Eligibility criteria in NIH-funded clinical trials: Can adults with intellectual disability get in?

Responsible inclusion: A systematic review of consent to social-behavioral research with adults with intellectual disability in the US

BACKGROUND

In recognition of their status as a health disparities population, there is growing emphasis on conducting research inclusive of adults with intellectual disability to generate new knowledge and opportunities to improve health and equity. Yet they are often excluded from research, and human research participant protection experts and researchers lack agreement on effective consent protocols for their inclusion.

OBJECTIVE

We sought to identify approaches to consent in US-based social-behavioral research with adults with intellectual disability.

METHODS

We conducted a systematic review on approaches to self-consent with adults with intellectual disability published between 2009 and 2023, identified via searching eight databases and reference list hand searches. We identified 13 manuscripts and conducted a thematic analysis.

RESULTS

Our analysis identified themes related to guiding principles, strategies to enhance informed and voluntary consent, approaches to consent capacity, involving individuals subject to guardianship, and strategies for expressing decisions and enhancing ongoing decisions.

CONCLUSIONS

Manuscripts largely reflected an emphasis on identifying approaches to consent that reflect disability rights principles to promote the right to be included and make one's own decisions based on assessment of relevant information, risks and benefits, and to employ reasonable modifications to achieve inclusion. To avoid the risks of exclusion and advance the responsible inclusion of adults with intellectual disability, we make recommendations to align consent approaches anchored in contemporary thinking about human research participant protections, including through integration with disability rights.

Perampanel for Treatment of People with a Range of Epilepsy Aetiologies in Clinical Practice: Evidence from the PERMIT Extension Study

INTRODUCTION

It is important to assess the effectiveness of an antiseizure medication in treating different epilepsy aetiologies to optimise individualised therapeutic approaches. Data from the PERaMpanel pooled analysIs of effecTiveness and tolerability (PERMIT) Extension study were used to assess the effectiveness and safety/tolerability of perampanel (PER) when used to treat individuals with a range of epilepsy aetiologies in clinical practice.

METHODS

A post hoc analysis was conducted of PERMIT Extension data from individuals with a known aetiology. Retention was assessed after 3, 6 and 12 months. Effectiveness was assessed after 3, 6 and 12 months and at the last visit (last observation carried forward). Effectiveness assessments included responder rate (≥ 50% seizure frequency reduction) and seizure freedom rate (no seizures since at least the prior visit). Safety/tolerability was assessed by evaluating adverse events (AEs) and AEs leading to discontinuation.

RESULTS

PERMIT Extension included 1945 individuals with structural aetiology, 1012 with genetic aetiology, 93 with an infectious aetiology, and 26 with an immune aetiology. Retention rates at 12 months were 61.1% (structural), 65.9% (genetic), 56.8% (infectious) and 56.5% (immune). At the last visit, responder rates (total seizures) were 43.3% (structural), 68.3% (genetic), 37.0% (infectious) and 20.0% (immune), and corresponding seizure freedom rates were 15.8%, 46.5%, 11.1% and 5.0%, respectively. AE incidence rates were 58.0% (structural), 46.5% (genetic), 51.1% (infectious) and 65.0% (immune), and corresponding rates of discontinuation due to AEs over 12 months were 18.9%, 16.4%, 18.5% and 21.7%, respectively. The types of AEs reported were generally consistent across aetiology subgroups, with no idiosyncratic AEs emerging.

CONCLUSION

Although PER was effective and generally well tolerated when used to treat individuals with a range of epilepsy aetiologies in clinical practice, variability in its effectiveness and tolerability across the subgroups indicates that PER may be particularly useful for individuals with specific epilepsy aetiologies.

Advancing genomics to improve health equity

Health equity is the state in which everyone has fair and just opportunities to attain their highest level of health. The field of human genomics has fallen short in increasing health equity, largely because the diversity of the human population has been inadequately reflected among participants of genomics research. This lack of diversity leads to disparities that can have scientific and clinical consequences. Achieving health equity related to genomics will require greater effort in addressing inequities within the field. As part of the commitment of the National Human Genome Research Institute (NHGRI) to advancing health equity, it convened experts in genomics and health equity research to make recommendations and performed a review of current literature to identify the landscape of gaps and opportunities at the interface between human genomics and health equity research. This Perspective describes these findings and examines health equity within the context of human genomics and genomic medicine.

Patient-advocate-led global coalition adapting fit-for-purpose outcomes measures to assure meaningful inclusion of DEEs in clinical trials

Existing clinical tools that measure non-seizure outcomes lack the range and granularity needed to capture skills in developmental and epileptic encephalopathy (DEE)-affected individuals who also fall in the severe to profound range of intellectual disability. This effectively excludes those with severe impairments from clinical trials, impeding the ability of sponsors to evaluate disease-modifying therapies (DMTs). The Inchstone Project, an international, patient advocate-led collaboration, brings together leading researchers, clinicians, pharmaceutical companies, and advocates to develop an adapted, validated assessment battery within 5 years. The goal is to support trials of DMTs for the DEEs by providing sufficiently sensitive measurement tools to demonstrate therapeutic efficacy. An initial pilot study administered 7 established assessments to 10 individuals affected by SCN2A-DEE, identifying specific limitations of existing measures and areas for improvement. It was clear that most tools do not account for challenges throughout the DEE population, including vision impairments, significant motor impairments and profound intellectual disability, which need to be accounted for in creating a 'fit-for-purpose' battery for the DEE population. Several novel assessments, including two measures of responsivity developed for use in monitoring recovery after acquired brain injury as well as individualized Goal Attainment Scaling, showed promise in this group. The team also completed a DEE-wide survey with over 270 caregivers documenting their children's abilities and priorities for their improvement from new treatments. The Inchstone team is using this information to evaluate how existing tools might be updated to better capture what is most important to families and measure their child's small but important improvements over time. These efforts are building a coherent picture across multiple DEEs of what domains, or concepts of interest, have the greatest impact on most patients and families. The Inchstone team is on course to adapt non-seizure outcome measures that are (1) sufficiently sensitive to measure small increments of meaningful change ('Inchstones') and (2) applicable to multiple DEE conditions.

Trauma treatment using Narrative Exposure Therapy adapted to persons with intellectual disabilities or severe chronic mental disorders - a randomised controlled pilot study with an embedded observational study

BACKGROUND

Despite an increased likelihood of experiencing traumatic events and increased vulnerability, there are only few publications on trauma therapy for persons with intellectual disabilities (IDs). This pilot study for the first time investigates the feasibility and effectiveness of Narrative Exposure Therapy (NET) within this target group modified by Plain Language.

METHODS

A group of n = 10 participants with ID dual diagnoses and another group of n = 5 participants with severe and chronic mental disorders were separately stratified and randomised, then forming together an intervention group (n = 7) and a waiting list control group (n = 8). All participants were treated with NET attuned to their communication abilities by using Plain Language. Primary outcome was the post-traumatic stress measured with the Post-Traumatic Symptom Scale-10 before and after the intervention. In addition, the Adverse Childhood Experience Index was used for diagnostic purposes. Data were analysed using t-test for repeated measures and analysis of covariance.

RESULTS

Narrative Exposure Therapy and the randomised controlled trial study proved to be successfully conductible with participants with IDs in a congregated residential service. Although the corresponding effect size was high (partial eta square = 0.188), the between-group difference was not significant (P = 0.12). Analysis of the observational study resulted in a highly significant improvement for participants with IDs (P < 0.001; Hedges' g = 2.36) and in a significant improvement in participants with severe and chronic mental disorders (P < 0.013; Hedges' g = 1.52). Additionally, the participants with IDs show a significantly better reduction of symptom burden (P = 0.03; partial eta square = 0.327).

CONCLUSIONS

The results provide a first evidence for a possible and successful implementation of NET modified in Plain Language for persons with IDs and complex mental health support needs. Completeness in responding to the items of Post-Traumatic Symptom Scale-10 and Adverse Childhood Experience Index indicates the suitability of these instruments for both groups of participants. Although the group difference in the randomised controlled trial failed to achieve statistical significance mainly due to the small sample size, the results of the embedded observational study are promising for the conduct of further studies with the modified NET.

Evaluating an informed consent process designed to improve inclusion of adults with intellectual disability in research

BACKGROUND

Adults with intellectual disability (ID) are both underrepresented in research and enrolled in studies they may not understand. Instead of facilitating research engagement, the informed consent process often fails to elucidate its essential elements.

AIMS

We evaluated whether a novel informed consent process was more effective than current practice at helping adults with ID understand key elements of research.

METHODS AND PROCEDURES

21 adults with ID completed a novel iterative teaching process (ITP) for teaching and assessing informed consent. The ITP was used to compare the baseline (Conventional) approach to an Easy Read and a Conversational approach. Participants were asked a series of questions to assess their attitudes toward, and their comprehension of, the materials.

OUTCOMES AND RESULTS

The pilot found encouraging evidence for the efficacy and feasibility of the ITP. The two novel ITP approaches were both superior to current practice.

CONCLUSIONS AND IMPLICATIONS

This project contributes to a growing literature by introducing a process for teaching and evaluating informed consent. Results indicate that comprehension of informed consent materials can be taught to, and learned by, adults with ID with proper accommodations.

Shining a light on disability and health communication

Examining health inequities in the context of communication related to health and health care is important for creating health equity. There has been an increasing number of studies conducting health communication research to address inequities, but research that has prioritized people with disabilities remains limited. Over the past year, there has been a growing focus on disability and health research, including peer-reviewed papers in this volume. The health communication field can build on this momentum to continue to focus on disability in topics related to health information, misinformation, health literacy, interpersonal communication, media campaigns, media representation, digital health, communication technologies, and more.