队列研究用于揭示某一特定的接触是否引起疾病及引起什么类型的疾病。同样,它也可用于确定不存在某种危险。对于职业卫生工作者,特别是从事卫生标准制订的工作者,确定不存在不良作用非常重要。 一项正确的阴性研究必须满足三个标准①大样本;②灵敏;③有完整的接触资料。一项好的研究设计应适用于所有的流行病学研究,但否定的 Cohort studies are used to reveal whether a particular contact causes disease and what type of disease it causes. Similarly, it can be used to determine that there is no danger. For occupational health workers, especially workers engaged in the development of health standards, it is important to establish that there are no adverse effects. A correct negative study must meet three criteria ① large sample; ② sensitive; ③ have complete contact information. A good research design should apply to all epidemiological studies but negative