Low-yield Cigarettes And Diminution Of Small Airways Lung Function In Long-term Smokers
Funder
National Health and Medical Research Council
Funding Amount
$209,500.00
Summary
The modern cigarette has been designed to produce low yields of tar when the tobacco in the cigarette is burnt. The tar contains human carcinogens, and monitoring and regulating yields of tar has long been part of the comprehensive tobacco control strategy in Australia. This focus on tar has given an implicit endorsement of the low-yield cigarette as a safer cigarette. Recently, however, controversy has emerged about whether smoking low-yield cigarettes has reduced the harm done by smoking. The ....The modern cigarette has been designed to produce low yields of tar when the tobacco in the cigarette is burnt. The tar contains human carcinogens, and monitoring and regulating yields of tar has long been part of the comprehensive tobacco control strategy in Australia. This focus on tar has given an implicit endorsement of the low-yield cigarette as a safer cigarette. Recently, however, controversy has emerged about whether smoking low-yield cigarettes has reduced the harm done by smoking. The concern is that adenocarcinoma of the lung, a type of lung cancer that is most common in the small peripheral airways, has increased in frequency. This could be because the low-yield cigarette, with reduced yields of nicotine as well as tar, is smoked more intensely by smokers to compensate for the low nicotine. By smoking more intensely, we mean taking larger and more frequent puffs, inhaling the smoke deeply into the lungs, and holding the breath before expiring. This method of smoking would result in more tar particles being deposited in the peripheries of the lung where adenocarcinoma is most common. Because cigarette smoking has been linked also with other structural changes in the small airways of the lung, resulting in obstruction of airflow, we will test whether smoking low-yield cigarettes is associated with greater obstruction of the small airways than is smoking higher-yield cigarettes. To test whether the mechanism is the method of smoking, we will carefully describe and quantify each subject's pattern of smoking including the deposition of smoke-like Technegas particles in the peripheral lung.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
Trials To Prevent The Transmission And Complications Of Sexually Transmitted Infections, Including HIV
Funder
National Health and Medical Research Council
Funding Amount
$306,123.00
Summary
Sexually transmitted infections (STIs) are important causes of illness in some sectors of the community. Even though they can be effectively prevented and treated, many health services do not give them priority. This research project will study ways in which general practitioners can better diagnose and treat STIs. We will carry out trials that compare new approaches to supporting doctors in this area, that involve a mixture of training, reminders and technical support as needed.
Melanoma Diagnosis, And The Effect Of Screening On Depth Of Invasion Of Melanoma.
Funder
National Health and Medical Research Council
Funding Amount
$399,961.00
Summary
AIMS This study will assess how melanoma is diagnosed in Queensland, and if improvements can be made. It will assess if skin screening gives earlier diagnosis of some melanomas, and also if it leads to the diagnosis of some thin melanomas which would not progress if left alone. SIGNIFICANCE Melanoma is the most common invasive cancer in Queensland, with some 1,963 people diagnosed annually with the disease. The outlook for these patients varies dramatically with the depth of invasion of melanoma ....AIMS This study will assess how melanoma is diagnosed in Queensland, and if improvements can be made. It will assess if skin screening gives earlier diagnosis of some melanomas, and also if it leads to the diagnosis of some thin melanomas which would not progress if left alone. SIGNIFICANCE Melanoma is the most common invasive cancer in Queensland, with some 1,963 people diagnosed annually with the disease. The outlook for these patients varies dramatically with the depth of invasion of melanoma. Melanoma diagnosed and treated when very thin has an excellent long-term outcome, whereas the outcome for deeply invasive melanoma is much less favourable. Improvements to diagnosis are currently our best hope of reducing deaths and serious distress from this disease. This will be the largest study in the world of the process of diagnosis of melanoma: information on how melanoma presents, and the time between presentation and diagnosis will be compared between thin and deeply invasive melanoma. Results may indicate areas for improvement in education or health services. The use of screening, either by individuals themselves or by health professionals, has the potential to achieve early diagnosis. However, there is currently no good information on whether screening is actually effective. This study will assess the impact of self-screening and doctor screening on the depth of invasion of melanoma at presentation, and ultimately on the likelihood of dying from melanoma. The study will also assess the potential impact of screening on the over-diagnosis of lesions which while labeled as melanoma, may in fact be biologically non-progressive. This is an important issue of current concern internationally. This study will be one of only two studies in the world currently addressing this issue. This project is directly relevant to the early detection and optimum management of the most common invasive cancer in Queensland, and will have relevance internationally.Read moreRead less
This study will follow up over 12,000 men aged 65-83 years who have previously completed a questionnaire about their medical, social, family and occupational history and lifestyle and have undergone a simple physical examination (height, weight, waist, girth at the hips and blood pressure). The first aim is to determine which of these factors predicts serious ill-health from heart disease, stroke and certain cancers in old age. In addition, we will test the hypothesis that risk factors for heart ....This study will follow up over 12,000 men aged 65-83 years who have previously completed a questionnaire about their medical, social, family and occupational history and lifestyle and have undergone a simple physical examination (height, weight, waist, girth at the hips and blood pressure). The first aim is to determine which of these factors predicts serious ill-health from heart disease, stroke and certain cancers in old age. In addition, we will test the hypothesis that risk factors for heart disease also predict the development of dementia because it seems that part of dementia in some patients is explained by their having suffered multiple small strokes. Finally, we will examine the relationship between development of dementia and previous major surgery as there is growing evidence that major surgical operations in older patients can be followed by confusion and impairment of thinking that may never recover fully. The overall aim is to discover preventable factors for several of the leading causes of ill-health in old age.Read moreRead less
A Case-control Study Of Environment And Breast Cancer
Funder
National Health and Medical Research Council
Funding Amount
$808,948.00
Summary
Breast cancer is the most common cancer in Australian women and there have been a number of recent events which have raised public concern that occupational exposures are contributing to the increasing occurrence of this cancer. In this study, we will investigate occupational causes of breast cancer, particularly shift work, industrial solvent use and combustion products. We will compare occupations of 1000 women with breast cancer and 2000 women without cancer.
Infections, Inflammatory Markers And Prostate Cancer Risk
Funder
National Health and Medical Research Council
Funding Amount
$731,217.00
Summary
Prostate cancer is the leading cancer for Australian men but apart from getting older and having a family history of prostate cancer we do not know what causes it and nothing can be done to prevent it. This project follows up recent suggestions that some prostate cancer might be due to infections by bacteria and viruses. We will look for evidence of infection in blood samples and prostate tissue that we have collected from men with prostate cancer and from controls without prostate cancer.
Metabolic Syndrome, Inflammation And Non-alcoholic Fatty Liver Disease In Busselton
Funder
National Health and Medical Research Council
Funding Amount
$351,300.00
Summary
The metabolic syndrome is a clustering of obesity, insulin resistance, high cholesterol and high blood pressure. It could affect up to 30% of the population and often leads to diabetes and heart disease. Fatty liver disease is a chronic liver condition that often has no symptoms but can lead to serious liver damage. It could affect up to 25% of the population and is common even in people who drink very little alcohol. The rising prevalence of obesity in Australia suggests that the metabolic synd ....The metabolic syndrome is a clustering of obesity, insulin resistance, high cholesterol and high blood pressure. It could affect up to 30% of the population and often leads to diabetes and heart disease. Fatty liver disease is a chronic liver condition that often has no symptoms but can lead to serious liver damage. It could affect up to 25% of the population and is common even in people who drink very little alcohol. The rising prevalence of obesity in Australia suggests that the metabolic syndrome and fatty liver disease may be on the increase and therefore so too could diabetes and heart disease which already consume significant health resources. Using the unique health data collection of the Busselton Health Study in Western Australia, this project will help to determine how common these conditions are in Australia and lead to a better understanding of the nature and causes of these conditions including the possible role of chronic inflammation. This important information will be used to provide opportunities for better risk assessment, disease prevention, and earlier intervention.Read moreRead less
The Real And Changing Atherothrombotic Disease Burden And Secondary Prevention
Funder
National Health and Medical Research Council
Funding Amount
$507,387.00
Summary
Absolute numbers of Australians with diseased narrowed blood vessels in the heart, brain or leg are increasing, dominating health priorities and expenditure. By linking Department of Health datasets, without identifying individual's, trends in hospital admissions, prescription of chronic protective medications and the cost consequences to the health system among and across conditions will be determined. The findings will provide quality measures of hospital care and inform quality improvement