Rationale: While internet-based interventions have been used for over ten years in Dutch forensic psychiatric outpatient care, no thorough evaluation study has been conducted yet. Studies on internet-based interventions in other mental healthcare sectors show promising results: they can increase the quality and efficiency of care. However, it is not clear if, why and for whom these interventions work in forensic mental healthcare. It is especially important to study whether these interventions are of added value for this complex patient population, known for its low treatment motivation, co-morbidity and low literacy levels.
Objective: The primary objective of this study is to investigate whether the addition of the internet-based intervention 'Aggression' to forensic psychiatric outpatient treatment as usual (TAU) results in better treatment outcomes in terms of self-reported regulatory emotional self-efficacy, treatment readiness, and aggression. Additionally, it is investigated whether the experimental group requires fewer treatment sessions and improves more on dynamic risk factors. Furthermore, to gain more insight into for whom these interventions work, it is investigated whether engagement with the internet-based intervention predicts adherence and effectiveness. Finally, this study aims to explore reasons for the (in)effectiveness of the intervention according to patients and therapists.
Study design: To investigate if the use of internet-based interventions is of added value for treatment of forensic psychiatric outpatients, a multicenter, non-blinded, parallel groups, randomized controlled trial design is used. Patients fill out three short self-report questionnaires four times: at baseline, mid-treatment (+6 weeks), post-treatment (+14 weeks) and at follow-up (+26 weeks). Semi-structured interviews with a randomly selected sample of 20 patients from the experimental condition and with all participating therapists are conducted to explain the results of the RCT.
Study population: The target group of this study consists of forensic psychiatric outpatients, treated in four Dutch organizations for aggression regulation problems.
Intervention (if applicable): This study investigates the existing internet-based intervention Aggression, which was introduced in forensic mental healthcare over ten years ago. However, as is the case with other internet-based interventions, uptake in practice remains relatively low. 'Aggression' is used as an addition to treatment as usual, and thus does not replace any part of treatment in this study. The intervention is earlier developed by the CE-certified company Minddistrict. The last couple of months the intervention has been cosmetically adjusted in close cooperation with therapists, patients and other stakeholders so that it fits the current design and lay-out of Minddistrict. The goals of this intervention are to (1) increasing the motivation to change, (2) acquiring skills for dealing with conflict, and (3) breaking the cycle of aggression by providing knowledge on situational, emotional, cognitive and physical triggers. It contains ten lessons, each containing written texts, videos and audio files, and short written assignments on which the therapist can give feedback.
Main study parameters/endpoints: All participants fill out three validated, short self-report questionnaires on self-efficacy, treatment readiness and aggression at four points during the study. Participants in the experimental conditions also fill out an engagement questionnaire during the use of the intervention. Dynamic risk factors are assessed via a risk assessment instrument that is already used as a standard part of treatment according to Dutch guidelines and the number of treatment sessions are retrieved from existing systems. The patient and therapist perspective is take in into account by means of semi-structured interviews.
Nature and extent of the burden and risks associated with participation, benefit and group relatedness: Since participants only have to fill out short questionnaires, participating in this study is not viewed as a major burden. Furthermore, interventions of Minddistrict have been used for over ten years in mental healthcare, during which no risks or adverse events have been observed. Because not all forensic psychiatric patients receive internet-based interventions as part of their standard care and because these interventions are not yet evaluated and are thus not evidence-based, participants in the control condition are not deprived of effective treatment. During the entire study, experienced therapists monitor the patient's progress. Finally, multiple precautions are taken to ensure that patients are aware that the decision to participate does not have any effect on their treatment progress. Consequently, the burdens and risks associated with this study are low or even non-existent.
