This paper focused on the development of
diagnosis knowledge model of the level of hearing loss in
the audiology clinic patients using rough set theory. A
knowledge model contains a set of knowledge via rules that
are obtained from mining certain amount of data. These
data consist of valuable knowledge that impossible for the
audiologist or audio therapist to extract without powerful
mining techniques or tools. These rules help doctors in
decision making such as setting up new strategy to
improve the efficiency of the operation. In this work, a
data mining technique, rough set theory was used for the
knowledge modelling. It was used based on its capability of
handling uncertain data that often occurs in real world
problems. The results from the modelling produced a
classifier called rough classifier. The classifier was used to
classify the level of hearing loss. A total of 500 data
obtained from the audiology clinic. The data consisted of
24 attributes from four categories namely demography,
antenatal, neonatal and medical categories. These
attributes were used as an input and one attribute called
diagnostic category as an output. In order to facilitate the
modelling process requirement, these attributes have been
gone a pre-process stage. The best model has been
obtained from 10 experiments using 10 sets of different
training and test data. The experiment showed promising
results with 76% accuracy. The developed knowledge
model has a great potential to be embedded in the
development of the medical decision support system.