Fuzzy dependency analysis for medical checkup reference

We investigate dependency of human health condition evaluation on changing medical checkup reference. In our previous paper, we proposed an evaluation method based on fuzzy set for health checkup data. This method converted health checkup data into fuzzy degree to operate a multivariate data analysis. The obtained fuzzy degree was considered as an attribute value in closed interval [0, 1]. Total health indices which are defined by operation of the fuzzy degrees are treated as the same scale. In this paper, to investigate fuzzy normal degrees by changing to new reference interval, we visualized health changes by calculating the total health indices using our proposed method. As the result, we succeeded in visualizing health change, and confirmed quantitatively that disease patients decrease by changing to new reference interval.