In this study. Mahalanobis Taguchi System was used to forecast the future health conditions based on the results of existing medical examinations. For the construction of Mahalanobis Space and calculation of Mahalanobis Distance, the records of health examination in the past three years were used. In this analysis, data was divided into two groups : normal group and non-healthy group. The data collected from the normal group was used to construct a Mahalanobis Space. When a cut-off value of 2.0 was used, 98.1% of the healthy people fell below the threshold, and 91.9% of non-healthy people fell above the cut-off value. In order to forecast the future health conditions, the base space was constructed from the results of the people who were judged as healthy this year. Then Mahalanobis Distances were calculated for the people from the two categories : the people who were diagnosed as healthy and non-healthy last year. Using 1.5 as the cut-off value, 90% of the people who were judged as healthy last year were forecasted as healthy this year. However, 15% of the people who were judged as non-healthy last year were forecasted as healthy this year. These results indicate that Mahalanobis Taguchi System may be used to forecast the health condition for the coming year.
