Authors: Mikko Peltola Jutta Järvelin
Publish Date: 2014/11/07
Volume: 134, Issue: 12, Pages: 1767-1774
Abstract
Previous research findings regarding the association between the outcomes of total hip and knee arthroplasty and patients’ socioeconomic status have been contradictory Consequently we wanted to analyse whether individuallevel household income was associated with the risk of revision arthroplasty and whether the time span in days from the primary arthroplasty to the revision operation varied according to income quintileAll first total hip and knee arthroplasties performed due to primary osteoarthritis in Finland from 1998 to 2007 were included in the study Cox proportional hazard regression modelling was applied in the analysis regarding the risk of revision after the primary operation while Poisson regression modelling was applied in the analysis regarding differences in the time from the primary to the revision operation between income quintilesThe relationship between household income and the risk of revision arthroplasty was not statistically significant The relationship remained insignificant even when age sex and other confounding factors were adjusted for or analyses concerned revision in short or long term In both the total hip arthroplasty and knee arthroplasty populations patients in the lowest income quintiles underwent revision surgery earlier than patients in the highest income groups but this difference was not statistically significant
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