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Japanese Journal of Cancer Research : Gann logoLink to Japanese Journal of Cancer Research : Gann
. 1998 Feb;89(2):124–130. doi: 10.1111/j.1349-7006.1998.tb00539.x

Calcium, Magnesium, and Nitrate in Drinking Water and Gastric Cancer Mortality

Chun‐Yuh Yang 1,✉, Ming‐Fen Cheng 1, Shang‐Shyue Tsai 1, Ya‐Lun Hsieh 1
PMCID: PMC5921760  PMID: 9548438

Abstract

The possible association between the risk of gastric cancer and the levels of calcium, magnesium, and nitrate in drinking water from municipal supplies was investigated in a matched case‐control study in Taiwan. Records of gastric cancer deaths among eligible residents in Taiwan from 1987 through 1991 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 sex, year‐of‐birth, and year‐of‐death. Each matched control was selected randomly from the set of possible controls for each case. Data on calcium, magnesium, and nitrate levels in drinking water throughout Taiwan were obtained from the Taiwan Water Supply Corporation. The municipality of residence of the cases and controls was assumed to be the source of the subject's calcium, magnesium, and nitrate exposure via drinking water. The subjects were divided into tertiles according to the levels of calcium, magnesium, and nitrate in their drinking water. The results of the present study show that there is a significant positive association between drinking water nitrate exposure and gastric cancer mortality. The present study also suggests that there was a significant protective effect of calcium intake from drinking water on the risk of gastric cancer. Magnesium also exerts a protective effect against gastric cancer, but only for the group with the highest levels.

Keywords: Gastric cancer, Drinking water, Calcium, Magnesium, Nitrate

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