Persons with childhood-onset intellectual or complex disabilities have an elevated probability of encountering delayed or erroneous diagnoses during hospital treatment. It is imperative to consider the possibility that mistreatment may worsen their health. Persons with intellectual disabilities face numerous challenges in accessing and using healthcare. These challenges include structural and communication barriers, as well as a dearth of competencies among health professionals in interacting with persons with intellectual disabilities. Nevertheless, there is a paucity of studies that analyse the challenges faced by persons with intellectual disabilities in hospital and even fewer that involve persons with intellectual disabilities in the research process. Therefore, the objective of the study described in this protocol is to identify the salient research questions for improving hospital care of adults with childhood-onset intellectual disabilities by collecting and prioritising the different perspectives of patients, caregivers and clinicians.

The study design is based on the Priority Setting Partnership procedure of the James Lind Alliance, encompassing four steps to identify and prioritise issues with patients, caregivers and clinicians. Initially, problems and issues pertinent to those affected are collated using an open online questionnaire and subsequently clustered into topics. In the second step, the topics are transformed into potential research questions and reviewed by available scientific literature. Subsequently, research questions that cannot yet be answered by current literature are prioritised by participants in a second online questionnaire. Finally, the 25 questions rated most relevant are to be discussed in a one-day workshop with participants reflective of all target groups. The salient 10 research questions are to be determined using nominal group technique.

The study has received a positive ethics vote from the Ethics Committee at the Ludwig Maximilian University of Munich in accordance with the Declaration of Helsinki on 21 March 2025 (reference 25-0106). This study’s findings will be shared in academic conferences and published in scientific peer-reviewed journals.

DRKS00037347.