|  | Decreasea | Increasea | ||||||
---|---|---|---|---|---|---|---|---|---|
 | Chondroitin sulfate (n = 26)b | Celecoxib (n = 24)b | p valuec | Chondroitin sulfate (n = 12) | Celecoxib (n = 8) | p valuec | Chondroitin sulfate (n = 12) | Celecoxib (n = 14) | p valuec |
Medial suprapatellar bursa | |||||||||
 Synovial membrane thickness loss (mm) | –0.66 ± 22.72 | +17.96 ± 33.73 | 0.076 | –0.23 ± 0.27 | –0.14 ± 0.21 | 0.446 | +0.13 ± 0.09 | +0.25 ± 0.17 | 0.030 |
Medial compartment | |||||||||
 Cartilage volume loss (%) | –6.8 ± 3.5 | –9.4 ± 4.7 | 0.045 | –7.5 ± 3.7 | –11.3 ± 3.5 | 0.036 | –6.4 ± 3.4 | –7.8 ± 4.8 | 0.404 |