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Addressing the challenges of intellectual disability identification for health policy and research in Australia

This article discusses the important issue of the need for a stable definition of intellectual disability in order to allow comparisons by place and over time such as in the monitoring of this population's health needs and utilization. The aim of the new Australian National Centre for Intellectual Disability Health, established in 2023, is to ensure that all Australian children and adults with intellectual disability receive high-quality healthcare that meets their needs.

Functional skills in MECP2 duplication syndrome: developmental dynamics and regression

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.

What is it like living with X-linked hypophosphatemia?: results from an Australian consumer survey

X-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.

Development and initial validation of the Communication Inventory Disability – Observer Reported (CID-OR): a measure of communication in CDKL5 deficiency disorder

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. 

Beyond Seizures as an Outcome Measure: A Global Severity Scoring System for CDKL5 Deficiency Disorder

CDKL5 deficiency disorder (CDD) is a rare developmental and epileptic encephalopathy (DEE) associated with multiple impairments and comorbidities. Outcome measures for disease-modifying clinical trials for DEEs should measurably capture a spectrum of caregiver priorities and be externally validated.

Psychometric validation of the quality of life Inventory − Disability (QI-Disability) among patients with Lennox-Gastaut syndrome and Dravet syndrome

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.

Six cases of ENPP1 pathogenic variants causing autosomal recessive hypophosphatemic rickets type 2 and generalized arterial calcification of infancy

Autosomal 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.

"What about us?"- the drawbacks of current bruxism assessment criteria in evaluating vulnerable groups

Jenny Helen Kingsley Downs Leonard Wong BApplSci (physio) MSc PhD MBChB MPH MBBS, MPH, MMedStat Head, Child Disability Principal Research Fellow

How can we reach long-lasting inclusive participation for all? A vision for the future

In 2022, an international conference was held focusing on 'participation'. We shared current evidence, identified knowledge gaps and worked together to understand what new knowledge and community and practice changes were needed. This brief communication is a summary of the conference delegates' discussions.  

Cases of trisomy 21 and trisomy 18 among historic and prehistoric individuals discovered from ancient DNA

Aneuploidies, and in particular, trisomies represent the most common genetic aberrations observed in human genetics today. To explore the presence of trisomies in historic and prehistoric populations we screen nearly 10,000 ancient human individuals for the presence of three copies of any of the target autosomes. We find clear genetic evidence for six cases of trisomy 21 (Down syndrome) and one case of trisomy 18 (Edwards syndrome), and all cases are present in infant or perinatal burials.