dissatisfaction, distress tolerance, negative urgency, bulimia symptoms, and NSSI.

RESULTS

A hypothesized path model was a good fit to the data. Results indicated direct paths from body dissatisfaction, negative urgency, and distress tolerance to bulimia symptoms. Negative urgency, distress tolerance, and bulimia symptoms were directly associated with NSSI. Consistent with hypotheses, distress tolerance and negative urgency acted as vulnerability factors, increasing the strength of associations between bulimia symptoms and NSSI. Distress tolerance also strengthened associations between negative urgency and NSSI. In addition to the direct effect, negative urgency was indirectly associated with NSSI via body dissatisfaction bulimia. Hypothesized indirect effects through distress tolerance were not supported.

CONCLUSIONS

Results support etiological models of bulimia and NSSI, and suggest deficits in emotion regulation strengthen risk of comorbid presentations. Furthermore, individuals with greater impulsivity and difficulty tolerating distress are at increased risk of engaging in both bulimia behaviors and NSSI, providing targets for clinical intervention.

LEVEL OF EVIDENCE

Level V, cross-sectional descriptive study.

Non-suicidal self-injury in patients with eating disorders: nuclear aspects

Background: Through the culture of thinness, increasingly promoted in our society as a beauty canon, it is not surprising that the number of people affected by eating disorders is increasing. Objective: This research aims to study the relationship between non-suicidal self-injuries and nuclear aspects of eating disorders specified along with this article. Methods: The sample consisted of 60 women diagnosed with anorexia and bulimia. Questionnaires assessing impulsivity, body satisfaction, alexithymia, body attitude and self-esteem were administered. Participants with non-suicidal self-harm were compared with those without, and participants with anorexia with and without self-harm and participants with bulimia with and without self-harm were compared. Results: Differences were found in body dissatisfaction = 5,71; p ≤ ,01), body attitudes = 4,80; p ≤ ,02), self-esteem = 14,09; p ≤ .00) and impulsivity (t = 3,39; p ≤ ,01) between participants with and without non-suicidal self-harm. Conclusions: These are key factors for the clinic in the treatment of eating disorders to prevent the presence of self-harm, as it allows focusing the treatment target on those aspects such as dissatisfaction and impulsivity, which are key in the development of self-harm.

Temperament and Character Traits of Female Eating Disorder Patients with(out) Non-Suicidal Self-Injury

Eating disorder (ED) patients show alarmingly high prevalence rates of Non-Suicidal Self-Injury (NSSI). Adolescents seem to be particularly at risk, as EDs and NSSI both have their onset in mid-adolescence. It has been suggested that personality could be a transdiagnostic mechanism underlying both EDs and NSSI. However, little attention has been given to adolescent clinical samples compared to adult and/or community samples. Therefore, the current study investigated the role of personality in a sample of 189 female inpatients with an ED (M = 15.93, SD = 0.98). Our results confirmed the high prevalence of NSSI in EDs, specifically in patients with bingeing/purging behaviours (ED-BP). Temperamental differences were found between ED-BP and the restrictive ED subtype (ED-R). Namely, ED-BP patients showed more harm avoidance and less self-directedness compared to ED-R. Temperamental differences were found in NSSI as well, regardless of ED subtype: ED patients who had engaged in NSSI during their lifetime reported less self-directedness and more harm avoidance. Interestingly, only ED patients who recently engaged in NSSI showed less novelty seeking. These temperamental profiles should be recognised as key mechanisms in the treatment of adolescent ED patients with and without NSSI.

Non-Suicidal Self-Injury and Eating Disordered Behaviors: An Update on What We Do and Do Not Know

PURPOSE OF REVIEW

The current report aims to summarize recent advances about the relationship between non-suicidal self-injury (NSSI) and eating disordered (ED) behaviors and highlights meaningful directions for future research.

RECENT FINDINGS

While there is solid evidence indicating a robust cross-sectional association between NSSI and ED behaviors, emerging evidence suggests that the temporal relationship between these behaviors may be bidirectional. Shared functions and risk factors may explain why these behaviors often co-develop. At the same time, little is still known about the psychosocial consequences of comorbid NSSI and ED engagement, and there is a lack of intervention studies that target these behaviors simultaneously. It is well-established that NSSI and ED behaviors frequently co-occur. The field should now turn to longitudinal designs to advance our understanding of the longer-term developmental and the shorter-term momentary relationship of these behaviors in daily life. Providing insight into these areas will help guide the deployment of evidence-based interventions that match the needs of clients who report comorbid NSSI and ED behaviors.

DSM-5 personality domains as correlates of non-suicidal self-injury severity in an Italian sample of adolescent inpatients with self-destructive behaviour

To evaluate the associations between DSM-5 alternative model of personality disorder dysfunctional personality domains and the clinician's ratings of non-suicidal self-injury (NSSI) severity, a sample of consecutively admitted Italian adolescent inpatients (N = 100) were administered the Italian translations of the DSM-5 Clinician Rating Scale-NSSI (CRS-NSSI), the Personality Inventory for DSM-5 (PID-5), the Structured Clinical Interview for DSM-IV Axis II Personality Disorders, Version 2.0 (SCID-II) and the Children's Depression Inventory (CDI). Bivariate association analyses showed that PID-5 negative affectivity scores and CDI total score were significantly associated with CRS-NSSI ratings. PID-5 negative affectivity score proved to be a significant predictor of the CRS-NSSI score even when the effect of the CDI total score was held constant. Our results highlighted that specific risk factors for NSSI severity may be identified even among NSSI adolescents. © 2019 John Wiley & Sons, Ltd.

Confirmatory factor analysis of the Inventory of Statements About Self-injury in a Spanish clinical sample

OBJECTIVES

The main aim of the present study was to confirm the two-factor structure of the Inventory of Statements About Self-injury- Part II (ISAS-II), analyze its psychometric properties and test-retest reliability of Parts I and II of the ISAS.

METHOD

The sample was composed of 355 Spanish participants diagnosed with eating disorders or borderline personality disorder (mean age 27.89, standard deviation = 13.31; 315 women, 40 men). Two models proposed for the ISAS-II were analyzed by means of confirmatory factorial analysis.

RESULTS

A two-factor model was confirmed, and a model with self-care included in the intrapersonal factor was preferable. The ISAS-II showed positive correlations with emotional dysregulation. Test-retest reliability showed statistically significant correlations at 7 months (n = 123).

CONCLUSION

The ISAS-II is a valid instrument to assess nonsuicidal self-injury in Spanish populations, making it possible to assess these behaviors, which require valid and reliable measures worldwide.

Temperament in Adults Who Stutter and Its Association With Stuttering Frequency and Quality-of-Life Impacts

Purpose The study aim was to determine whether self-reported temperament traits differentiate adults who stutter (AWS) from adults who do not stutter (AWNS). Additionally, associations between temperament and stuttering frequency, and between temperament and quality of life impacts of stuttering, were investigated in AWS. Method Self-reported temperament traits were documented for 33 AWS and 43 AWNS using the Adult Temperament Questionnaire (ATQ; Evans & Rothbart, 2007). Quality-of-life impacts of stuttering were assessed using the Overall Assessment of the Speaker's Experience with Stuttering (Yaruss & Quesal, 2010). Stuttering frequency was calculated from 100-word monologue and reading samples. Results A between-groups difference in scores on the ATQ Positive Affect subscale was nominally significant (i.e., before correcting for multiple tests) and also approached statistical significance after Bonferroni correction. Positive Affect scores were lower for AWS, and the size of this trending effect was moderate. Within AWS, a statistically significant positive correlation was found between impact scores on the General Information section of the Overall Assessment of the Speaker's Experience with Stuttering and ATQ Frustration subscale scores after Bonferroni correction. No associations were detected between temperament traits and stuttering frequency. Conclusions Results reveal a nontrivial tendency for AWS to experience decreased positive affect compared to AWNS. In addition, increased frustration was found to be associated with reduced general knowledge about stuttering in AWS. Neither effect has been previously reported for adults or children who stutter. Finally, self-reported temperament traits were not found to vary with stuttering frequency in adults, consistent with previous results for AWS.

High Betrayal Adolescent Sexual Abuse and Nonsuicidal Self-Injury: The Role of Depersonalization in Emerging Adults

Adolescent sexual abuse can interfere with healthy development. Sexual abuse that is perpetrated by close other(s)-high betrayal-can be additionally harmful, with sexual abuse being linked with dissociation and nonsuicidal self-injury (NSSI). Depersonalization, a dissociative subtype characterized by disconnection between oneself and one's body and/or thoughts, may further explain the role of dissociation in NSSI. The purpose of the current study was to: 1) isolate the impact of adolescent sexual abuse on NSSI; and 2) examine depersonalization as a pathway between high betrayal adolescent sexual abuse and NSSI. Participants (N = 192) were college students who completed online measures assessing sexual abuse, dissociation, and NSSI. While controlling for child sexual abuse and adult sexual abuse, adolescent sexual abuse predicted NSSI. Moreover, there was an indirect effect of high betrayal adolescent sexual abuse on NSSI through depersonalization, while controlling for child sexual abuse, adult sexual abuse, and medium betrayal (perpetrator: unclose other) adolescent sexual abuse. Findings from the current study have implications for relational cultural therapy as an evidence-informed treatment that highlights the relational harm of interpersonal trauma, while incorporating contextual elements, such as development of maladaptive coping strategies, into therapy.

Self-efficacy and emotionally dysregulated behaviour: An exploratory test of the role of emotion regulatory and behaviour-specific beliefs

We examined the relationship between self-efficacy and three behaviours that can serve similar affect-regulatory functions (self-injury, risky alcohol use, disordered eating). We proposed that general self-efficacy would be indirectly related to each outcome, operating via emotion regulatory self-efficacy and behaviour-specific self-efficacy. A path analysis confirmed this proposal in a sample of 490 university students, who completed questionnaires assessing the constructs of interest. Emotion regulatory self-efficacy was a salient predictor of self-injury and disordered eating, evidencing both direct and indirect relationships. Self-efficacy to resist each of the behaviours was uniquely related to its target behaviour. We discuss these findings, outlining the implications for a theoretical understanding of emotion-regulatory behaviours, and offer suggestions for prevention and early intervention initiatives.

Non-suicidal self-injury in patients with eating disorders: prevalence, forms, functions, and body image correlates

INTRODUCTION

More than one third of patients with eating disorders report NSSI. Moreover, negative attitudes and feelings toward the body, body dissatisfaction, and body image disturbances have been linked to NSSI in community and clinical samples. However, there is a lack of studies exploring NSSI frequency and functions and the specific relationship between multidimensional body image dimensions and NSSI in eating disorder patients.

OBJECTIVES

First, we explored the frequency, types, and functions of NSSI in a sample of 226 Spanish female participants with eating disorders (ED). Second, we explored differences in NSSI and body image depending on the ED restrictive-purgative subtype; and third, we explored differences in body dissatisfaction, body image orientation, and body investment in eating disorder patients without NSSI (n = 144), with NSSI in their lifetime (n = 19), and (b) with NSSI in the previous year (n = 63).

RESULTS

Of the overall sample, 37.1% (n = 89) had a history of self-injury during their lifetime, and 27.1% (n = 65) had self-injured in the previous year. Among the types of ongoing NSSI, the most frequent were banging (64.6%) and cutting (56.9%). Restrictive vs purgative patients differed on NSSI lifetime, Appearance Evaluation, Body Areas Satisfaction, Body Protection and Feelings and Attitudes toward the Body. Moreover, significant differences were found on Appearance Evaluation, Body Areas Satisfaction, Positive Feelings and Attitudes towards the Body, Body Protection, and Comfort with physical contact, between participants without a history of self-injury and both NSSI groups.

DISCUSSION

Body dissatisfaction and body investment have been found to be variables related to NSSI. Thus, the present study highlights the importance of working on body image in ED patients to reduce the frequency of NSSI.

Adversity, emotion regulation, and non-suicidal self-injury in eating disorders

The comorbidity between non-suicidal self-injury and eating disorder behaviors suggests that psychosocial factors may play a role in both types of behaviors. This study aimed to assess the presence of non-suicidal self-injury in 66 eating disorder patients and to analyze the associations among adversity, emotion regulation, non-suicidal self-injury, and disordered eating behavior. A total of 24 participants (36.4%) reported non-suicidal self-injury. Patients endorsing self-injury had a higher severity of disordered eating behavior. More difficulties in emotion regulation and a greater number of methods of non-suicidal self-injury were associated with a higher severity of eating pathology. Clinicians should consider these relationships in the assessment and treatment of eating disorders.

Correlates of Non-suicidal Self-Injury and Suicide Attempts in Bulimic Spectrum Disorders

Objective: The aim of this study was to examine the implication of personality, impulsivity, and emotion regulation difficulties in patients with a bulimic-spectrum disorder (BSD) and suicide attempts (SA), BSD patients with non-suicidal self-injury (NSSI), and BSD patients without these behaviors.

Method: One hundred and twenty-two female adult BSD patients were assessed using self-report questionnaires. Patients were clustered post-hoc into three groups depending on whether they presented BSD without NSSI or SA (BSD), BSD with lifetime NSSI (BSD + NSSI) or BSD with lifetime SA (BSD + SA).

Results: The BSD + NSSI and BSD + SA groups presented more emotion regulation difficulties, more eating and general psychopathology, and increased reward dependence in comparison with the BSD group. In addition, BSD + SA patients specifically showed problems with impulse control, while also presenting higher impulsivity than both the BSD and BSD + NSSI groups. No differences in impulsivity between the BSD and BSD + NSSI groups were found.

Conclusions: The results show that BSD + NSSI and BSD + SA share a common profile characterized by difficulties in emotion regulation and low reward dependence, but differ in impulsivity and cooperativeness. This suggests that self-injury, in patients without a history of suicide attempts (i.e., BSD + NSSI), may have a regulatory role rather than being due to impulsivity.

Non-Suicidal Self-Injury Among Dutch and Belgian Adolescents: Personality, Stress and Coping

Background

This study examines: (1) the prevalence of Non-Suicidal Self-Injury (NSSI) among Dutch and Belgian adolescents, (2) the associations between Big Five personality traits and NSSI engagement/versatility (i.e., number of NSSI methods), and (3) whether these associations are mediated by perceived stress and coping.

Methods

A total of 946 Flemish (46%) and Dutch (54%) non-institutionalized adolescents (Mean age = 15.52; SD = 1.34, 44% females) were surveyed. Measures included the NSSI subscale of the Self-Harm-Inventory, the Dutch Quick Big Five Personality questionnaire, the Perceived Stress Scale and the Utrecht Coping List for Adolescents. Examination of zero-order correlations was used to reveal associations, and hierarchical regression analysis was used to reveal potential mediators which were further examined within parallel mediation models by using a bootstrapping-corrected procedure.

Results

Lifetime prevalence of NSSI was 24.31%. Neuroticism; perceived stress; and distractive, avoidant, depressive, and emotional coping were positively associated with NSSI engagement, whereas Agreeableness, Conscientiousness; and active, social, and optimistic coping were negatively associated with NSSI engagement. Observed relationships between personality traits and NSSI engagement were consistently explained by perceived stress and depressive coping. A higher versatility of NSSI was not associated with any Big Five personality trait, but was associated with higher scores on perceived stress and depressive coping and with lower scores on active and optimistic coping.

Conclusion

Our study suggests that a specific personality constellation is associated with NSSI engagement via high stress levels and a typical depressive reaction pattern to handle stressful life events.

The relationship of psychological trauma and dissociative and posttraumatic stress disorders to nonsuicidal self-injury and suicidality: a review

We reviewed research on the relationship between (a) exposure to psychological trauma and (b) nonsuicidal self-injury (NSSI) and suicidality (suicidal ideation [SI] and suicide attempts [SA]) in individuals with dissociative disorders and posttraumatic stress disorder (PTSD). The review provides a context for the special issue of the Journal of Trauma & Dissociation on these topics. Exposure to childhood sexual abuse is the most consistent traumatic antecedent of self-harm, although traumatic violence in childhood (particularly physical abuse) and adulthood (particularly domestic violence) and exposure to multiple types of traumatic stressors also are associated with NSSI and SI/SA. Dissociative disorders and PTSD are consistently associated with increased NSSI and SA/SI. There is preliminary cross-sectional evidence that dissociation and posttraumatic stress disorders may mediate the relationship between psychological trauma and NSSI and SI/SA. Research on emotion dysregulation as a potential cross-cutting mechanism linking dissociation, PTSD, and self-harm is also reviewed. We conclude with a discussion of implications for clinical practice and future directions for scientific research.