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相对数指标计算简便,应用范围较广,在医疗卫生工作中是一种常用的统计指标。相对数虽然便于计算,但在实际应用中不同的相对数指标有其不同的应用范围,应用时若不注意或不了解这一点往往会发生误差,导致错误的结论。只有正确应用,才能发挥相对数指标应有的作用。 一、率和构成比,要正确应用 较常见的错误是将构成比错当率来应用,如表1所示某地甲、乙两医院消化性溃疡患病率的比较足以说明这一点。
The relative index calculation is simple, the application of a wide range of medical and health work is a commonly used statistical indicators. Although the relative number is easy to calculate, different relative number indexes have different applications in practical applications. If you do not pay attention or do not understand this point, errors often occur and lead to wrong conclusions. Only the correct application, in order to play a relative number of indicators should have a role. First, the rate and composition ratio, to the correct application of the more common mistake is to use the composition of the ratio of error rate, as shown in Table 1 A, B Hospital peptic ulcer prevalence comparison sufficient to illustrate this point.