title: Survivorship analysis and confidence intervals. An assessment with reference to the Stanmore total knee replacement.
abstract: Survivorship analysis is a useful way of expressing the long-term results of joint replacement: it provides a means of comparing the life span of one type of prosthesis with another. However, such studies should include a full life-table and the confidence intervals for the survival rates at given times. At least 40 surviving prostheses are required to provide reliable results.
authors.affiliation: St Bartholomew's Hospital, London, England.
authors.forename: A W
authors.initials: AW
authors.lastname: Lettin
authors.forename: H S
authors.initials: HS
authors.lastname: Ware
authors.forename: R W
authors.initials: RW
authors.lastname: Morris
mesh_terms: D016001:Confidence Intervals; D005500:Follow-Up Studies; D006801:Humans; D007720:Knee Prosthesis; D011237:Predictive Value of Tests; D011475:Prosthesis Failure; D012086:Reoperation