title: Notes on the use and interpretation of radiostereometric analysis.
abstract: With increasing numbers of research groups carrying out radiostereometric analysis (RSA), it is important to reach a consensus on how the main aspects of the technique should be carried out and how the results should be presented in an appropriate and consistent way. In this collection of guidelines, we identify a number of methodological and reporting issues including: measurement error and precision, migration and migration direction data, and the use of RSA as a screening technique. Alternatives are proposed, and a statistical analysis is presented, from which a sample size of 50 is recommended for screening of newly introduced prostheses.
authors.affiliation: Centre for Hip Surgery, Wrightington Hospital, Appley Bridge, UK. Brian.Derbyshire@wwl.nhs.uk
authors.forename: Brian
authors.initials: B
authors.lastname: Derbyshire
authors.forename: Robin J
authors.initials: RJ
authors.lastname: Prescott
authors.forename: Martyn L
authors.initials: ML
authors.lastname: Porter
mesh_terms: D019644:Arthroplasty, Replacement, Hip; D006622:Hip Prosthesis; D006801:Humans; D007595:Joint Prosthesis; D010003:Osteoarthritis / Q000000981:diagnostic imaging / Q000601:surgery; D010780:Photogrammetry / Q000592:standards*; D011475:Prosthesis Failure; D011859:Radiography