title: Survivorship analysis of total knee arthroplasty. Cumulative rates of survival of 9200 total knee arthroplasties.
abstract: From 1971 through 1987, 9200 total knee arthroplasties were performed at the Mayo Clinic. Actuarial analysis was used to estimate cumulative rates of survival. Use of a proportional-hazard, general linear model led to the identification of four independent variables that were associated with a significantly lower risk of failure: primary total knee arthroplasty, a diagnosis of rheumatoid arthritis, an age of sixty years or more, and use of a condylar prosthesis with a metal-backed tibial component. When all four of these favorable variables were present (without regard for radiographic changes and non-disabling symptoms), the probability of an implant being in situ was 97 per cent at both five and ten years.
authors.affiliation: Department of Orthopedics, Mayo Clinic, Rochester, Minnesota 55905.
authors.forename: J A
authors.initials: JA
authors.lastname: Rand
authors.forename: D M
authors.initials: DM
authors.lastname: Ilstrup
mesh_terms: D000368:Aged; D001168:Arthritis / Q000209:etiology / Q000601:surgery; D001172:Arthritis, Rheumatoid / Q000601:surgery; D005260:Female; D006801:Humans; D007718:Knee Injuries / Q000150:complications; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D010003:Osteoarthritis / Q000601:surgery; D011475:Prosthesis Failure; D012086:Reoperation; D016019:Survival Analysis