However, males with high cumulative exposure to nitrogen oxides (>40 unit-years) showed a twofold increase in gastric cancer mortality, and a marginally significant trend was shown for both genders.
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Fertilizers and Human Health-A Systematic Review of the Epidemiological Evidence.
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The sentences
They found a marginally statistically significant association between farmers who were fertilizer applicants in the highest intensity county strata compared with non-farmers who lived in the counties with the lowest intensity (OR = 1.7, 95% CI 1.0 to 2.9).