[A study of standardization of surveillance data 1). Significance of "corrected value of patients" and its application to exanthema subtium and erythema infectiosum].

ABSTRACT

It is suggested that "Corrected value of patients" is a useful method in comparing prefectural surveillance data. "Corrected value of patients" is calculated as follows Ratio of the number of reported patients for 5 years of each prefecture of each infectious diseases to number of the national scale is called "Corrected rate". The number to be divided is called "Corrected value of patient", individually reported number of patients of the surveillance divided by "Corrected rate". Because the "Corrected value of patients" is based on the number of reported patients for 5 years, the unequality among epidemics which differ become similar. As the value of practical usage is well recognized, 3-dimensional graphs can be used for weekly reports, not only for Exanthema subitum but also for Erythem infectiosum.