MBBS (Shanxi Med Univ), MSc (China CDC), PhD (UC Berkeley)
Division of Epidemiology and Biostatistics
Dr. Tian is an environmental epidemiologist with a focus on air pollution and health. He has been conducting field epidemiology and laboratory work on indoor air pollution and lung cancer in Xuan Wei County, which has the highest lung cancer rates among women in China. Using spatial analysis of coal use patterns and lung cancer rates in hundreds of villages, he has raised the hypothesis that crystalline silica (quartz) in coal smoke is an important risk factor in the lung cancer epidemic in rural Xuan Wei. Currently he is working to quantify quartz and other carcinogens in coal smoke and to determine whether an exposure-response relationship can be found. Should such a linkage be found he would advocate a ban of certain types of toxic coals for residential use in China. Further, he would identify reference carcinogenic materials in coal smoke for further laboratory carcinogenesis studies.
Urbanized Hong Kong provides another unique setting to study air pollution and health. Its high density of people and vehicles, high-rise buildings, a rich resource of accessible environmental measurement and healthcare data, and various air pollution control policies offers a great opportunity for valuable environmental epidemiology. Dr. Tian has completed exploratory analysis of publicly available data at the population level and has generated interesting hypotheses relating adverse health outcomes which may be impacted by the Hong Kong’s pollutants and sources. Analytical studies which include personal exposure and biomarker measurements will be conducted to further test these hypotheses, infer possible causal relationships, and to inform risk-based air quality control policies.
Tian LW*, Ho KF, Wang T, Qiu H, Pun VC, Chan JC, Louie PKK, Yu ITS. Ambient carbon monoxide and the risk of hospitalization due to chronic obstructive pulmonary disease. American Journal of Epidemiology. 2014;180(12):1159-1167. [link]
Qiu H, Tian LW*, Pun VC, Ho KF, Wong TW, Yu ITS. Coarse particulate matter associated with increased risk of emergency hospital admissions for pneumonia in Hong Kong. Thorax. 2014; 69(11):1027-1033. [link]
Pun VC, Yu ITS, Qiu H, Ho KF, Sun ZW, Louie PKK, Wong TW, and Tian LW*. Short-Term Associations of Cause-Specific Emergency Hospitalizations and Particulate Matter Chemical Components in Hong Kong. American Journal of Epidemiology. 2014;179(9):1086-1095. [link]
Pun VC, Yu ITS, Ho KF, Qiu H, Sun ZW, and Tian LW*. Differential Effects of Ambient Source-Specific Particulate Matter on Ischemic Heart Disease Emergency Hospitalizations. Environmental Health Perspectives. 2014;122(4):391-6. [link]
Tian LW*, Qiu H, Pun VC, Lin HL, Ge EJ, Chan JC, Louie PK, Ho KF, and Yu ITS. Ambient Carbon Monoxide Associated with Reduced Risk of Hospital Admissions for Respiratory Tract Infections. American Journal of Respiratory and Critical Care Medicine. 2013;188(10):1240-5. [link]
Tian LW*, Ho KF, Louie PK, Qiu H, Pun VC, Kan H, Yu IT, and Wong TW. Shipping Emissions Associated with Increased Cardiovascular Hospitalizations. Atmospheric Environment. 2013;74:320-5. [link]
Tian LW*, Hossain SR, Lin H, Ho KF, Lee SC, and Yu ITS. Increasing trend of primary NO2 exhaust emission fraction in Hong Kong. Environmental Geochemistry and Health. 2011;33:623–630. [link]
Tian LW*, Koshland CP, Yano J, Yachandra VK, Yu ITS, Lee SC, and Lucas D. Carbon-Centered Free Radicals in Particulate Matter Emissions from Wood and Coal Combustion. Energy & Fuels. 2009;23:2523–2526. [link]
Tian LW*, Bi Y, Ho SC, Liu W, Liang S, Goggins WB, Chan EYY, Zhou S, and Sung JJY. One-year delayed effect of fog on malaria transmission: a time-series analysis in the rain forest area of Mengla County, south-west China. Malaria Journal. 2008;7:110. [link]
Tian LW, Lucas D*, Fischer SL, Lee SC, and Koshland CP. Particle and gas emissions from a simulated coal-burning household fire pit. Environmental Science & Technology. 2008;42:2503–2508. [link]