Sept 2019 The Hearing Journal

A new research has published the Victorian Childhood Hearing Impairment Longitudinal Databank (VicCHILD), which promises to help researchers across the globe in understanding why some children with hearing loss adapt and thrive better than others. The databank containing profiles children with hearing loss shows that language development and speech in hearing-impaired children are slower compared with the development of children with normal hearing, despite advancements in earlier detection and intervention in the past decade. Published in the latest International Journal of Epidemiology, the databank contains information collected over eight years. The paper's lead author, Murdoch Children's Research Institute's (MCRI) Dr. Valerie Sung, said that researchers world-wide can use the databank to answer questions around childhood hearing loss. "This register can help us understand why some children with a hearing loss do so well, while others experience greater difficulties," she says. "Universal newborn hearing screening is detecting hearing loss earlier than ever before, usually within a few weeks of birth. Children with hearing loss have very early access to hearing aids, early intervention services and for some, cochlear implantation. It was expected that hearing-impaired children would quickly come to enjoy the same language and educational outcomes as their hearing peers. However, early clinical diagnosis and intervention does not guarantee equality in health outcomes, with language and related outcomes of children with hearing loss remaining on average well below population means and the children's true cognitive potential. Demonstrating the reasons for this inequality has been hampered until now by the lack of population based prospective research."

VicCHILD is a population-based longitudinal databank open to every child with permanent hearing loss in Victoria, Australia. Data collection started in 2012 and stems from 25 years of work by The Royal Children's Hospital and MCRI. At the end 2018, 807 children were enrolled and provided baseline data. By 2020 more than 1000 children will be taking part, making it the largest hearing databank in the world. VicCHILD collects data at enrolment, two years of age, school entry and late primary /early high school. It involves parent questionnaires, child assessments and taking saliva samples.

Dr. Sung, who is also an honorary fellow at the University of Melbourne, says about 600 Australian infants each year are diagnosed with congenital hearing loss within weeks of birth. "As these children grow, they can face challenges in things that come naturally to others like language and learning. This can impact their quality of life," she says. "Hearing loss incurs significant burden and medical costs and impacts adversely on educational attainment and employment opportunities.

"This important bank of information could improve interventions and ultimately the lives of children with hearing loss and their families. It will also act as a platform for research trials to understand the effectiveness of different interventions."

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