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在日常生活中,我们经常会用到百分数。但在更多的领域里,百分数是远远不够用的,为了直观地了解一些概念,人们不得不发明了千分数甚至万分数。我们一起来看看这些超酷的数字吧!发病率研究者们通常用发病率来研究一项疾病在某个地区的危险程度。所谓发病率,是指在一定期间内,一定人群中某种疾病新发生的病例出现的频率。比如要研究胃癌的发病率,我们选取了一个有100人口的小镇,在未来的一年中,有2个人得了胃癌,那胃癌在这座小镇的
In everyday life, we often use the percentage. But in more fields, the percentage is far from enough. In order to understand some concepts intuitively, people have to invent the thousand or even ten thousandths of a percentage. Let’s take a look at these cool numbers! Morbidity Researchers often use morbidity to study the risk of a disease in a particular area. The so-called morbidity, refers to a certain period of time, a certain population in a new occurrence of disease frequency of occurrence of cases. For example, to study the incidence of gastric cancer, we have chosen a town of 100 people in the coming year, two people had stomach cancer, stomach cancer in the town