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Author

  • Helen Leonard
Review article

Cannabis for refractory epilepsy in children: A review focusing on CDKL5 Deficiency Disorder

Dale, T., Downs, J., Olson, H., Bergin, A. M., Smith, S. & Leonard, H., Mar 2019, In : Epilepsy Research. 151, p. 31-39 9 p.

Research output: Contribution to journalReview article

3 Citations (Scopus)

Cyclin-Dependent Kinase-Like 5 Deficiency Disorder: Clinical Review

Olson, H. E., Demarest, S. T., Pestana-Knight, E. M., Swanson, L. C., Iqbal, S., Lal, D., Leonard, H., Cross, J. H., Devinsky, O. & Benke, T. A., 1 Aug 2019, In : Pediatric Neurology. 97, p. 18-25 8 p.

Research output: Contribution to journalReview article

12 Citations (Scopus)

Prevalence estimates of mental health problems in children and adolescents with intellectual disability: A systematic review and meta-analysis

Buckley, N., Glasson, E. J., Chen, W., Epstein, A., Leonard, H., Skoss, R., Jacoby, P., Blackmore, A. M., Srinivasjois, R., Bourke, J., Sanders, R. J. & Downs, J., 30 May 2020, In : Australian and New Zealand Journal of Psychiatry.

Research output: Contribution to journalReview article

Requirements for improving health and well-being of children with Prader-Willi syndrome and their families

Mackay, J., McCallum, Z., Ambler, G. R., Vora, K., Nixon, G., Bergman, P., Shields, N., Milner, K., Kapur, N., Crock, P., Caudri, D., Curran, J., Verge, C., Seton, C., Tai, A., Tham, E., Musthaffa, Y., Lafferty, A. R., Blecher, G., Harper, J. & 6 others, Schofield, C., Nielsen, A., Wilson, A., Leonard, H., Choong, C. S. & Downs, J., 30 Jun 2019, In : Journal of Paediatrics and Child Health.

Research output: Contribution to journalReview article

Open Access
1 Citation (Scopus)

The Brain Basis of Comorbidity in Neurodevelopmental Disorders

Licari, M. K., Finlay-Jones, A., Reynolds, J. E., Alvares, G. A., Spittle, A. J., Downs, J., Whitehouse, A. J. O., Leonard, H., Evans, K. L. & Varcin, K., Mar 2019, In : Current Developmental Disorders Reports. 6, 1, p. 9-18 10 p.

Research output: Contribution to journalReview article

The prevalence and phenotypic signatures of mental ill health for children and adolescents with a neurogenetic disorder associated with intellectual disability: a systematic review

Glasson, E., Buckley, N., Chen, W., Leonard, H., Epstein, A., Skoss, R., Jacoby, P., Blackmore, A. M., Bourke, J. & Downs, J., 2020, (Accepted/In press) In : Journal of the American Academy of Child & Adolescent Psychiatry.

Research output: Contribution to journalReview article

The prevalence of mental health disorders and symptoms in children and adolescents with cerebral palsy: a systematic review and meta-analysis

Downs, J., Blackmore, A. M., Epstein, A., Skoss, R., Langdon, K., Jacoby, P., Whitehouse, A. J. O., Leonard, H., Rowe, P. W., Glasson, E. J. & The Cerebral Palsy Mental Health Group, 1 Jan 2018, In : Developmental Medicine and Child Neurology. 60, 1, p. 30-38 9 p.

Research output: Contribution to journalReview article

22 Citations (Scopus)
7 Citations (Scopus)

What effect does regular exercise have on oxidative stress in people with Down syndrome? A systematic review with meta-analyses

Shields, N., Downs, J., de Haan, J. B., Taylor, N. F., Torr, J., Fernhall, B., Kingsley, M., Mnatzaganian, G. & Leonard, H., 1 Jun 2018, In : Journal of Science and Medicine in Sport. 21, 6, p. 596-603 8 p.

Research output: Contribution to journalReview article

1 Citation (Scopus)
Other chapter contribution

Application of Population-Based Linked Data to the Study of Intellectual Disability and Autism

Leonard, H., Glasson, E. J., Bebbington, A., Hammond, G., Croft, D., Pikora, T., Fairthorne, J., O'Donnell, M., O'Leary, C. M., Hansen, M., Watson, L., Francis, R. W., Carter, K., Mckenzie, A., Bower, C., Bourke, J. & Glauert, R., 2013, International Review of Research in Developmental Disabilities. Richard, C. U. (ed.). Academic Press, p. 281-327

Research output: Chapter in Book/Conference paperOther chapter contribution

11 Citations (Scopus)

Improving health outcomes in Rett syndrome

Downs, J., Leonard, H., Croft, D., Ravikumara, M., Bathgate, K., Ellaway, C., Thompson, S., Percy, A. & Baikie, G., 2013, Nutritional and Digestive Health. Australia

Research output: Chapter in Book/Conference paperOther chapter contribution

Open Access
File
200 Downloads (Pure)
Literature review

Perspectives on hand function in girls and women with Rett syndrome

Downs, J., Parkinson, S., Ranelli, S., Leonard, H., Diener, P. & Lotan, M., Jun 2014, In : Developmental Neurorehabilitation. 17, 3, p. 210-217

Research output: Contribution to journalLiterature review

Open Access
File
7 Citations (Scopus)
498 Downloads (Pure)
Letter

Resourceful and creative methods are necessary to research rare disorders

Leonard, H., Anderson, A., Bebbington, A., Bao, X., Wong, K., Williams, S. & Downs, J., 2013, In : Developmental Medicine and Child Neurology. Online, p. 1-2

Research output: Contribution to journalLetter

Open Access
2 Citations (Scopus)
Editorial

Regan et al. Reply to "Sibling Comparison Design in Birth-Spacing Studies"

Regan, A. K., Ball, S. J., Warren, J. L., Malacova, E., Marston, C., Nassar, N., Leonard, H., de Klerk, N. & Pereira, G., Jan 2019, In : American Journal of Epidemiology. 188, 1, p. 22-23 2 p.

Research output: Contribution to journalEditorial

Open Access
Comment/debate

Association between Interpregnancy Interval and Adverse Birth Outcomes in Women with a Previous Stillbirth: An International Cohort Study

Regan, A. K., Gissler, M., Magnus, M. C., Haberg, S. E., Ball, S., Malacova, E., Nassar, N., Leonard, H. & Pereira, G., 1 Sep 2019, In : Obstetrical and Gynecological Survey. 74, 9, p. 507-508 2 p.

Research output: Contribution to journalComment/debate

Chapter

Longitudinal and population-based approaches to study the lifelong trajectories of children with neurodevelopmental conditions

Downs, J. & Leonard, H., 2013, Life Quality Outcomes in Children and Young Adults with Neurological and Developmental Conditions: Concepts, evidence and practice. Ronen, GM. & Rosenbaum, PL. (eds.). United Kingdom: Mac Keith Press, p. 329-343

Research output: Chapter in Book/Conference paperChapter

Pre-existing differences in mothers of children with Autism Spectrum disorder and/or intellectual disability: A review

Fairthorne, J. C., Langridge, A., Bourke, J. & Leonard, H., 2013, Recent advances in Autism Spectrum Disorders. Fitzgerald, M. (ed.). Croatia: InTech, p. 387-424

Research output: Chapter in Book/Conference paperChapter

Book

Management Guidelines: developmental disability

Lennox, N., Boocock, H., Bower, C., Burbridge, M., Cohen, J., Dojcinov, I., Durvasula, S., Eastgate, G., Franklin, C., Gibson, J., Grover, S., Hemsley, B., Johnstone, J., Kerr, M., Lane, M., Leonard, H., Moulds, R., North, K., O'Brien, G., O'Leary, C. & 12 others, Pendergast, D., Reddihough, D., Rinebart, N., Rogers, S., Rowell, M., Simpson, J., Small, J., Stuckey, B., Taylor Gomez, M., Tracy, J., Trollor, J. & Tucker, M., 2012, 3 ed. Melbourne: Therapeutic Guidelines Limited.

Research output: Book/ReportBook

Article

A comparison of autism prevalence trends in Denmark and Western Australia

Parner, E. T., Thorsen, P., Dixon, G., De Klerk, N., Leonard, H., Nassar, N., Bourke, J., Bower, C. & Glasson, E. J., 2011, In : Journal of Autism and Developmental Disorders. 41, 12, p. 1601-1608 1608 p.

Research output: Contribution to journalArticle

46 Citations (Scopus)

A framework for understanding quality of life domains in individuals with the CDKL5 deficiency disorder

Tangarorang, J., Leonard, H., Epstein, A. & Downs, J., Feb 2019, In : American Journal of Medical Genetics Part A. 179, 2, p. 249-256 8 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Altered attainment of developmental milestones influences the age of diagnosis of Rett syndrome

Fehr, S., Bebbington, A., Ellaway, C., Rowe, P., Leonard, H. & Downs, J., 2011, In : Journal of Child Neurology. 26, 8, p. 980-987

Research output: Contribution to journalArticle

30 Citations (Scopus)

An exploration of the use of eye gaze and gestures in females with Rett Syndrome

Urbanowicz, A., Downs, J. A., Girdler, S., Ciccone, N. & Leonard, H., 2016, In : Journal of Speech, Language, and Hearing Research. 59, 6, p. 1373-1383 11 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

An investigation of the determinants of quality of life in adolescents and young adults with Down syndrome

Haddad, F., Bourke, J., Wong, K. & Leonard, H., 1 Jun 2018, In : PLoS One. 13, 6, 0197394.

Research output: Contribution to journalArticle

Open Access
3 Citations (Scopus)

Apgar score and risk of autism

Modabbernia, A., Sandin, S., Gross, R., Leonard, H., Gissler, M., Parner, E. T., Francis, R., Carter, K., Bresnahan, M., Schendel, D., Hornig, M. & Reichenberg, A., Feb 2019, In : European Journal of Epidemiology. 34, 2, p. 105-114 10 p.

Research output: Contribution to journalArticle

Open Access
4 Citations (Scopus)

A Population-Based Matched-Sibling Analysis Estimating the Associations Between First Interpregnancy Interval and Birth Outcomes

Regan, A. K., Ball, S. J., Warren, J. L., Malacova, E., Padula, A., Marston, C., Nassar, N., Stanley, F., Leonard, H., de Klerk, N. & Pereira, G., Jan 2019, In : American Journal of Epidemiology. 188, 1, p. 9-16 8 p.

Research output: Contribution to journalArticle

Open Access
7 Citations (Scopus)

A qualitative investigation of recovery after femoral fracture in Rett syndrome

Horne, T., Leonard, H., Stannage, K. & Downs, J., 1 Mar 2017, In : Child: Care, Health and Development. 43, 2, p. 232-239 8 p.

Research output: Contribution to journalArticle

Open Access
File
2 Citations (Scopus)
357 Downloads (Pure)
Open Access

Aspects of speech-language abilities are influenced by MECP2 mutation type in girls with Rett syndrome

Urbanowicz, A., Downs, J., Girdler, S. J., Ciccone, N. A. & Leonard, H., 21 Jan 2015, In : American Journal of Medical Genetics, Part A. 167, 2, p. 354-362 9 p.

Research output: Contribution to journalArticle

Open Access
File
18 Citations (Scopus)
257 Downloads (Pure)
Open Access

Assessment and management of nutrition and growth in rett syndrome

Leonard, H., Ravikumara, M., Baikie, G., Naseem, N., Ellaway, C., Percy, A., Abraham, S., Geerts, S., Lane, J., Jones, M., Bathgate, K. & Downs, J., Oct 2013, In : Journal of Pediatric Gastroenterology and Nutrition. 57, 4, p. 451-460

Research output: Contribution to journalArticle

Open Access
30 Citations (Scopus)

Association between interpregnancy interval and adverse birth outcomes in women with a previous stillbirth: an international cohort study

Regan, A. K., Gissler, M., Magnus, M. C., Håberg, S. E., Ball, S., Malacova, E., Nassar, N., Leonard, H. & Pereira, G., 13 Apr 2019, In : The Lancet. 393, 10180, p. 1527-1535 9 p.

Research output: Contribution to journalArticle

Open Access
File
8 Citations (Scopus)
443 Downloads (Pure)

Association of Genetic and Environmental Factors with Autism in a 5-Country Cohort

Bai, D., Yip, B. H. K., Windham, G. C., Sourander, A., Francis, R., Yoffe, R., Glasson, E., Mahjani, B., Suominen, A., Leonard, H., Gissler, M., Buxbaum, J. D., Wong, K., Schendel, D., Kodesh, A., Breshnahan, M., Levine, S. Z., Parner, E. T., Hansen, S. N., Hultman, C. & 2 others, Reichenberg, A. & Sandin, S., 1 Jan 2019, In : JAMA Psychiatry. 76, 10, p. 1035-1043

Research output: Contribution to journalArticle

28 Citations (Scopus)
Open Access
File
40 Citations (Scopus)
280 Downloads (Pure)

Association of gestational age at birth with reasons for subsequent hospitalisation: 18 Years of follow-up in a Western Australian population study

Srinivasjois, R., Slimings, C., Einarsdóttir, K., Burgner, D. & Leonard, H., 26 Jun 2015, In : PLoS One. 10, 6, p. 1-11

Research output: Contribution to journalArticle

Open Access
18 Citations (Scopus)

Australian children living with rare diseases: experiences of diagnosis and perceived consequences of diagnostic delays

Zurynski, Y., Deverell, M., Dalkeith, T., Johnson, S., Christodoulou, J., Leonard, H. & Elliott, E. J., 11 Apr 2017, In : Orphanet Journal of Rare Diseases. 12, 1, 9 p., 68.

Research output: Contribution to journalArticle

Open Access
28 Citations (Scopus)

Autism and intellectual disability are differentially related to sociodemographic background at birth

Leonard, H., Glasson, E., Nassar, N., Whitehouse, A., Bebbington, A., Bourke, J., Jacoby, P., Dixon, G., Malacova, E., Bower, C. & Stanley, F., 2011, In : PLoS One. 6, 3, p. e17875

Research output: Contribution to journalArticle

Open Access
64 Citations (Scopus)

Autism risk associated with parental age and with increasing difference in age between the parents

Sandin, S., Schendel, D., Magnusson, P., Hultman, C., Surén, P., Susser, E., GrØnborg, T., Gissler, M., Gunnes, N., Gross, R., Henning, M., Bresnahan, M., Sourander, A., Hornig, M., Carter, K., Francis, R., Parner, E., Leonard, H., Rosanoff, M., Stoltenberg, C. & 1 others, Reichenberg, A., 2016, In : Molecular Psychiatry. 21, 5, p. 693-700 8 p.

Research output: Contribution to journalArticle

Open Access
79 Citations (Scopus)

Autonomic breathing abnormalities in Rett syndrome: Caregiver perspectives in an international database study

MacKay, J., Downs, J., Wong, K., Heyworth, J., Epstein, A. & Leonard, H., 28 Apr 2017, In : Journal of Neurodevelopmental Disorders. 9, 1, 13 p., 15.

Research output: Contribution to journalArticle

Open Access
12 Citations (Scopus)

A validation study of a modified Bouchard activity record that extends the concept of 'uptime' to Rett syndrome

Lor, L., Hill, K., Jacoby, P., Leonard, H. & Downs, J., Dec 2015, In : Developmental Medicine and Child Neurology. 57, 12, p. 1137-1142

Research output: Contribution to journalArticle

Open Access
7 Citations (Scopus)
11 Citations (Scopus)

Birth seasonality and risk of autism spectrum disorder

Lee, B. K., Gross, R., Francis, R. W., Karlsson, H., Schendel, D. E., Sourander, A., Reichenberg, A., Parner, E. T., Hornig, M., Yaniv, A., Leonard, H. & Sandin, S., 15 Aug 2019, In : European Journal of Epidemiology. 34, 8, p. 785-792 8 p.

Research output: Contribution to journalArticle

Open Access
5 Citations (Scopus)

Bone mineral content and density in rett syndrome and their contributing factors

Jefferson, A. L., Woodhead, H. J., Fyfe, S., Briody, J., Bebbington, A., Strauss, B. J., Jacoby, P. & Leonard, H., 2011, In : Pediatric Research. 69, 4, p. 293-298

Research output: Contribution to journalArticle

26 Citations (Scopus)
11 Citations (Scopus)

Building the repertoire of measures of walking in Rett syndrome

Stahlhut, M., Downs, J., Leonard, H., Bisgaard, A. M. & Nordmark, E., 11 Sep 2017, In : Disability and Rehabilitation. 39, 19, p. 1926-1931 6 p.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Caesarean section and risk of autism across gestational age: a multi-national cohort study of 5 million births

Yip, B. H. K., Leonard, H., Stock, S., Stoltenberg, C., Francis, R. W., Gissler, M., Gross, R., Schendel, D. & Sandin, S., Apr 2017, In : International Journal of Epidemiology. 46, 2, p. 429-439 11 p.

Research output: Contribution to journalArticle

19 Citations (Scopus)

Caring for a child with severe intellectual disability in China: The example of Rett syndrome

Lim, F., Downs, J., Li, J., Bao, X-H. & Leonard, H., 2013, In : Disability and Rehabilitation. 35, p. 343-351

Research output: Contribution to journalArticle

7 Citations (Scopus)

CDK variants variant: Improving our understanding of a rare neurologic disorder

Hector, R. D., Kalscheuer, V. M., Hennig, F., Leonard, H., Downs, J., Clarke, A., Benke, T. A., Armstrong, J., Pineda, M., Bailey, M. E. S. & Cobb, S. R., Dec 2017, In : Neurology: Genetics. 3, 6, 10 p., 200.

Research output: Contribution to journalArticle

Open Access

Change in gross motor abilities of girls and women with rett syndrome over a 3- to 4-year period

Foley, K-R., Downs, J., Bebbington, A., Jacoby, P., Girdler, S., Kaufmann, W. E. & Leonard, H., 2011, In : Journal of Child Neurology. 26, 10, p. 1237-1245

Research output: Contribution to journalArticle

28 Citations (Scopus)