Table 3.

Grading of grey scale for synovitis.

Scale	Condition of maximal potential joint enlargement	Prediction of synovitis
0	0	Absent
1	<⅓	Mild
2	≥⅓ but <½	Moderate
3	≥½ but <⅔	Moderate to severe
4	≥⅔ but <9/10	Sever
5	≥½	Extreme

MCP – metacarpophalangeal; PIP – proximal interphalangeal; MTP – metatarsophalangeal.