抄録
The normal range was calculated using multivariate laboratory data. Multivariate data of each sample were replaced in a single variable as Mahalanobis' distance (D), and truncation and iteration methods were adopted to D variable. Normal ranges were calculated using means and standard deviations obtained from the final truncation. The standard deviations calculated in each iteration must be corrected. This method is applicable to calculate the normal ranges or clinical reference values from patient data.