Table 1

Baseline characteristics of the 1888 evaluated joints of the 59 studied patients with rheumatoid arthritis

	Joints
Characteristics	Wrists	MCP	PIP	MTP	Total
Number	118	590	590	590	1888
Clinical synovitis
0 = absent	19.7^*	49.0	56.8	77.1	58.4
1 = doubtful	23.1	13.3	11.7	12.2	13.1
2 = present, moderate	38.5	23.1	21.0	8.0	18.7
3 = present, important	18.8	14.6	10.5	2.7	9.9
US grey-scale synovitis^†
Grade 0	17.9	49.5	62.5	44.3	50.0
Grade 1	35.0	15.1	11.4	26.2	18.6
Grade 2	27.4	13.6	10.8	15.3	14.1
Grade 3	19.7	21.8	15.3	14.2	17.3
US Power Doppler^†
Grade 0	40.2	71.6	82.5	78.0	75.1
Grade 1	17.9	9.2	8.5	9.3	9.5
Grade 2	32.5	13.9	4.9	9.3	10.8
Grade 3	9.4	5.3	4.1	3.4	4.6

↵* numbers provided are the percentage of joints in a specific category.
↵† see Methods section for detailed description of the ultrasonographic grading systems.
MCP, metacarpophalangeal; MTP, metatarsophalangeal; PIP, proximal interphalangeal; US, ultrasound.