Diagnosis of a patient's "sho" is important in kampo medicine. Treating a patient's "sho" as a type of pattern, we made trial use of the MT system as a method of pattern recognition to diagnose the group of patients fbond to be in the "oketsu" state. For accuracy of "oketsu" diagnosis, it is important to examine the S/N ratio of the MMTA method, and a multi-tiered MT system has been suggested as a method for improving accuracy, so we performed an S/N analysis of both the single-tiered and three-tiered MMTA methods and compared their diagnostic accuracy, As a result, a higher S/N gain was obtained from the threetiered S/N ratio. We think this study can contribute to improved accuracy in kampo medical diagnosis.
