Early Predictors And Body Composition Changes Associated With Adiposity Rebound
Funder
National Health and Medical Research Council
Funding Amount
$201,650.00
Summary
Overweight and obesity rates are increasing in children, and overweight children have higher risk of adult obesity and therefore diseases including heart attack, stroke and diabetes. The preschool years may offer opportunities to divert children from the path to obesity, before poor physical activity and nutritional habits become firmly established. Adiposity rebound is the time in a child's life (usually around 5 to 6 years of age) when body mass index (BMI) begins to increase after a steady de ....Overweight and obesity rates are increasing in children, and overweight children have higher risk of adult obesity and therefore diseases including heart attack, stroke and diabetes. The preschool years may offer opportunities to divert children from the path to obesity, before poor physical activity and nutritional habits become firmly established. Adiposity rebound is the time in a child's life (usually around 5 to 6 years of age) when body mass index (BMI) begins to increase after a steady decline in BMI in the preschool years. Early adiposity rebound is associated with increased BMI in later life. We don't yet know whether the early adiposity rebound causes the higher BMI, or whether it is simply an early sign of an already-established pathway of behavioural and environmental risk. We need a much better understanding of predictors of early adiposity rebound and the changes that occur to determine if age at adiposity rebound is a modifiable risk factor for adult obesity. This study will document the process and timing of adiposity rebound and the changes in percent body fat and lean body mass that occur during that time. We will also determine whether risk and protective factors for early adiposity rebound and overweight at age 6 years are the same or different. We will study over 400 children on whom extensive data have been collected since birth, including period of gestation, birth weight and length. At various stages during their first two years of life, height, weight, feeding patterns and development were recorded. We will measure BMI and perform bioimpedance analysis (BIA) on these children six times between 4 and 6 years of age. BIA provides a measure of body fat and lean mass that is well accepted by children. This will help determine the relationship between changing BMI at different ages and the fat-to-lean mass ratios associated with those changes. This study is the first to consider body composition changes during adiposity rebound.Read moreRead less
The Role Of Past Sun Exposure, Infection History And Other Exogenous Factors In Multiple Sclerosis
Funder
National Health and Medical Research Council
Funding Amount
$92,011.00
Summary
Multiple Sclerosis (MS) is a chronic autoimmune inflammatory disease of the brain and spinal cord that leads to various degrees of disability. The causes of MS are not yet known, and there is presently no cure. However, there is strong evidence that both an inherited susceptibility and environmental factors are important. This environmental case control study will be conducted in Tasmania and will run concurrent to a genetic project on MS which allows assessment of gene-environment interactions. ....Multiple Sclerosis (MS) is a chronic autoimmune inflammatory disease of the brain and spinal cord that leads to various degrees of disability. The causes of MS are not yet known, and there is presently no cure. However, there is strong evidence that both an inherited susceptibility and environmental factors are important. This environmental case control study will be conducted in Tasmania and will run concurrent to a genetic project on MS which allows assessment of gene-environment interactions. It focuses on infections, timing of childhood infections and long term sun exposure. It has been suggested that MS may be due to an immune disturbance following viral infection and that the timing of childhood infections may be initially important. Also, in Australia, there is a sevenfold increase in MS prevalence as one moves from Queensland to Tasmania. This latitudinal gradient might be due to ultra violet radiation, through an influence on immune function. Beside those main focuses, the study will include other environmental factors like chemicals, diet and vaccinations. Hopefully this project will contribute to a better understanding of the causes of MS, which are relevant for preventative strategies and devising optimal treatment.Read moreRead less
Cancer And Low-dose Radiation - Possible Effects Of CT Scans In Childhood
Funder
National Health and Medical Research Council
Funding Amount
$476,650.00
Summary
Despite 100 years of research there is uncertainty about effects of low dose radiation from background and medical X-rays. We will measure the incidence of cancer in Australians exposed to CT scans (medical X-rays) as children between 1985 and 2005. Our results, from follow-up to 2009, will show whether there is a small but signicantly increased risk of cancer and guide further improvement in radiation safety standards if these prove to be necessary.
Prof Lynch is an epidemiologist interested in understanding, quantifying, developing, and applying the evidence base for universal, targeted and clinical population health interventions, particularly in early life, that will improve overall population health and reduce health inequalities.
Hospital Admission, Cerebral Palsy, Intellectual Disability And Birth Defects In Assisted Conception Infants.
Funder
National Health and Medical Research Council
Funding Amount
$115,110.00
Summary
We have recently completed a study examining the prevalence of birth defects in assisted conception infants born in Western Australia from 1993-1997. Contrary to reassuring claims by other researchers in this area, we found that assisted conception infants have a two-fold increased risk of being diagnosed with a major birth defect by one year of age. We now propose to examine other long-term health outcomes in these children. This study involves record linkage between the WA Reproductive Technol ....We have recently completed a study examining the prevalence of birth defects in assisted conception infants born in Western Australia from 1993-1997. Contrary to reassuring claims by other researchers in this area, we found that assisted conception infants have a two-fold increased risk of being diagnosed with a major birth defect by one year of age. We now propose to examine other long-term health outcomes in these children. This study involves record linkage between the WA Reproductive Technology Register and four other population-based databases. The prevalence of cerebral palsy, intellectual disability, hospital admission and birth defects in assisted conception children born in WA between 1993 and 2001 will be compared to that seen in all other Western Australian children born over the same time period. The collection of information on risks associated with assisted conception treatment is vital to allow adequate counselling of couples considering fertility treatment. Cerebral palsy, intellectual disability, birth defects and hospital admission are all serious adverse health outcomes and, despite the introduction of IVF to most Western countries twenty years ago, there are limited data in the literature concerning the occurrence of these conditions in assisted conception infants. Quantifying the contribution of assisted conception treatment to neonatal, infant and childhood morbidity and mortality is also important for the planning of health service provision. Although assisted conception births represent only a small proportion of total births in Australia, these infants may require a disproportionate level of health care services, such as neonatal intensive care treatment due to complications associated with preterm or multiple birth. The wide application of assisted conception treatment in Australia and the increased number of pregnancies achieved by these means reinforce the urgent need for valid data on the health of children born after these procedures.Read moreRead less
Environmental And Genetic Factors In Childhood Acute Lymphoblastic Leukaemia: A Case-control Study.
Funder
National Health and Medical Research Council
Funding Amount
$1,788,500.00
Summary
In most countries, acute lymphoblastic leukaemia is the commonest cancer in children. One in 2000 children will develop this disease before their 15th birthday. New methods of treatment introduced over the last 30 years have resulted in cure for many children. However, one third of children diagnosed with this type of leukaemia still die and, even in those whose lives are saved, cure is achieved at a significant cost to the child, the family and the community. Greater understanding of the develo ....In most countries, acute lymphoblastic leukaemia is the commonest cancer in children. One in 2000 children will develop this disease before their 15th birthday. New methods of treatment introduced over the last 30 years have resulted in cure for many children. However, one third of children diagnosed with this type of leukaemia still die and, even in those whose lives are saved, cure is achieved at a significant cost to the child, the family and the community. Greater understanding of the development of childhood leukaemia may lead to preventive measures. Most children with this type of leukaemia are very young, suggesting that factors to which parents are exposed may affect future children. For this reason, as well as investigating the health and lifestyle of the child, it is essential to study the parents. Recent research suggests an association between the mother's intake of folate during pregnancy and her child's risk of developing the most common type of childhood leukaemia. It is also apparent that genetic differences result in varying abilities to deal with toxins, which may alter the risk of developing some cancers. Diet and lifestyle probably also affect this risk. These observations and interactions need to be examined in greater detail. In this large Australia-wide study specific genes will, for the first time, be examined and analysed in conjunction with rigorous assessment of exposures thought to be related to the development of childhood leukaemia. Results obtained from children with leukaemia and their parents will be compared with those from healthy children and their parents. This study is unique in its attempt to assess gene-environment interactions in Australian children and their parents. It will clarify the role of folate and other potential environmental agents in the development of childhood leukaemia and examine gene variations that may affect cancer risk.Read moreRead less
SES And Injury In Children: A Cohort Study To Identify And Measure The Effects Of Preventable Mediating Factors
Funder
National Health and Medical Research Council
Funding Amount
$360,505.00
Summary
While changing an individual or group SES is at best a long term and challenging social objective, proximal risk factors for injury can be more readily modified. Once the proximal risk factor differential across SES groups has been adequately delineated, then the possibility arises for targeted public health intervention to redress the SES differential in the incidence of injury. The sophistication of the proposed modeling will result in a good assessment of the best point to target.