Nitrate fertilizers as environmental pollutants: Positive correlation between nitrates (NaNO3 and KNO3) used per unit area and stomach cancer mortality rates

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Abstract
Since a significant positive correlation between nitrate fertilizer exposure and stomach cancer mortality has been found, a study of nitrate fertilizer pollution in arable land in terms of amount of nitrates used per unit area (kg/ha) and stomach cancer death rates was carried out. The regression of death rates for stomach cancer, standardized for age, on the nitrates used per unit area, by province (N=25), exhibited a significant association between the 2 variables (pN=3) were not considered, a highly significant association was found (F=16.47; d.f.=1,20;p<0.0006). The correlation coefficient was+0.672.