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Table 1 Scoring key for murine knees

From: Cartilage preservation by inhibition of Janus kinase 3 in two rodent models of rheumatoid arthritis

Score Edge Proteoglycans Open lacuna Non-calcified layer Synovial lining Blood in cavity Pannus tongues
0 Smooth > 90% present None > 90% present 1 even Absent Absent
1 Rough > 50% present Some > 50% present < 50% 2 layers Present Present
2   < 50% present Many < 50% present > 50% 2 layers   
3   < 10% present   < 10% present 2 layers   
4      > 2 layers