Exploring the Development, Validity, and Utility of the Short-Form Version of the CHoice of Outcome In Cbt for PsychosEs: A Patient-Reported Outcome Measure of Psychological Recovery

Increasing access to CBT for psychosis patients: study protocol for a randomised controlled trial evaluating brief, targeted CBT for distressing voices delivered by assistant psychologists (GiVE3)

BACKGROUND

The National Institute for Health and Care Excellence (NICE) recommends that cognitive behaviour therapy (CBT) is offered to all patients with a psychosis diagnosis. However, only a minority of psychosis patients in England and Wales are offered CBT. This is attributable, in part, to the resource-intensive nature of CBT. One response to this problem has been the development of CBT in brief formats that are targeted at a single symptom and are deliverable by briefly trained therapists. We have developed Guided self-help CBT (the GiVE intervention) as a brief form of CBT for distressing voices and reported evidence for the feasibility of a randomised controlled trial (RCT) when the intervention was delivered by briefly trained therapists (assistant psychologists). This study will investigate the clinical and cost-effectiveness of the GiVE intervention when delivered by assistant psychologists following a brief training.

METHODS

This study is a pragmatic, two-arm, parallel group, superiority RCT comparing the GiVE intervention (delivered by assistant psychologists) and treatment as usual to treatment as usual alone, recruiting across three sites, using 1:1 allocation and blind post-treatment and follow-up assessments. A nested qualitative study will develop a model for implementation.

DISCUSSION

If the GiVE intervention is found to be effective when delivered by assistant psychologists, this intervention could significantly contribute to increasing access to evidence-based psychological interventions for psychosis patients. Furthermore, implementation across secondary care services within the UK's National Health Service may pave the way for other symptom-specific and less resource-intensive CBT-informed interventions for psychosis patients to be developed and evaluated.

TRIAL REGISTRATION

Current Controlled Trials ISRCTN registration number: 12748453. Registered on 28 September 2022.

Clinical Outcome Assessment Instruments in Schizophrenia: A Scoping Literature Review with a Focus on the Potential of Patient-reported Outcomes

Objective

The complexity inherent in the treatment of schizophrenia results in a multitude of outcome assessments being employed when conducting clinical trials. Subjective outcome assessments and minimal clinically important differences (MCIDs) to evaluate clinical meaningfulness have gained traction; however, the extent of application in evaluation of treatments for schizophrenia is unknown. A scoping review was conducted to assess the availability of published psychometric evaluations, including MCIDs, for clinical outcome assessments used to evaluate treatments for schizophrenia.

Method of Research

Key databases (PubMed®, Embase®, APA PsycINFO®, International Society for Pharmacoeconomics and Outcomes Research) were searched for studies on schizophrenia published from 2010 to 2020. Secondary sources (ClinicalTrials.gov, PROLABELS™, FDA.gov) were also reviewed. Clinical outcome assessments were organized by type (patient-reported outcomes [PROs], clinician-reported outcomes [ClinROs], observer-reported outcomes [ObsROs]) and further classified by intended use (generic, mental health, schizophrenia). Reliability and internal consistency were evaluated using Cronbach's α. External validity was evaluated by intraclass correlation coefficient (ICC).

Results

Across 140 studies, 66 clinical outcome assessments were identified. MCIDs were reported for eight of the 66 studies. Of these, two were PROs (generic) and six were ClinROs/ObsROs (three mental health-specific, three schizophrenia-specific). Reliability was good across generic, mental health-specific, and schizophrenia-specific categories, whereas external validity was strong mainly for schizophrenia-specific PROs. Overall, ClinROs/ObsROs that focused on mental health had good reliability and strong external validity.

Conclusion

This review provides a comprehensive overview of the clinical outcome assessments used in schizophrenia research during the past ten years. Results highlight the heterogeneity of existing outcomes and a growing interest in PROs for schizophrenia.

Coping strategy enhancement for the treatment of distressing voices in young people: A service evaluation within routine clinical practice

BACKGROUND

Hearing voices is a common experience in young people, irrespective of diagnosis. This experience can be associated with distress, self-harm and an increased risk of attempting suicide. However, there are currently no evidence-based interventions which specifically target distressing voice hearing experiences in young people.

METHOD

This was a service evaluation exploring the engagement, outcomes and experiences of young people who were offered a brief 4-session intervention for distressing voices within a Child and Adolescent Mental Health Service (CAMHS) in the UK's National Health Service. The intervention was based on the principles of Coping Strategy Enhancement (CSE).

RESULTS

A total of 24 young people were offered the CSE intervention over a 20-month period. The intervention was completed by 15 young people. Pre-post outcomes suggested clinically meaningful reductions in the negative impact of voices for the majority of the young people. Qualitative feedback was positive and highlighted the value of both a space to talk about voice hearing experiences and a focus upon coping strategies.

CONCLUSIONS

The findings from this service evaluation suggest that CSE can be a brief, acceptable and helpful way for young people within a CAMHS context to start a therapeutic conversation about their distressing voice hearing experiences.

Measuring the longitudinal course of voice hearing under psychological interventions: A systematic review

Trials of psychological interventions targeting distressing voices have used a range of variables to measure outcomes. This has complicated attempts to compare outcomes across trials and to evaluate the effectiveness of these interventions. Therefore, this review aimed to identify the variables that have been used to measure the longitudinal course and impact of voice hearing under these interventions and to evaluate how these variables change over time. Inclusion and exclusion criteria were applied, resulting in a total of 66 articles. Of these, 60 studies (28 RCTs, 23 uncontrolled, 9 non-randomised) were published in peer-reviewed journals, whilst 6 were recently completed or currently ongoing. The findings of this review suggest that a range of variables that are not directly relevant to psychological interventions have been used (e.g., depression, characteristics of voice hearing experience), whilst those directly impacted by psychological interventions (e.g., voice-related distress), broader concepts of outcome (e.g., functioning) and specific associated processes (e.g., self-schema) have received less attention. Findings also showed that the majority of variables demonstrated improvements, but effect sizes varied considerably across trials. This may be attributed to methodological differences such as statistical power, blinding, control groups and different methods of measurement. Our review highlights the importance of determining a set of outcomes that are directly targeted and should change under psychological interventions. Recommendations include the use of voice-related distress as a primary outcome. This can ultimately facilitate comparisons across studies and inform the development of psychological interventions.

Increasing access to cognitive–behavioural therapy for patients with psychosis by evaluating the feasibility of a randomised controlled trial of brief, targeted cognitive–behavioural therapy for distressing voices delivered by assistant psychologists: the GiVE2 trial

Background

Cognitive–behavioural therapy (CBT) is recommended for all patients with psychosis, but is offered to only a minority. This is attributable, in part, to the resource-intensive nature of CBT for psychosis. Responses have included the development of CBT for psychosis in brief and targeted formats, and its delivery by briefly trained therapists. This study explored a combination of these responses by investigating a brief, CBT-informed intervention targeted at distressing voices (the GiVE intervention) administered by a briefly trained workforce of assistant psychologists.

Aims

To explore the feasibility of conducting a randomised controlled trial to evaluate the clinical and cost-effectiveness of the GiVE intervention when delivered by assistant psychologists to patients with psychosis.

Method

This was a three-arm, feasibility, randomised controlled trial comparing the GiVE intervention, a supportive counselling intervention and treatment as usual, recruiting across two sites, with 1:1:1 allocation and blind post-treatment and follow-up assessments.

Results

Feasibility outcomes were favourable with regard to the recruitment and retention of participants and the adherence of assistant psychologists to therapy and supervision protocols. For the candidate primary outcomes, estimated effects were in favour of GiVE compared with supportive counselling and treatment as usual at post-treatment. At follow-up, estimated effects were in favour of supportive counselling compared with GiVE and treatment as usual, and GiVE compared with treatment as usual.

Conclusions

A definitive trial of the GiVE intervention, delivered by assistant psychologists, is feasible. Adaptations to the GiVE intervention and the design of any future trials may be necessary.

Increasing access to brief Coping Strategy Enhancement for distressing voices: a service valuation exploring a possible role for briefly-trained therapists

Hearing voices is a distressing and trans-diagnostic experience. Cognitive behavioural therapy (CBT) is an effective psychological treatment for distressing voices, but is offered to only a minority of patients. Limited resources are a barrier to accessing CBT. Evaluations of brief forms of CBT for voices have offered encouraging findings, but the ability of briefly-trained therapists to deliver these brief therapies has yet to be explored. We evaluated the outcomes of a brief form of CBT (Coping Strategy Enhancement, CSE) for voices when delivered by highly-trained and briefly-trained therapists. This was a service evaluation comparing pre–post outcomes in patients who had completed brief CSE over four sessions, within NHS Mental Health Services, delivered by highly-trained and briefly-trained therapists. The primary outcome was the negative impact scale of the Hamilton Program for Schizophrenia Voices Questionnaire. Data were available from 92 patients who completed a course of brief CSE – nearly half of whom received therapy from a briefly-trained therapist. Modest benefits across the sample were consistent with previous evaluations and did not seem to be influenced by the training of the therapist. This service evaluation offers further evidence that brief CSE can begin a therapeutic conversation about distressing voices within routine clinical practice. The usefulness of this initial conversation does not seem to be reliant upon the extent of therapist training, suggesting that briefly-trained therapists may play a role in increasing access to these conversations for patients distressed by hearing voices.

Key learning aims

(1)

Optimising AVATAR therapy for people who hear distressing voices: study protocol for the AVATAR2 multi-centre randomised controlled trial

BACKGROUND

AVATAR therapy is a novel intervention targeting distressing auditory verbal hallucinations (henceforth 'voices'). A digital simulation (avatar) of the voice is created and used in a three-way dialogue between participant, avatar and therapist. To date, therapy has been delivered over 6 sessions, comprising an initial phase, focusing on standing up to a hostile avatar, and a second phase in which the avatar concedes and focus shifts to individualised treatment targets, including beliefs about voices. The first fully powered randomised trial found AVATAR therapy resulted in a rapid and substantial fall in voice frequency and associated distress that was superior to supportive counselling at 12 weeks. The main objective of this AVATAR2 trial is to test the efficacy of two forms of AVATAR therapy in reducing voice-related distress: AVATAR-brief (standardised focus on exposure, assertiveness and self-esteem) and AVATAR-extended (phase 1 mirroring AVATAR-brief augmented by a formulation-driven phase 2). Secondary objectives include the examination of additional voice, wellbeing and mood outcomes, the exploration of mediators and moderators of therapy response, and examining cost-effectiveness of both forms of therapy compared with usual treatment (TAU).

METHODS

This multi-site parallel group randomised controlled trial will independently randomise 345 individuals to receive AVATAR-brief (6 sessions) plus TAU or AVATAR-extended (12 sessions) plus TAU or TAU alone (1:1:1 allocation). Participants will be people with a diagnosis of schizophrenia spectrum and other psychotic disorders who have heard distressing voices for more than 6 months. The primary outcome is the PSYRATS Auditory Hallucinations Distress dimension score at 16 and 28 weeks, conducted by blinded assessors. Statistical analysis will follow the intention-to-treat principle and data will be analysed using linear mixed models. Mediation and moderation analyses using contemporary causal inference methods will be conducted as secondary analyses. Service costs will be calculated, and cost-effectiveness assessed in terms of quality-adjusted life years accrued.

DISCUSSION

This study will clarify optimal therapy delivery, test efficacy in a multi-site study and enable the testing of the AVATAR software platform, therapy training and provision in NHS settings.

TRIAL REGISTRATION

ISRCTN registry ISRCTN55682735 . Registered on 22 January 2020. The trial is funded by the Wellcome Trust (WT).

A service evaluation of a group mindfulness-based intervention for distressing voices: how do findings from a randomized controlled trial compare with routine clinical practice?

Background:

Person-based cognitive therapy (PBCT) was developed as a treatment for psychosis. The effectiveness of group PBCT was examined in the Mindfulness for Voices (M4V) randomized controlled trial and generated promising results. Group PBCT was implemented as a trans-diagnostic treatment for distressing voices within the Sussex Voices Clinic (SVC), a specialist secondary care mental health service.

Aim:

To conduct a service evaluation of engagement, outcomes and cost of group PBCT within SVC, and to compare engagement and outcomes from routine practice with the M4V trial. Secondary aims were to explore predictors of levels of engagement and change in group PBCT.

Method:

Service level data from 95 SVC patients were evaluated. Descriptive statistics, hypothesis tests and linear regression models were used. The primary clinical outcome was voice-related distress. Engagement levels and pre–post effect sizes were estimated; associated predictors were explored.

Results:

Fifty-nine per cent of patients completed group PBCT within SVC, compared with 72% within M4V. Completers within SVC had lower baseline depression scores compared with non-completers. There were significant improvements in voice-related distress (Cohen’s d = –0.47; p = 0.001), subjective recovery (Cohen’s d = 0.35; p = 0.001) and depression (Cohen’s d = –0.20; p = 0.044); these outcomes were comparable to M4V. Higher baseline subjective recovery and lower depression both predicted improvement in voice-related distress. Therapy within SVC cost an average of £214 per patient.

Conclusion:

PBCT groups can be delivered trans-diagnostically in routine clinical practice. Engagement was lower when compared with an RCT, but outcomes were comparable. The low level of resources involved suggests that group PBCT can offer value for money.