title: [Mathematical analysis in the prognostic determination of survivorship in patients with urothelial tumors of the upper urinary tract].
abstract: Mathematical analysis of the probable five-year survivorship is performed in patients operated on for neoplasms involving the urothelium lining the upper urinary tracts. The prognosis groups thus obtained are compared with the results of 5- to 10-year-long observation on the postoperative survival in fourty-one patients. It is established that the anticipated survivorship is determined with a high-degree probability by resorting to the mathematical method described.
authors.forename: S
authors.initials: S
authors.lastname: Stratev
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002031:Bulgaria / Q000453:epidemiology; D006801:Humans; D008875:Middle Aged; D011379:Prognosis; D012189:Retrospective Studies; D015996:Survival Rate; D014571:Urologic Neoplasms / Q000401:mortality*; D019459:Urothelium