林州市饮用不同地下水居民食管癌发病现状调查

目的　探讨林州市饮用不同地下水居民食管癌发病现状。方法　通过三级预防保健网 ,对该市饮水类型、水井深度、改水时间、饮水人口、各村食管癌发病数和死亡数进行了调查。结果　饮用山泉水居民食管癌发病率为 141.98/10万 ,饮用浅层地下水居民食管癌发病率为 97.6 7/ 10万 ,饮用深层地下水居民食管癌发病率为 86 .0 6 / 10万。饮用井深 <5 0 m和 >2 5 0 m井水的居民食管癌发病率高于饮用井深 5 0～ 2 5 0 m井水的居民 (P<0 .0 5 )。食管癌发病率山区 >丘陵 >平原。 80年代后由泉水、浅井水改为机井水 ,10～ 15年后食管癌发病率显著下降 (P<0 .0 1)。结论　该地区食管癌高发与饮用地下水类型和深度有关。山泉水、浅层地下水、 >2 5 0 m深层地下水中可能含有致癌促癌物质或缺乏某些物质 ,致使该地区居民食管癌高发

Present Status on Incidence of Esophageal Cancer Among Population Taking Drinking Water From Different Kinds of Ground Water Source in Linzhou City

Objective To explore the present status of incidence of esophageal cancer among population taking drinking water from different kinds of ground water source in Linzhou city Methods The investigation on different kinds of drinking water source,well depths,period of water improvement,population taking drinking water from different kinds of ground water source,the incidence and mortality of esophageal cancer in every observed village,was carried out supported by network of 3 level disease prevention and health care Results The incidence rate of esophageal cancer was 141 98 per one hundred thousand for population taking drinking water from moutain spring source,97 67 per one hundred thousand for population taking drinking water from shallow ground water source,86 06 per one hundred thousand for population taking drinking water from deep ground water source respectively Higher incidence rates of esophageal cancer were observed among population taking drinking water from well water source with a depth of less than 50 meters and more than 250 meters compared with those from well water source with a depth of 50~250 meters ( P<0 05 ) The highest incidence rate of esophageal cancer was observed in mountain area,the next in hill areas,and the third in plains After 10~15 year source water improvement The moutain springs and shallow wells were changed for pump wells in the late 1980's By 10~15 years after water improvement,the incidence rates of esophageal cancer significantly decreased Conclusion The higher incidences of esophageal cancer among population in Linzhou city,which were associated with the kinds and depths of ground water source,might be resulted in by the existence of some certain kinds of carcinogens or the insufficiency of some certain kinds of materials in drinking water sources such as moutain springs,shallow ground water,and more than 250 m deep ground water