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Chun-yuh Yang - One of the best experts on this subject based on the ideXlab platform.

  • Trihalomethanes in Drinking Water and the risk of death from esophageal cancer: does hardness in Drinking Water matter?
    Journal of toxicology and environmental health. Part A, 2013
    Co-Authors: Shang-shyue Tsai, Hui-fen Chiu, Chun-yuh Yang
    Abstract:

    The objectives of this study were to (1) examine the relationship between total trihalomethanes (TTHM) levels in public Water supplies and risk of esophageal cancer occurrence and (2) determine whether calcium (Ca) and magnesium (Mg) levels in Drinking Water modify the effects of TTHM on risk to develop esophageal cancer. A matched case-control study was used to investigate the relationship between the risk of death attributed to esophageal cancer and exposure to TTHM in Drinking Water in 53 municipalities in Taiwan. All esophageal cancer deaths in the 53 municipalities from 2006 through 2010 were obtained from the Bureau of Vital Statistics of the Taiwan Provincial Department of Health. Controls were deaths from other causes and were pair-matched to the cancer cases by gender, year of birth, and year of death. Each matched control was selected randomly from the set of possible controls for each cancer case. Data on TTHM levels in Drinking Water were collected from Taiwan Environmental Protection Administration. Information on the levels of Ca and Mg in Drinking Water was obtained from the Taiwan Water Supply Corporation. The municipality of residence for cancer cases and controls was presumed to be the source of the subject's TTHM, Ca, and Mg exposure via Drinking Water. Relative to individuals whose TTHM exposure level

  • Does calcium in Drinking Water modify the association between nitrate in Drinking Water and risk of death from colon cancer
    Journal of water and health, 2011
    Co-Authors: Hui-fen Chiu, Pei-shih Chen, Shang-shyue Tsai, Chun-yuh Yang
    Abstract:

    The objective of this study was to explore whether calcium (Ca) levels in Drinking Water modified the effects of nitrate on colon cancer risk. A matched case-control study was used to investigate the relationship between the risk of death from colon cancer and exposure to nitrate in Drinking Water in Taiwan. All colon cancer deaths of Taiwan residents from 2003 through 2007 were obtained from the Bureau of Vital Statistics of the Taiwan Provincial Department of Health. Controls were deaths from other causes and were pair-matched to the cases by gender, year of birth and year of death. Information on the levels of nitrate-nitrogen (NO(3)-N) and Ca in Drinking Water have been collected from Taiwan Water Supply Corporation (TWSC). The municipality of residence for cases and controls was assumed to be the source of the subject's NO(3)-N and Ca exposure via Drinking Water. We observed evidence of an interaction between Drinking Water NO(3)-N and Ca intake via Drinking Water. This is the first study to report effect modification by Ca intake from Drinking Water on the association between NO(3)-N exposure and risk of colon cancer mortality.

  • Nitrates in Drinking Water and the risk of death from rectal cancer: does hardness in Drinking Water matter?
    Journal of toxicology and environmental health. Part A, 2010
    Co-Authors: Chih-ching Chang, Chih-cheng Chen, Chun-yuh Yang
    Abstract:

    The objectives of this study were to (1) examine the relationship between nitrate levels in public Water supplies and increased risk of death from rectal cancer and (2) determine whether calcium (Ca) and magnesium (Mg) levels in Drinking Water might modify the effects of nitrate on development of rectal cancer. A matched case-control study was used to investigate the relationship between the risk of death from rectal cancer and exposure to nitrate in Drinking Water in Taiwan. All rectal cancer deaths of Taiwan residents from 2003 through 2007 were obtained from the Bureau of Vital Statistics of the Taiwan Provincial Department of Health. Controls were deaths from other causes and were pair-matched to the cases by gender, year of birth, and year of death. Information on the levels of nitrate-nitrogen (NO(3)-N), Ca, and Mg in Drinking Water was collected from Taiwan Water Supply Corporation (TWSC). The municipality of residence for cancer cases and controls was presumed to be the source of the subject's NO(3)-N, Ca, and Mg exposure via Drinking Water. Relative to individuals whose NO(3)-N exposure level was or =0.38 ppm. There was no apparent evidence of an interaction between Drinking Water NO(3)-N levels with low Mg intake via Drinking Water. However, evidence of a significant interaction was noted between Drinking-Water NO(3)-N concentrations and Ca intake via Drinking Water. Our findings showed that the correlation between NO(3)-N exposure and risk of rectal cancer development was influenced by Ca in Drinking Water. This is the first study to report effect modification by Ca intake from Drinking Water on the association between NO(3)-N exposure and risk of rectal cancer occurrence. Increased knowledge of the mechanistic interaction between Ca and NO(3)-N in reducing rectal cancer risk will aid in public policymaking and setting threshold standards.

  • Trihalomethanes in Drinking Water and the risk of death from rectal cancer: does hardness in Drinking Water matter?
    Journal of toxicology and environmental health. Part A, 2010
    Co-Authors: Hsin-wei Kuo, Pei-shih Chen, Li-yu Wang, Chun-yuh Yang
    Abstract:

    The objectives of this study were (1) to examine the relationship between total trihalomethanes (TTHM) levels in public Water supplies and risk of rectal cancer development and (2) to determine whether calcium (Ca) and magnesium (Mg) levels in Drinking Water might modify the effects of TTHM on risk of developing rectal cancer. A matched cancer case-control study was used to investigate the relationship between the risk of death attributed to rectal cancer and exposure to TTHM in Drinking Water in 53 municipalities in Taiwan. All rectal cancer deaths in the 53 municipalities from 1998 through 2007 were obtained from the Bureau of Vital Statistics of the Taiwan Provincial Department of Health. Controls were deaths from other causes and were pair-matched to cancer cases by gender, year of birth, and year of death. Each matched control was selected randomly from the set of possible controls for each cancer case. Data on TTHM levels in Drinking Water were collected from the Taiwan Environmental Protection Administration. Information on the levels of Ca and Mg in Drinking Water was obtained from the Taiwan Water Supply Corporation. The municipality of residence for cancer cases and controls was presumed to be the source of the subject's TTHM, Ca, and Mg exposure via Drinking Water. Relative to individuals whose TTHM exposure level was or=4.9 ppb. There was no evidence of an interaction of Drinking-Water TTHM levels with low Ca intake via Drinking Water. However, evidence of an interaction was noted between Drinking-Water TTHM concentrations and Mg intake via Drinking Water. Our findings showed that the correlation between TTHM exposure and risk of rectal cancer is influenced by Mg in Drinking Water. Increased knowledge of the interaction between Mg and TTHM in reducing rectal cancer risk will aid in public policymaking and standard setting.

Emma H Goslan - One of the best experts on this subject based on the ideXlab platform.

Fan Wei-wei - One of the best experts on this subject based on the ideXlab platform.

  • Drinking Water quality after implementation of rural Drinking Water safety project in Shijiazhuang city
    Chinese Journal of Public Health, 2011
    Co-Authors: Fan Wei-wei
    Abstract:

    Objective To understand Drinking Water quality after the implementation of rural Drinking Water safety project in Shijiazhuang city and to provide scientific evidence for making decision.Methods Drinking Water samples were collected and tested in 17 counties with Drinking Water supply system of rural Drinking Water safety project in 2008-2009 in Shijiazhuang city.The sampling and testing were conducted in dry season(March to May) and wet period(July to September).Results Among 330 rural Drinking Water supply systems investigated,only 6.06% had qualified Water treatment equipment and 87.27% had no disinfection equipment.The hygienic qualification rate was 80.61% and 80.00% for out-Water of the Water plants and tap Water.The qualification rates of the Water samples were more than 95% for physical,chemical,and toxicologic indicators.But the microlial indicators was under the national standard.Conclusion The rural Drinking Water treatment works in Shijiazhuang city need to be improved,especially for disinfection facility.

K Clive Thompson - One of the best experts on this subject based on the ideXlab platform.

Gary Mihlan - One of the best experts on this subject based on the ideXlab platform.

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