Disability worsening over two years according to domains of disability, for subjects with knee arthroplasty identified in 1999 (134 subjects) compared to the other participants (11,510 subjects), after adjustment for age, sex, education, chronic conditions and probability of nonresponse.

Adjusted Odds ratio [Adj-OR] and 95% confidence interval [CI]. Significant ORs are in bold. *Worsening walking-distance limitation was defined by the decrease of a class (i.e., <100, 100–300, 300–500, 500–1000) to another.