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Down syndrome studies; the transition from secondary school to adulthood: Experiences and life outcomes for youth with an intellectual disability and their families

Helen Jenny Keely Leonard Downs Bebbington MBChB MPH BApplSci (physio) MSc PhD MClinPsych/PhD Principal Research Fellow Head, Child Disability

Environmental enrichment intervention for Rett syndrome: an individually randomised stepped wedge trial

Helen Jenny Leonard Downs MBChB MPH BApplSci (physio) MSc PhD Principal Research Fellow Head, Child Disability +61 419 956 946 08 6319 1763

Epidemiology of craniofacial anomalies and association with intellectual disabilities in Western Australia: A population based study

Helen Mohammed Leonard Junaid MBChB MPH BDS, MDS, MFDS RCPS (Glasg.), DDPH RCS (Eng) Principal Research Fellow Honorary Team Member +61 419 956 946

Establishing a national platform for the provision of evidence based practice in Prader-Willi syndrome

Helen Jenny Leonard Downs MBChB MPH BApplSci (physio) MSc PhD Principal Research Fellow Head, Child Disability +61 419 956 946 08 6319 1763

Hospitalisation for oral health-related conditions in children with intellectual disability in Western Australia: a population-based cohort study

Helen Leonard MBChB MPH Principal Research Fellow +61 419 956 946 helen.leonard@thekids.org.au Principal Research Fellow Areas of research expertise

International CDKL5 Disorder Database

Helen Jenny Leonard Downs MBChB MPH BApplSci (physio) MSc PhD Principal Research Fellow Head, Child Disability +61 419 956 946 08 6319 1763

International Rett syndrome study: InterRett

Helen Jenny Leonard Downs MBChB MPH BApplSci (physio) MSc PhD Principal Research Fellow Head, Child Disability +61 419 956 946 08 6319 1763

Oral parafunction and bruxism in Rett syndrome and associated factors: An observational study

To explore patterns of parafunction, and bruxism, and its relationships with genotype and snoring in individuals with Rett syndrome.

Unraveling the Optimum Latent Structure of Attention-Deficit/Hyperactivity Disorder: Evidence Supporting ICD and HiTOP Frameworks

Attention Deficit/hyperactivity disorder (ADHD) is conceptualized differently in the Diagnostic and Statistical Manual (DSM-5), the International Classification of Diseases-10 (ICD-10), and the Hierarchical Taxonomy of Psychopathology (HiTOP) frameworks. This study applied independent cluster confirmatory factor analysis (ICM-CFA), exploratory structure equation model with target rotation (ESEM), and the S-1 bi-factor CFA approaches to evaluate seven ADHD models yielded by different combinations of these taxonomic frameworks.

The effect of functioning on Quality of Life Inventory-Disability measured quality of life is not mediated or moderated by parental psychological distress

The measurement of quality of life (QOL) in children with intellectual disability often relies upon proxy report via caregivers. The current study investigated whether caregiver psychological distress mediates or moderates the effects of impairment on their ratings of QOL in children with intellectual disability.