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Group mindfulness based cognitive therapy vs group support for self-injury among young people: study protocol for a randomised controlled trial

  • Clare S. Rees1Email author,
  • Penelope Hasking1,
  • Lauren J. Breen1,
  • Ottmar V. Lipp1 and
  • Cyril Mamotte2
BMC Psychiatry201515:154

DOI: 10.1186/s12888-015-0527-5

Received: 16 January 2015

Accepted: 12 June 2015

Published: 8 July 2015

Abstract

Background

Non-suicidal self-injury (NSSI) is a transdiagnostic behaviour that can be difficult to treat; to date no evidence based treatment for NSSI exists. Mindfulness Based Cognitive Therapy (MBCT) specifically targets the mechanisms thought to initiate and maintain NSSI, and thus appears a viable treatment option. The aims of the current study are to test the ability of MBCT to reduce the frequency and medical severity of NSSI, and explore the mechanisms by which MBCT exerts its effect.

Methods/Design

We will conduct a parallel group randomised controlled trial of Mindfulness Based Cognitive Therapy (MBCT) versus Supportive Therapy (ST) in young people aged 18–25 years. Computerised block randomisation will be used to allocate participants to groups. All participants will meet the proposed DSM-5 criteria for NSSI (i.e. five episodes in the last twelve months). Participants will be excluded if they: 1) are currently receiving psychological treatment, 2) have attempted suicide in the previous 12 months, 3) exhibit acute psychosis, 4) have a diagnosis of borderline personality disorder, or 5) have prior experience of MBCT. Our primary outcome is the frequency and medical severity of NSSI. As secondary outcomes we will assess changes in rumination, mindfulness, emotion regulation, distress tolerance, stress, and attentional bias, and test these as mechanisms of change.

Discussion

This is the first randomised controlled trial to test the efficacy of MBCT in reducing NSSI. Evidence of the efficacy of MBCT for self-injury will allow provision of a brief intervention for self-injury that can be implemented as a stand-alone treatment or integrated with existing treatments for psychiatric disorders.

Trial registration

Australian New Zealand Clinical Trials Registry Number ACTRN12615000023550. Registered 16 January 2015.

Keywords

Non-suicidal self-injury Mindfulness based cognitive therapy Randomised controlled trial

Background

Non-suicidal self-injury (NSSI), the deliberate destruction or alteration of body tissue without conscious suicidal intent and for purposes not socially sanctioned [1], is a transdiagnostic behaviour that is used to cope with intense emotions and psychological distress. Equally common among males and females, NSSI can include cutting, burning or carving the skin and hitting or banging the self or hard objects. Although typically emerging in adolescence, NSSI is most prevalent among 18–24 year olds (20 % lifetime history) [2]. NSSI differs from suicidal behaviour (including ideation and attempts) in being more prevalent, engaged in more frequently, typically involving non-lethal methods, and being driven by emotion regulation rather than a desire to end life. As such the aetiology of NSSI is markedly distinct from suicidal behaviour, necessitating a tailored treatment approach [3, 4].

In Australia, the direct hospital costs of non-suicidal self-injury are estimated at over $14 million per month [2]. Among 15–24 year olds, 7301 were hospitalised for self-harm (including suicidal behaviour) in 2009–2010, placing the direct cost in this age group alone at almost $34 million per year [5]. With increased awareness and efforts to improve help-seeking [6], these costs are set to rise dramatically unless effective interventions to minimise the frequency and medical severity of the behaviour are made available. Young people who self-injure carry a fourfold risk of suicidal thoughts and behaviours within the following year [7], and Australians who self-injure are 42 times more likely to attempt suicide [2]. Reducing the major risk factor of self-injury is crucial to suicide prevention efforts yet there is no targeted evidence-based treatment for self-injury.

Growing recognition of the prevalence and impact of NSSI has led to its inclusion in Section 3 of the latest edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM) [8], as a condition for further study. Proposed criteria include: NSSI on five or more days in the past year, for the purpose of relief from negative feelings, resolving interpersonal difficulties or to induce a positive state (e.g. euphoria). NSSI is defined as being associated with negative thoughts and feelings, premeditation and rumination. The proposed criteria evidence discriminant validity [911].

Commensurate with the affect-regulatory function of NSSI, mechanisms thought to increase risk of NSSI in the face of stress include poor emotion regulation, poor distress tolerance and rumination on negative thoughts and feelings. Emotional cascade theory proposes that through rumination even minute emotional stimuli become amplified over time [12] and, in the absence of adaptive emotion regulatory strategies, individuals self-injure to escape the subsequent cascades of intense emotion. Supporting this, researchers consistently demonstrate increased arousal and rumination prior to NSSI [13, 14], higher physiological reactivity and poor distress tolerance when under stress [15], and emotional relief and reduced arousal after NSSI [16].

Treatment for NSSI

Despite the adverse outcomes for people who engage in NSSI, there is no empirically validated treatment available [17]. Where NSSI is an outcome variable of interest in clinical trials, treatment has been exclusively designed for people with Borderline Personality Disorder (BPD) [1820]. Given the transdiagnostic nature of NSSI, treatments that address NSSI beyond BPD are essential. Mindfulness-Based Cognitive Therapy (MBCT) was designed specifically to impact on attention to negative thoughts and images, emotion regulation, distress tolerance and rumination [21, 22], and successfully evidences reductions in emotional reactivity [23]. That this treatment directly addresses proposed diagnostic features of NSSI, and core mechanisms repeatedly implicated in NSSI [8], offers immense promise for MBCT as a treatment for NSSI. Yet, despite recent work implicating a lack of mindfulness in the maintenance of NSSI [24], no prior research has explored the ability of MBCT to impact the frequency and medical severity of NSSI. Garnering support for MBCT as a viable and efficacious treatment is essential to the on-going effort to reduce the impact and burden of NSSI.

If, as theorised, MBCT exerts its effect by minimising attention on negative thoughts and rumination, improving distress tolerance and emotion regulation, and reducing perceived and physiological stress responses, changes in these variables should be evident upon completion of an MBCT program, with subsequent improvement in NSSI. Assessing mechanisms of change is crucial to determining the ‘active ingredient’ in MBCT, facilitating optimal outcomes and tailored treatment approaches [25].

The current study

In this study we aim to: 1) determine the efficacy of group Mindfulness Based Cognitive Therapy (MBCT) in decreasing the frequency and medical severity of Non-Suicidal Self-Injury (NSSI) among young people, relative to group Supportive Therapy (ST); and 2) establish the mechanisms by which MBCT reduces frequency and severity of NSSI. The following hypotheses are proposed:
  1. 1.

    We expect MBCT to reduce the frequency and medical severity of NSSI, relative to ST and this reduction to be maintained at 3 month and 6 month follow-up

     
  2. 2.

    We expect MBCT to increase mindfulness, reduce rumination, improve emotion regulation, improve distress tolerance, reduce bias for negative stimuli, and reduce stress (self-reported and physiological, based on cortisol)

     
  3. 3.
    We expect the proposed mechanisms of action will mediate the relationship between assigned treatment group and outcomes of reduced NSSI, lower scores on the Beck Anxiety Inventory, and lower scores on the Beck Depression Inventory-II (Fig. 1).
    Fig. 1

    Hypothesised model

     

Methods/Design

Study design

We will conduct a parallel group randomised controlled design in which half our participants receive Group Mindfulness Based Cognitive Therapy and half receive Group Supportive Therapy. We will implement a computerised block randomisation procedure to ensure equal distribution of participants across conditions (Fig. 2). As far as practically possible participants will be blind to group allocation. Self-report, behavioural and physiological measures will be administered at pre-treatment, mid-treatment, post-treatment, and 3 and 6-month follow-up. To maximise external validity, a minimum follow-up period of 6 months is recommended and will be adopted in the present study [26]. Baseline assessments and follow up assessments will be conducted by a researcher blind to group allocation.
Fig. 2

CONSORT flow diagram of participant allocation

Participants and recruitment

We will recruit 96 participants (48 per group) via our existing referral networks of GPs, mental health professionals, and university counselling services, as well as through advertising in print media and social network sites. Inclusion criteria include: 1) Aged 18–25 years, and 2) meet proposed DSM-5 criteria for NSSI [8]. Participants will be excluded if they: 1) are currently receiving psychological treatment, 2) have attempted suicide in the previous 12 months, 3) exhibit acute psychosis, 4) have a diagnosis of borderline personality disorder (BPD), or 5) have prior experience of MBCT. As NSSI is one diagnostic criterion for BPD, young people diagnosed with BPD will be excluded to avoid confounding diagnosis and behaviour. Individuals presenting with suicidal behaviour, psychosis or BPD will be appropriately referred.

Intervention

A trained psychologist will conduct telephone interviews to assess eligibility with the single-item Clinician-Rated Severity of Non-Suicidal Self-Injury [27] and 6-item Mini International Psychiatric Interview [28]. Both treatment conditions will comprise 8 weekly group sessions of 2 h duration with up to 12 participants in each group. All group sessions and assessments will occur at the Curtin University Psychology Clinic. As per standard practice, two trained therapists, blind to the results of baseline and follow-up assessments, will facilitate each group. Suicidality will be monitored weekly throughout treatment (both conditions) using the 3-item Self-Monitoring Suicide Ideation Scale [29].

To ensure treatment fidelity, each therapist will receive training and weekly supervision. All treatment groups will be audiotaped with 10 % checked to ensure adherence to manualised treatment protocols, using the Mindfulness Based Cognitive Therapy Adherence Scale for MBCT group [30]. At the first treatment session all participants will complete the 6-item Credibility/Expectancy Questionnaire [31] to assess treatment face validity. We will assess treatment acceptability using Dear et al’s [32] 4-item acceptability rating scale. Upon completion of treatment, participants will also provide open comments about acceptability, and specify intended NSSI prevention strategies.

Mindfulness-based cognitive therapy (MBCT)

We will utilise the standard MBCT treatment protocol [21]. Each session combines key elements of cognitive therapy with training in mindfulness meditation. Participants are taught skills designed to foster present moment awareness which include practising mindfulness meditation, body scan, mindful walking and stretching. Cognitive therapy techniques include education about the role of negative thoughts and how rumination, avoidance, suppression, and struggling with unhelpful cognitions and emotions can perpetuate distress rather than resolve it. Participants learn to identify patterns of emotional response and negative thinking that act as warning signals for NSSI and help one another to develop crisis plans and actions to take in the event of future NSSI urges.

Supportive therapy (ST)

Supportive therapy is a widely used active control condition in psychotherapy outcome studies, as it controls for both the non-specific effects of any psychological intervention (i.e. therapeutic relationship) and the unique aspects of group therapy (i.e. social support). Additionally, from an ethical perspective, the group support condition ensures that no participants are left without an intervention. We will use Borkovec and Costello’s [33] manualised protocol. In ST, the therapist provides empathy, fosters a supportive environment, and facilitates discussions among group members around NSSI and other life issues. No MBCT techniques are taught by the therapist.

Ethical issues

After initial telephone screening to assess eligibility, during which participants are verbally informed of the study requirements, all participants will be provided with a detailed information sheet which outlines the aims and participation requirements of the study, informs participants of the confidential and voluntary nature of participation, and outlines how data are to be collected, used and stored in accordance with relevant Privacy Legislation. All participants will be afforded the opportunity to ask questions about the study and will provide signed consent to participate in the research project. Participants are free to withdraw from the research project at any time.

There is some concern regarding the potential for social contagion when discussing NSSI in a group setting. Our experience and a growing evidence base, suggests that when appropriately addressed, iatrogenic effects are rarely observed [34]. Conversely, research indicates that participants benefit from being asked about their NSSI [35, 36]. We will minimise risk of iatrogenic effects by following established guidelines to reduce social contagion [37], including discouraging sharing of explicit details, NSSI images or scars in the group setting. This conduct of this trial has been approved by the Curtin University Human Research Ethics Committee (Ref number: 4884).

Clinical outcome measures

Self-injury monitoring diary:

Participants will complete the Self-Injury Monitoring Diary, developed for this study, across the course of the trial, to assess ongoing frequency and medical severity of NSSI. Each day participants will indicate whether they had an urge to self-injure, the strength of this urge, whether they did self-injure, and the severity of the injury.

Clinician-rated severity of Non-suicidal self-injury

[27]: This single item scale assesses the severity of NSSI on a scale of 0 = None; 1 = Sub-threshold; 2 = Mild; 3 = Moderate; and 4 = Severe. The measure was designed to capture clinically meaningful changes in NSSI severity, based on the proposed DSM-5 criteria [8]. Therapists will rate each participant at the end of each therapeutic session.

Beck depression inventory

- 2nd Edition [38] (BDI-II): The BDI-II is a 21-item measures of depressive symptoms, each rated on a four-point scale. Both a continuous measure indicating severity of symptoms, and clinically meaningful cut-off scores can be obtained. The BDI-II is the gold-standard questionnaire assessment of depression and demonstrates acceptability as a screening tool in both healthy and clinical populations [39, 40].

Beck anxiety inventory

[41] (BAI): The BAI is a 21-item assessment of anxiety symptoms experienced in the last week, with each symptom rated on a four-point scale. Both cognitive and somatic symptoms are assessed. As the gold standard questionnaire assessment of anxiety, the BAI demonstrates excellent psychometric properties [41].

Mechanism of change measures

Cognitive and affective mindfulness scale - revised

[42] (CAMS-R): The CAMS-R is a brief (12 item) self-report measure designed to assess the capacity an individual has to be mindful. The measure demonstrates internal consistence and convergent validity with similar measures when administered to university students [42].

Ruminative thought style questionnaire

[43] (RTSQ): The RTSQ is a 20-item measure describing positive, negative and neutral facets of global rumination (e.g., “I can’t stop thinking about some things” or “I have never been able to distract myself from unwanted thoughts”). Respondents rate each statement on a 7-point Likert scale (1 = not at all descriptive of me, 7 = describes me very well). The RTSQ has demonstrated good convergent validity with the Response Style Questionnaire, the Global Rumination Scale and the Beck Depression Inventory, adequate test-retest reliability and high internal consistency [43].

Difficulty in emotion regulation scale

[44] (DERS): The DERS uses 36 items to tap into 5 aspects of emotion regulation: non-acceptance of emotional response, difficulty in goal directed behaviour, impulse control, emotional awareness, lack of emotion regulation strategies and emotional clarity. Participants respond to each item on a 5-point scale. The measure demonstrates acceptable reliability in university students as well as content and convergent validity [44].

Distress tolerance scale

[45]: This 14 item self-report measure assesses an individual’s ability to withstand feeling distressed. The scale assesses an individual’s ability to tolerate emotions, their appraisal of emotional situations, how absorbed they are by negative emotion and emotion regulation using 5-point Likert scales.

Perceived stress scale

[46]: The Perceived Stress Scale is a 10-item assessment designed to provide a global assessment of perceived stress. Items assess how unpredictable, controllable and overloaded individuals find their lives, without reference to specific events. The scale evidences discriminant validity with depression, and internal consistency [46].

Cortisol measurement:

Both cortisol awaking response (CAR) and daily slope (DS) will be assessed to obtain total daily cortisol output. Cortisol is a biomarker of stress and anxiety [47], and varies in response to stress among people who self-injure [48, 49]. Following best practice [50] we will collect saliva on two consecutive days at each data collection point. On each of these days, participants will collect saliva upon waking, 30 and 45 min after waking (CAR) and again at 4, 9, and 13 h after waking (DS). To increase adherence to the protocol participants who comply with at least 80 % of saliva collection will receive a $50 iTunes voucher. Participants will use Sarstedt Cortisol Salivettes® to collect saliva, which provides an easy and hygienic collection method, further encouraging compliance. Saliva is obtained by chewing on a synthetic swab which is then placed in the container for safe transportation to the laboratory for analysis. Importantly, the Salivettes® are designed to allow reliable analysis from small saliva volumes and low cortisol levels. Following collection, we will recover the saliva from the Salivettes®, centrifuge and store in aliquots at −80 °C until analysis using an enzyme-linked immunosorbent assay (ELISA). Participants will record waking time and all sampling times, and bring their clearly labelled samples to the subsequent assessment session in the clinic.

Attentional bias

The differential allocation of attention to emotional stimuli can be assessed in simple reaction time tasks that are presented using a computer. One of these tasks is the so called ‘dot probe’, which assesses the effect of emotional cues on the detection or identification of a probe stimulus [51]. In this task, two pictures or two words that differ in emotional valence (cues; pleasant and neutral or unpleasant and neutral) are presented simultaneously for a short period of time in different locations on a computer screen, left and right half or upper and lower half. After 500 ms, a probe stimulus is presented in the location that was previously occupied by one of the cues. The probe used in our task are two dots either arranged horizontally ‘..’ or vertically ‘:’. The participant’s task is to indicate the arrangement of the dots by pressing one of two buttons. Participants will be faster to respond to the probe if their focus of attention is at the location at which the probe is presented. If participants are faster to respond to probes that replace unpleasant cues, we conclude that attention is biased towards the unpleasant stimuli indicating preferential processing. If participants are faster to respond to probes that replace neutral cues, we conclude that attention is biased away from unpleasant stimuli indicating avoidance. Pleasant stimuli are included to assess whether the differential allocation of attention is driven by cue valence (differs for pleasant and unpleasant cues relative to neutral cues) or emotional arousal (is similar for pleasant and unpleasant cues relative to neutral cues).

Cues will be pictures (neutral, pleasant, unpleasant, NSSI related) drawn from the standardised International Affective Picture System [52] and normed words (neutral, pleasant, unpleasant, NSSI related) [53]. Cue location will be counterbalanced (e.g. pleasant cues will appear equally often in each possible location) as will be relation of probe to cue (i.e., the probe will follow an emotional cue equally often than a neutral cue - so cues are not predictive of probe position). This results in 24 different stimulus configurations (trials) for a fully counterbalanced design (3 × 2 × 2 × 2; cue valence [pleasant, unpleasant, NSSI related] x cue location [top vs. bottom/left vs right] x probe location [emotional, neutral] x stimulus material [words, pictures]). These 24 stimulus configurations will be repeated 10 times in a random order yielding a total of 240 trials. Including practise trials, this procedure will take approximately 10 min.

Sample size calculation and statistical analysis

We will perform both Intention to Treat and Per Protocol analyses. We will conduct a sensitivity analysis [54], and compare complete cases versus cases lost to follow-up on baseline characteristics and scores on clinical measures, by randomization group [55]. Mixed Model Repeated Measures analyses will compare results on outcome measures across conditions and time points, while controlling for random effects (e.g. age, gender). Using medium effect sizes [56] 40 per group are required for power = .80 and α = .05 (G*Power) [57]. Recruiting an additional 20 % (n = 48 per group) will allow for typical dropout [58, 59]. Mechanisms of action (see Fig. 1), will be tested using multiple mediational analysis with 1000 bias-corrected bootstrap samples in MPlus, to test total and specific indirect effects. This powerful test of mediation requires a sample of 71 participants to detect a medium effect [60]. Participants will be classified into outcome categories (Recovered, Improved, Unchanged, Deteriorated) [61] according to Reliable Change Index and Clinical Significance of change at post-treatment and follow-up, to determine whether MBCT and ST differ in clinically significant reductions in NSSI and associated symptoms of anxiety and depression over time.

Discussion

Although delineated from suicidal behaviour by definition, people who repeatedly self-injure carry a fourfold risk of suicidal thoughts and behaviours within the following year [7], and are 42 times more likely to attempt suicide [2]. Of note, NSSI increases risk of suicidal behaviour over and above risk conferred by comorbid psychopathology, adverse life events and psychosocial risk factors [7, 62]. To reduce the physical, psychological, social and economic burden of self-injury, effective interventions are urgently needed [63]. MBCT is a transdiagnostic intervention that has established evidence in the treatment of many clinical conditions. Importantly, MBCT was designed specifically to focus on the very mechanisms thought to maintain self-injury (i.e. rumination, focus on negative thoughts, poor emotion regulation). MBCT thus offers untapped potential for reducing the frequency and medical severity of self-injury.

This trial offers significant advantages over previous efforts to determine effective treatments for NSSI. First, the components of MBCT directly align with cognitive and emotional factors related to NSSI, thus offering the best chance of targeting the key mechanisms maintaining the behaviour. Second, we will collect both self-report and clinician ratings of NSSI severity through the course of the project. These will be supplemented with behavioural measures of attentional bias and analysis of cortisol as a physiological measure of stress. These objective measures significantly strengthen the scientific rigour of the findings. Third, the active comparison condition allows additional control over the influence of group processes, therefore allowing a direct test of the specific intervention mechanism of MBCT.

While the proposed sample size is small, the repeated measures design ensures our study is sufficiently powered to identify medium effects on our primary outcome variable, and provide preliminary assessment of the mechanisms of change. Restricting our sample to 18–25 years necessarily will limit generalisation of the findings to other age groups, however given this is the age at which NSSI is most common [2] it seems the appropriate age range to first test the efficacy of MBCT in reducing this behaviour.

By directly addressing the mechanisms maintaining self-injury irrespective of psychiatric diagnosis, group mindfulness-based cognitive therapy (MBCT) offers great promise as a transdiagnostic treatment that can be a successful intervention for a greater number of young people who self-injure. Establishing efficacy of MBCT for self-injury will provide the first targeted evidence-based treatment, giving therapists the power to intervene confidently and produce positive outcomes for youth who self-injure [64]. Outcomes of this project will significantly improve the care given to those who self-injure, improve their well-being, decrease their chances of further self-injury, and decrease the chance they will die by suicide.

Abbreviations

CAR: 

Cortisol awaking response

DS: 

Daily slope

DSM: 

Diagnostic and statistical manual of mental disorders

MBCT: 

Mindfulness based cognitive therapy

NSSI: 

Non-suicidal self-injury

ST: 

Supportive therapy

Declarations

Acknowledgements

This trial is funded by Australian Rotary Health.

Funding

This project is supported by a grant from Australian Rotary Health.

Authors’ Affiliations

(1)
School of Psychology and Speech Pathology, Curtin University
(2)
School of Biomedical Science, Curtin University

References

  1. Nock MK. Why do people hurt themselves? New insights into the nature and functions of self-injury. Curr Dir Psychol Sci. 2009;18:78–83.View ArticlePubMedPubMed CentralGoogle Scholar
  2. Martin G, Swannell S, Harrison J, Hazell P, Taylor A. The Australian national epidemiological study of self-injury (ANESSI). Brisbane, Australia: Center for Suicide Prevention Studies; 2010.Google Scholar
  3. Hasking PA, Coric SJ, Swannell S, Martin G, Thompson HK, Frost ADJ. Emotion regulation and coping as moderators in the relationship between personality and self-injury. J Adolescence. 2010;3:767–73.View ArticleGoogle Scholar
  4. Wilkinson P, Goodyer I. Non-suicidal self-injury. Eur Child Adoles Psychiatry. 2013;22: Supp 1, S75-79Google Scholar
  5. Tovell A, McKenna K, Bradley C, Pointe S. Hospital separations due to injury and poisoning, Australia 2009–10. Injury research and statistics series no. 69. Cat. no. INJCAT 145. AIHW.: Canberra; 2012.Google Scholar
  6. Muehlenkamp JJ, Walsh BW, McDade M. Preventing non-suicidal self-injury in schools: The Signs of Self-Injury program. J Youth Adolescence. 2010;39:306–14.View ArticleGoogle Scholar
  7. Whitlock J, Muehlenkamp J, Eckenrode J, Purington A, Baral Abrams G, Barreira P, et al. Nonsuicidal self-injury as a gateway to suicide in young adults. J Adolescent Health. 2013;52:486–92.View ArticleGoogle Scholar
  8. American Psychiatric Association. Diagnostic and statistical manual of mental disorders. 5th ed. Arlington, VA: American Psychiatric Publishing; 2013.View ArticleGoogle Scholar
  9. Lengel GJ, Mullins-Sweatt SN. Nonsuicidal self-injury disorder: Clinician and expert ratings. Psychiat Res. 2013;210:940–4.View ArticleGoogle Scholar
  10. Glenn CR, Klonsky ED. Nonsuicidal self-injury disorder: An empirical investigation is adolescent psychiatric patients. J Clin Child Adolesc Psychol. 2013;42:496–507.View ArticlePubMedPubMed CentralGoogle Scholar
  11. In-AlbonT, Ruf C, Schmid M. Proposed diagnostic criteria for the DSM-5 of Nonsuicidal Self-Injury in female adolescents: Diagnostic and clinical correlates. Psychiatry J. 2013;2013:159208.Google Scholar
  12. Selby EA, Joiner TE, Cascades of emotion. The emergence of borderline personality disorder from emotional and behavioral dysregulation. Rev Gen Psychol. 2009;13:219–29.View ArticlePubMedPubMed CentralGoogle Scholar
  13. Armey MF, Crowther JH, Miller IW. Changes in ecological momentary assessment reported affect associated with episodes of non-suicidal self-injury. Behav Ther. 2011;42:579–88.View ArticlePubMedGoogle Scholar
  14. Voon D, Hasking P, Martin G. The roles of emotion regulation and ruminative thoughts in non-suicidal self-injury. Brit J Clin Psychol. 2014;53:95–113.View ArticleGoogle Scholar
  15. Nock MK, Mendes WB. Physiological arousal, distress tolerance, and social problem-solving deficits among adolescent self-injurers. J Consult Clin Psych. 2008;76:28–38.View ArticleGoogle Scholar
  16. Franklin JC, Hessel ET, Aaron RV, Arthur MS, Helibron N, Prinstein MJ. The functions of non-suicidal self-injury: Support for cognitive-affective regulation and opponent processes from a novel psychophysiological paradigm. J Abnorm Psychol. 2010;119:850–62.View ArticlePubMedPubMed CentralGoogle Scholar
  17. Glenn CR, Franklin JC, Nock MK. Evidence-based psychosocial treatments for self-injurious thoughts and behaviors in youth. J Clin Child Adoelsc Psychol (in press).Google Scholar
  18. Gratz KL, Dixon-Gordon KL, Tull MT. Predictors of treatment response to an adjunctive emotion regulation group therapy for deliberate self-harm among women with borderline personality disorder. Personality Disorders: Theory, Research, and Treatment. 2014;5:97–107.View ArticleGoogle Scholar
  19. Linehan MM, Comtois KA, Murray AM, Brown MZ, Gallop RJ, Heard HL, et al. Two-year randomized controlled trial and follow-up of Dialectical Behavior Therapy vs Therapy by Experts for suicidal behaviors and borderline personality disorder. Arch Gen Psychiat. 2006;63:757–66.View ArticlePubMedGoogle Scholar
  20. Meaney-Tavares R, Hasking P. Coping and regulating emotions: A pilot study of a modified Dialectical Behavior Therapy group delivered in a college counseling service. J Am Coll Health. 2013;61:303–9.View ArticlePubMedGoogle Scholar
  21. Craigie MA, Rees CS, Marsh A, Nathan PR. Mindfulness-based cognitive therapy for generalised anxiety disorder: A preliminary evaluation. Behav Cogn Psychoth. 2008;36:553–68.View ArticleGoogle Scholar
  22. Segal ZV, Williams JMG, Teasdale JD. Mindfulness-based cognitive therapy for depression: A new approach to preventing relapse. New York: Guilford Press; 2002.Google Scholar
  23. Britton WB, Shaha B, Szepsenwol O, Jacobs WJ. Mindfulness-based cognitive therapy improves emotional reactivity to social stress: results from a randomized controlled trial. Behav Ther. 2012;43:365–80.View ArticlePubMedGoogle Scholar
  24. Kok R, Kirsten DK, Botha KFH. Exploring mindfulness in self-injuring adolescents in a psychiatric setting. J Psychol Afr. 2011;21:185–96.Google Scholar
  25. Kazdin AE. Mediators and mechanisms of change in psychotherapy research. Annu Rev Clin Psycho. 2007;3:1–27.View ArticleGoogle Scholar
  26. American Psychiatric Association. Clinician-rated severity of non-suicidal self-injury. Arlington, VA: American Psychiatric Publishing; 2013.Google Scholar
  27. Segal ZV, Teasdale JD, Williams JMG, Gemar MC. The mindfulness-based cognitive therapy adherence scale: Inter-rater reliability, adherence to protocol and treatment distinctiveness. Clin Psychol Psychot. 2002;9:131–8.View ArticleGoogle Scholar
  28. Borkovec TD, Costello E. Efficacy of applied relaxation and cognitive-behavioral therapy in the treatment of generalized anxiety disorder. J Consult Clin Psych. 1993;61:611–9.View ArticleGoogle Scholar
  29. Devilly G, Borkovec TD. Psychometric properties of the credibility/expectancy questionnaire. J Behav Ther Exp Psy. 2000;31:73–86.View ArticleGoogle Scholar
  30. Lecrubier Y, Sheehan D, Weiller E, Amorim P, Bonora I, Sheehan K, et al. The M.I.N.I. International Neuropsychiatric Interview (M.I.N.I.) A short diagnostic structured interview: Reliability and validity according to the CIDI. Eur Psychiat. 1997;12:224–31.View ArticleGoogle Scholar
  31. Clum G, Curtin L. Validity and reactivity of a system of self-monitoring suicide ideation. J Psychopath Behav. 1993;15:375–85.View ArticleGoogle Scholar
  32. Rothwell PM. External validity of randomized controlled trials: “To whom do the results of this trial apply?”. Lancet. 2005;365:82–93.View ArticlePubMedGoogle Scholar
  33. Dear BF, Zou JB, Titov N, Lorian C, Johnston L, Spence J, et al. Brief internet-delivered cognitive behavioural therapy for depression: A feasability open trial for older adults. Aust NZ J Psychiat. 2013;47:169–76.View ArticleGoogle Scholar
  34. Jarvi S, Jackson B, Swenson L, Crawford H. The impact of social contagion on non-suicidal self-injury: A review of the literature. Arch Suicide Res. 2013;17:1–19.View ArticlePubMedGoogle Scholar
  35. Gould MS, Marrocco FA, Kleinman M, Thomas JG, Mostkoff K, Cote J, et al. Evaluating iatrogenic effects of youth suicide screening programs: A randomized control trial. JAMA. 2005;293:1635–43.View ArticlePubMedGoogle Scholar
  36. Muehlenkamp J.J., Swenson LP, Batejan KL, Jarvi SM. Emotional and behavioral effects of participating in an online study of non-suicidal self-injury: An experimental analysis. Clinical Psychological Science (in press).Google Scholar
  37. Toste JR, Heath NL. School response to non-suicidal self-injury. Prevention Researcher. 2010;17:14–7.Google Scholar
  38. Beck AT, Steer RA, Brown GK. Manual for the Beck Depression Inventory-II. San Antonio, TX: Psychological Corporation; 1996.Google Scholar
  39. Kjaegaard M, Wang CEA, Waterloo K, Jorde R. A study of the psychometric properties of the Beck Depression Inventory-II, Montgomery and Åsberg Depression Rating Scale, and the Hospital Anxiety and Depression Scale in a sample from a healthy population. Scand J Psychol. 2014;55:83–9.View ArticleGoogle Scholar
  40. Arnau RC, Meagher MW, Norris MP, Bramson R. Psychometric evaluation of the Beck Depression Inventory-II with primary care medical patients. Health Psychol. 2001;20:112–9.View ArticlePubMedGoogle Scholar
  41. Beck AT, Epstein N, Brown G, Steer RA. An inventory for measuring clinical anxiety: Psychometric properties. J Consult Clin Psych. 1988;56:893–7.View ArticleGoogle Scholar
  42. Feldman G, Hayes A, Kumar S, Greeson J, Laurenceau J. Mindfulness and emotion regulation: The development and initial validation of the Cognitive and Affective Mindfulness Scale-Revised. J Psychopath Behav. 2007;29:177–90.View ArticleGoogle Scholar
  43. Brinker JK, Dozois DJA. Ruminative thought style and depressed mood. J Clin Psychol. 2009;65:1–19.View ArticlePubMedGoogle Scholar
  44. Gratz KL, Roemer L. Multidimensional assessment of emotion regulation and dysregulation: Development, factor structure, and initial validation of the difficulties in emotion regulation scale. J Psychopath Behav. 2004;26:41–54.View ArticleGoogle Scholar
  45. Simons JS, Gaher RM. The Distress Tolerance Scale: Development and validation of a self-report measure. Motiv Emotion. 2005;29:83–102.View ArticleGoogle Scholar
  46. Cohen S, Kamarck T, Mermelstein R. A global measure of perceived stress. J Health Soc Behav. 1983;24:385–96.View ArticlePubMedGoogle Scholar
  47. Miller GE, Chen E, Zhou ES. If it goes up, must it come down? Chronic stress and hypothalamic-pituitary-adrenocortical axis in humans. Psychol Bull. 2007;133:25–45.View ArticlePubMedGoogle Scholar
  48. Kaess M, Hille M, Parzer P, Maser-Guth C, Resch F, Brunner R. Alterations in the neuroendocrinological stress response to acute psychosocial stress in adolescents engaging in non-suicidal self-injury. Psychoendocrinology. 2012;37:157–61.View ArticleGoogle Scholar
  49. Heim C, Ehlert U, Hellhammer DH. The potential role of hypocortisolism in the pathophysiology of stress-related bodily disorders. Psychoneuroendocrino. 2000;25:1–35.View ArticleGoogle Scholar
  50. Hellhammer J, Fries E, Schweisthal OW, Schlotz W, Stone AA, Hagemann D. Several daily measurements are necessary to reliably assess the cortisol rise after awakening: State and trait components. Psychoneuroendocrino. 2007;32:80–6.View ArticleGoogle Scholar
  51. Lipp OV, Derakshan N. Attentional bias to pictures of fear relevant animals in a dot probe task. Emotion. 2005;5:365–9.View ArticlePubMedGoogle Scholar
  52. Lang PJ, Bradley M, Cuthbert BN. International affective picture system (IAPS): Affective ratings of pictures and instruction manual. Technical Report A-8. Gainesville, FL: University of Florida; 2008.Google Scholar
  53. Warriner AB, Kuperman V, Brysbaert M. Norms of valence, arousal and dominance for 13,915 English lemmas. Behav Res Methods. 2013;45:1191–207.View ArticlePubMedGoogle Scholar
  54. Little RJA, Rubin DB. Statistical analysis with missing data. 2nd ed. Hoboken, N.J.: Wiley; 2002.Google Scholar
  55. White IR, Horton NJ, Carpenter J, Pocock SJ. Strategy for intention to treat analysis in randomised trials with missing outcome data. Brit Med J. 2011;342:d40.View ArticlePubMedPubMed CentralGoogle Scholar
  56. Hofmann SG, Sawyer AT, Witt AA, Oh D. The effect of mindfulness-base therapy on anxiety and depression: A meta-analytic review. J Consult Clin Psych. 2010;78:169–83.View ArticleGoogle Scholar
  57. Faul F, Erdfelder E, Lang AG, Buchner A. G*Power 3: A flexible statistical power analysis program for the social, behavioral, and biomedical sciences. Behav Res Methods. 2007;39:175–91.View ArticlePubMedGoogle Scholar
  58. Anderson RA, Rees CS. Group versus individual cognitive-behavioural treatment for obsessive-compulsive disorder: A controlled trial. Behav Res Ther. 2007;45:123–37.View ArticlePubMedGoogle Scholar
  59. Rees CS, van Koesveld KE. An open trial of group metacognitive therapy for obsessive-compulsive disorder. J Behav Ther Exp Psy. 2008;39:451–8.View ArticleGoogle Scholar
  60. Fritz MS, McKinnon DP. Required sample size to detect the mediated effect. Psychol Sci. 2010;18:233–9.View ArticleGoogle Scholar
  61. Jacobson NS, Truax P. Clinical significance: A statistical approach to defining meaningful change in psychotherapy research. J Consult Clin Psych. 1991;59:12–9.View ArticleGoogle Scholar
  62. Hamza CA, Stewart SL, Willoughby T. Examining the link between nonsuicidal self-injury and suicidal behaviour: A review of the literature and an integrated model. Clin Psych Rev. 2012;32:482–95.View ArticleGoogle Scholar
  63. Klonsky ED. Non-suicidal self-injury: An introduction. J Clin Psychol. 2007;63:1039–43.View ArticlePubMedGoogle Scholar
  64. Gagnon J, Hasking PA. Australian psychologists’ attitudes towards suicide and self-harm. Aust J Psychol. 2012;64:75–82.View ArticleGoogle Scholar

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This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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