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有相当一部分临床医生对相对数的概念不理解,常把“率”和“构成比”相混淆,把发病率与患病率、死亡率与病死率相混淆。如某作者分析38例流行性出血热患者,将38例患者按职业分为:工人25例(65.8%),干部7例(18.4%),学生4例(10.5%),农民2例(5.3%),于是便得出工人发病率最高的结论。在这个例子中,百分数的分母均为本组总例数38例,几个百分数拥有共同的分母,其中任何一个分数的分子发生变化,都必然影响其他的变化。因此,这里的百分数只能说明部分占
A considerable number of clinicians do not understand the concept of relative numbers and often confuse “rate ” with “constitute ”, the morbidity and prevalence, mortality and mortality are confused. For example, one author analyzed 38 patients with epidemic hemorrhagic fever and divided 38 patients according to occupation: 25 workers (65.8%), 7 cadres (18.4%), 4 students (10.5%), 2 farmers %), Then come to the conclusion that the highest incidence of workers. In this example, the percentage of the denominator are 38 cases of the total number of cases in this group, a few percent share a common denominator, any change in the numerator of any one of these scores will inevitably affect other changes. Therefore, the percentage here only shows part of the total