Exposureto hydrazine was positively associated with lung cancer incidence (estimated rate ratio for high vs low exposurewith 20-year lag = 2.5; 95% confidence interval = 1.3-4.9) and with colorectal cancer incidence (2.2; 1.0-4.6).

• 联氨暴露与肺癌发生率(高暴露对低暴露在20年后估计的率比为2.；5；95%25信赖区间为1