From: Expression analysis of three isoforms of hyaluronan synthase and hyaluronidase in the synovium of knees in osteoarthritis and rheumatoid arthritis by quantitative real-time reverse transcriptase polymerase chain reaction
Age (years)
Subjects
Number (male/female)
Mean ± SD
Range
Radiographic gradea
With OA
17 (9/8)
64.77 ± 9.02
45 – 83
B
With RA
14 (2/12)
60.55 ± 12.05
35 – 74
Controls
20 (11/9)
37.25 ± 7.59
29 – 59
Normal