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Research
Six cases of ENPP1 pathogenic variants causing autosomal recessive hypophosphatemic rickets type 2 and generalized arterial calcification of infancyAutosomal recessive hypophosphatemic rickets type 2 (ARHR2) and generalized arterial calcification of infancy (GACI) occur secondary to biallelic ectonucleotide pyrophosphate/phosphodiesterase 1 (ENPP1) loss-of-function pathogenic variants. GACI is a life-threatening condition, often presenting in the neonatal period with heart failure and hypertension, caused by calcification of the media in large- and medium-sized arteries.
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What is it like living with X-linked hypophosphatemia?: results from an Australian consumer surveyX-linked hypophosphatemia (XLH) is a rare, X-linked dominant condition with a high burden of both physical and psychosocial disease. This study aimed to describe the experience and burden of disease for children and adults living with XLH in Australia by inviting affected individuals and their carers to complete an online questionnaire. Of the 46 responses, half were completed by a person with XLH, and half by carers. Thirty percent were male, 33% were aged less than 18 yr.
Research
Development and initial validation of the Communication Inventory Disability – Observer Reported (CID-OR): a measure of communication in CDKL5 deficiency disorderCDKL5 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.
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The Feasibility of Personalized Endpoints in Assessing Treatment Outcomes for Rare Diseases: A Pilot Study of Goal Attainment Scaling in SCN2A-AssociatedFor individuals living with rare neurodevelopmental disorders, particularly those who are at the most severe end of the spectrum, standardized outcome measures may lack the sensitivity to capture small but meaningful changes.
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Associations between genotype, phenotype and behaviours measured by the Rett syndrome behaviour questionnaire in Rett syndromeRett syndrome (RTT) is a rare neurodevelopmental disorder with developmental impairments, comorbidities, and abnormal behaviours such as hand stereotypies and emotional features. The Rett Syndrome Behaviour Questionnaire (RSBQ) was developed to describe the behavioural and emotional features of RTT.
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Using Focussed Ethnography to Observe and Understand the Actions and Interactions of People With Prader-Willi Syndrome When They Exercise at a Community Gym: A ProtocolExercise for people with Prader-Willi syndrome (PWS) is important for their health and wellbeing and can provide opportunities for community participation. However, they may find it difficult to participate in some contexts, such as community gyms because social and environmental barriers in these settings may compound difficulties caused by physical impairments or intellectual disability.
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Burden of illness in Rett syndrome: initial evaluation of a disorder-specific caregiver surveyRett syndrome (RTT) is a severe X-linked neurodevelopmental disorder associated with multiple neurologic impairments. Previous studies have shown challenges to the quality of life of individuals with RTT and their caregivers. However, instruments applied to quantify disease burden have not adequately captured the impact of these impairments on affected individuals and their families. Consequently, an international collaboration of stakeholders aimed at evaluating Burden of Illness in RTT was organized.
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Hospitalizations Following Complex Hip Surgery in Children with Intellectual Disability: A Self-Controlled Case Series AnalysisTo evaluate the associations between complex hip surgery and subsequent hospitalizations in children with intellectual disability, including a subset of children with cerebral palsy.
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Caregiver Perspective of Benefits and Side Effects of Anti-Seizure Medications in CDKL5 Deficiency Disorder from an International DatabaseCDKL5 deficiency disorder presents as a challenging condition with early-onset refractory seizures, severe developmental delays, and a range of other neurological symptoms. Our study aimed to explore the benefits and side effects of anti-seizure medications in managing seizures among individuals with CDKL5 deficiency disorder, drawing on data from the International CDKL5 Disorder Database.
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Psychometric evaluation of clinician- and caregiver-reported clinical severity assessments for individuals with CDKL5 deficiency disorderThe 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.