Relationship between water hardness and coronary mortality in Taiwan.

A number of studies carried out in other countries have shown the existence of negative correlations between coronary mortality and the hardness of water supplies. Data on water hardness throughout Taiwan have been collected from Taiwan Water Supply Corporation (TWSC) to examine the ecological correlation between deaths from coronary disease (1981-1990) and total hardness in drinking water. Analysis demonstrates a significant negative association between drinking water hardness and coronary mortality. After adjustment for the urbanization index, coronary mortality in municipalities with soft water was estimated to be 9.6% higher than that in municipalities with hard water. The weighted multivariate-adjusted regression coefficient indicated a decrease of 0.053 in standardized mortality ratios (SMRs) for every 100 mg/L increase in total hardness in drinking water after allowing for the urbanization condition.

[1]  H. Boström,et al.  On the relationship between water hardness and death rate in cardiovascular diseases. , 2009, Acta medica Scandinavica.

[2]  V Leoni,et al.  Water hardness and cardiovascular mortality rate in Abruzzo, Italy. , 1985, Archives of environmental health.

[3]  J. Feldman,et al.  Plan and operation of the NHANES I Epidemiologic Followup Study, 1992. , 1997, Vital and health statistics. Ser. 1, Programs and collection procedures.

[4]  R. F. Packham,et al.  British Regional Heart Study: geographic variations in cardiovascular mortality, and the role of water quality , 1980, British medical journal.

[5]  J. Madans,et al.  Regional and urban-suburban differentials in coronary heart disease mortality and risk factor prevalence. , 1981, Journal of chronic diseases.

[6]  Andrew C. Middleton,et al.  Chemical Aspects of the Relationship Between Drinking Water Quality and Long‐Term Health Effects: An Overview , 1979 .

[7]  J. N. Morris,et al.  Hardness of local water-supplies and mortality from cardiovascular disease in the County Boroughs of England and Wales. , 1961, Lancet.

[8]  S J Pocock,et al.  Regression of area mortality rates on explanatory variables: what weighting is appropriate? , 1981, Journal of the Royal Statistical Society. Series C, Applied statistics.

[9]  L. Neri,et al.  WATER HARDNESS AND CARDIOVASCULAR MORTALITY , 1978, Annals of the New York Academy of Sciences.

[10]  S. Zoloth,et al.  Does low-level lead exposure increase risk of death? A mortality study of newspaper printers. , 1991, International journal of epidemiology.

[11]  J Schwartz,et al.  Lead, blood pressure, and cardiovascular disease in men. , 1995, Archives of environmental health.

[12]  T. Kristensen,et al.  Blood lead as a cardiovascular risk factor. , 1992, American journal of epidemiology.

[13]  R. F. Packham,et al.  Studies of water quality and cardiovascular disease in the United Kingdom. , 1981, Science of the Total Environment.

[14]  R. Gillum,et al.  Regional and urbanization differentials in coronary heart disease mortality in the United States, 1968-85. , 1989, Journal of clinical epidemiology.

[15]  H. Tunstall-Pedoe,et al.  Unemployment, socioenvironmental factors, and coronary heart disease in Scotland. , 1989, British heart journal.

[16]  J. Kobayashi.  ON GEOGRAPHICAL RELATIONSHIP BETWEEN THE CHEMICAL NATURE OF RIVER WATER AND DEATH-RATE FROM APOPLEXY (Preliminary Report) , 1957 .

[17]  R Rylander,et al.  Magnesium and calcium in drinking water and cardiovascular mortality. , 1991, Scandinavian journal of work, environment & health.

[18]  E. F. Perry,et al.  Cadmium and lead effects on myocardial function and metabolism. , 1980, Journal of environmental pathology and toxicology.

[19]  K. Mizukoshi,et al.  Mortality of inhabitants in an area polluted by cadmium: 15 year follow up. , 1995, Occupational and environmental medicine.