Influence of Standardized Deep Well Water on Morbidity and Mortality of Esophageal Cancer in Linzhou / 环境与健康杂志

ABSTRACT

Objective To observe the influence of standardized deep well water on mortality and morbidity of esophageal cancer (EC) in Linzhou. In order to test the hypothesis of "nitrogenous compound metabolised cycling" in etiology of EC. Methods Based on the investigation data collected in 1999 among which some data were from Linzhou Institute of Prevention and Treatment of EC. Three kinds of water were included, standardized deep well water(SDWW) from the well with the depth exceeding 100 meters ,finished time exceeding 6 years; unstandardized deep well water(UDWW) and mountain spring water(MSW). The mortality and morbidity of EC in the the related population. Results There were 281 458 villagers of 165 villages to drink SDWW, 183 289 villagers of 129 villages to drink UDWW and 45 274 villagers of 50 villages to drink MSW. The morbidity and mortality of EC significantly decreased in residents who drank the SDWW compared with those who drank the UDWW and MSW, P