Figure 5From: Osteogenic protein 1 in synovial fluid from patients with rheumatoid arthritis or osteoarthritis: relationship with disease and levels of hyaluronan and antigenic keratan sulfateCorrelation between osteogenic protein 1 and hyaluronan levels in synovial fluid samples from osteoarthritis patients. In the osteoarthritis group, there is a tendency for a positive correlation between synovial fluid osteogenic protein 1 (OP-1) and hyaluronan (HA) contents (r2 = 0.1345, P = 0.0654).Back to article page