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CDKL5 Deficiency Disorder (CDD) is a rare neurodevelopmental disorder characterised by early onset seizures combined with complex healthcare needs and developmental impairment that influence functional domains including communication. Communication is a high priority domain for families but currently used measures demonstrate floor effects. 

MECP2 duplication syndrome (MDS) is an ultrarare, X-linked neurodevelopmental disorder that is poorly understood in terms of its natural history and phenotypic variability. There is limited information on how individuals with MDS acquire, retain or lose fundamental functional skills (gross motor, purposeful hand function and communication) - that of which this study aimed to better characterise in the largest case series to date.

Research on the health literacy of parents with children with intellectual disability is limited. Understanding parents' healthcare skills and needs is essential for improving children's health and developing effective support. In this study we aimed to (1) explore the health literacy skills of parents that enabled them to support the health needs of their child with intellectual disability and the factors influencing these skills, and (2) identify opportunities to support parent health literacy.

To evaluate the psychometric properties of the Quality of Life Inventory -Disability (QI-Disability) for individuals with Dravet syndrome (DS) or Lennox-Gastaut syndrome (LGS), two rare developmental and epileptic encephalopathy conditions.

CDKL5 deficiency disorder is a rare and severe developmental and epileptic encephalopathy that has profound effects on communication. It is essential that communication be measured accurately for upcoming gene therapy trials. The Communication Inventory Disability-Observer Reported was developed from a framework of communication derived from parent/caregiver interview data in consultation with disability and communication experts, and after reviewing concepts in existing measures.

General movements (GMs) are part of the spontaneous movement repertoire and are present from early fetal life onwards up to age five months. GMs are connected to infants' neurological development and can be qualitatively assessed via the General Movement Assessment. In particular, between the age of three to five months, typically developing infants produce fidgety movements and their absence provides strong evidence for the presence of cerebral palsy.

It is now well accepted that germline or de novo genetic alterations predispose to cancer development, especially during childhood. Among them, constitutive trisomy 21, also known as Down syndrome (DS), has been shown to predispose to acute leukemia affecting both the myeloid (ML-DS) and lymphoid (DS-ALL) lineages. ML-DS is associated with a good prognosis compared to children without DS, due in part to a higher sensitivity to conventional chemotherapy.

Estimate the global prevalence of neurodevelopmental impairment in children with Robin sequence (RS) at one year or more of age.

To evaluate the associations between complex hip surgery and subsequent hospitalizations in children with intellectual disability, including a subset of children with cerebral palsy.

The CDKL5 Clinical Severity Assessment is a comprehensive, content-validated measurement tool capturing the diverse challenges of cyclin-dependent kinase-like 5 deficiency disorder, a genetically caused developmental epileptic encephalopathy. The CCSA is divided into clinician-reported and caregiver-reported assessments. The aim of this study was to evaluate the factor structure of these measures through confirmatory factor analysis and evaluate their validity and reliability.