据近年来流行病学资料,我省恒曲县食管癌、胃癌的调整死亡率分别为84.46/10万及76.42/10万属省内这两种疾病的高发区之一。山西北部的灵邱县则相反,其食管癌、胃癌的调整死亡率分别低为7.19/10万及8.42/10万。为了了解食管癌、胃癌死亡率这一显著的地区差异,同时由于硝酸盐和亚 According to epidemiological data in recent years, the adjusted mortality rates of esophageal cancer and gastric cancer in Hengqu County were 84.46/100,000 and 76.42/100,000 respectively, which is one of the high-risk areas for these two diseases in the province. In Lingqiu County in northern Shanxi Province, on the contrary, the adjusted mortality rates for esophageal cancer and gastric cancer were respectively 7.19/100,000 and 8.42/100,000. In order to understand the significant regional differences in mortality from esophageal and gastric cancers, due to nitrates and sub-