title: Assisting the diagnosis of thyroid diseases with Bayesian-type and SOM-type neural networks making use of routine test data.
abstract: Patients with hyperthyroidism sometimes take much time to receive the final diagnosis. To improve patient QOL, simple screening for hyperthyroidism by thyroid non-specialists at the physical check-up is highly expected. Therefore, we applied both Bayesian-type and SOM-type neural networks since we assured the approach useful in analysing thyroid function diagnosis in the previous work. Routine test (14 parameters) data from 66 subjects with a known diagnosis (18 patients with hyperthyroidism and 48 healthy volunteers) were adopted as learning data, and then 142 individuals who also received the same routine tests at the Tohoku University Hospital were screened to predict patients with hyperthyroidism. Both neural networks using 14 parameters predicted several patients as having hyperthyroidism with high probability, including all three hyperthyroid patients diagnosed later by the physician. Further detailed analysis of the routine test parameters that were important for classification found that screening with a set of three parameters (alkaline phosphatase, serum creatinine and total cholesterol) or plus aspartate aminotransferase allowed for quite accurate screening. These results showed that the same neural networks as previous work allows simple screening of patients for hyperthyroidism on the basis of routine test data, and that physicians not specializing in the thyroid can rapidly identify individuals suspected of having hyperthyroidism, to permit a rapid referral for examination and treatment by thyroid specialists.
authors.affiliation: Information Science Center, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Hoshi
authors.forename: Junko
authors.initials: J
authors.lastname: Kawakami
authors.forename: Wataru
authors.initials: W
authors.lastname: Sato
authors.forename: Kenichi
authors.initials: K
authors.lastname: Sato
authors.forename: Akira
authors.initials: A
authors.lastname: Sugawara
authors.forename: Yoshihiko
authors.initials: Y
authors.lastname: Saito
authors.forename: Katsumi
authors.initials: K
authors.lastname: Yoshida
mesh_terms: D001499:Bayes Theorem; D003198:Computer Simulation; D016208:Databases, Factual; D003936:Diagnosis, Computer-Assisted / Q000379:methods*; D005260:Female; D006801:Humans; D006980:Hyperthyroidism / Q000175:diagnosis; D008297:Male; D016571:Neural Networks, Computer; D011237:Predictive Value of Tests; D013959:Thyroid Diseases / Q000175:diagnosis*; D013960:Thyroid Function Tests / Q000706:statistics & numerical data; D013974:Thyroxine / Q000097:blood
chemical_list: D013974:Thyroxine