@article{oai:niigata-u.repo.nii.ac.jp:00017682,
 author = {片桐, 幹雄 and 山本, 正治},
 issue = {2},
 journal = {新潟医学会雑誌, 新潟医学会雑誌},
 month = {Feb},
 note = {An epidemiologic episode of arsenic poisoning in well water from a King's Yellow factory was incidentally induced in Nakajo Town, Niigata Prefecture, Japan in September, 1959. Totally 86 residents who drank arsenic contaminated well water were suffered from symptoms of chronic arsenicism. The aim of this study is to evaluate the biological effects of drinking water contaminated by arsenic on life convalescence. Those with symptoms（case group）and 257 healthy residents in the same area（control group）were recruited and followed up for 34 years after the incident. The number of deaths and the all causes of deaths during this period were investigated. By using Cutler-Ederer's method, a cumulative survival rate for the case group was calculated and compared with that for the control group. In 216 months（18 years）after the incident, that for the case group；0.826 was significantly lower than that for the control group；0.922. Afterward, the discrepancy of those rates between the groups was more expanded, and in 408 months（34 years）after the incident；0.628 and 0.784, respectively. On the condition that the effect of deaths from lung cancer was excluded, however, the observed discrepancy almost disappeared. In conclusion, the discrepancy of the cumulative survival rates between the case and the control groups is considered to be caused mainly by deaths from lung cancer.},
 pages = {104--111},
 title = {砒素環境汚染の人体影響評価について : 累積生存率に関する分析},
 volume = {111},
 year = {1997}
}