thach

My research interests cover the development and application of epidemiological and statistical methods required for assessing the environment and health problems and analysing the data. They are mainly focused on health risks of air pollution, but also include the impacts of weather and climate change on health. Specific methodological research includes distributed lag effects of time series model, and design of case crossover studies in air pollution and health. Current substantive research topics of interest, on which I work in collaboration with colleagues in the Department of Community Medicine/School of Public Health, focus on estimating loss of life expectancy attributable to air pollution and the benefit due to the restriction on sulphur content in fuel in Hong Kong, and the impacts of poor visibility as well as thermal stress on health risks. My early work has been related to analysis of cancer data, in particular for breast cancer where I used age period cohort model to quantify the incidence in Hong Kong.