纽约卫生局1907～1975年底记录了1,004个慢性伤寒带菌者。为了验证伤寒带菌状态与肝胆癌密切相关的假设,作者对在1922～1975年间纽约卫生局记录已死的伤寒带菌者进行了对照研究,作者将471例伤寒带菌者的死亡原因和942例对照者进行比较,(见下表)这些对照者与带菌者的性别、死亡年龄、死亡年份,死亡的行政区以及出生地相配。肝胆癌和伤寒带菌状态之间联系的可 The New York Department of Health recorded 1,004 chronic typhoid carriers from 1907 to the end of 1975. In order to validate the hypothesis that the carriage of typhoid fever is closely related to liver and gallbladder cancer, the authors conducted a controlled study of the deadly typhoid carriers in the New York Department of Health between 1922 and 1975. The authors compared the causes of death of 471 typhoid carriers with 942 controls (See table below) These controls matched the carrier’s sex, age of death, year of death, district of death, and place of birth. Hepatocellular carcinoma and typhoid can be linked between the state