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Historical view and future demand for knee arthroplasty in Sweden.

Journal article
Authors Szilard Nemes
Ola Rolfson
Annette W-Dahl
Göran Garellick
Martin Sundberg
Johan Kärrholm
Otto Robertsson
Published in Acta orthopaedica
Volume 86
Issue 4
Pages 426-31
ISSN 1745-3682
Publication year 2015
Published at Institute of Clinical Sciences, Department of Orthopaedics
Pages 426-31
Language en
Subject categories Orthopedics


Background and purpose - The incidence of knee osteoarthritis will most likely increase. We analyzed historical trends in the incidence of knee arthroplasty in Sweden between 1975 and 2013, in order to be able to provide projections of future demand. Patients and methods - We obtained information on all knee arthroplasties in Sweden in the period 1975-2013 from the Swedish Knee Arthroplasty Register, and used public domain data from Statistics Sweden on the evolution of and forecasts for the Swedish population. We forecast the incidence, presuming the existence of a maximum incidence. Results - We found that the incidence of knee arthroplasty will continue to increase until a projected upper incidence level of about 469 total knee replacements per 10(5) Swedish residents aged 40 years and older is reached around the year 2130. In 2020, the estimated incidence of total knee arthroplasties per 10(5) Swedish residents aged 40 years and older will be 334 (95% prediction interval (PI): 281-374) and in 2030 it will be 382 (PI: 308-441). Using officially forecast population growth data, around 17,500 operations would be expected to be performed in 2020 and around 21,700 would be expected to be performed in 2030. Interpretation - Today's levels of knee arthroplasty are well below the expected maximum incidence, and we expect a continued annual increase in the total number of knee arthroplasties performed.

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