Figure 2From: Decrease in the incidence of total hip arthroplasties in patients with rheumatoid arthritis - results from a well defined population in south SwedenIncidence rate ratios for THA and TKA in the second and first study subperiods. Incidence rate ratio for first primary total hip and knee arthroplasty for 2002 to 2006/2007 vs 1998 to 2001 (95% confidence interval).Back to article page