Table 2.

Distribution of Disease Severity within the Study Cohort for Individual Articular Elements.

	Severity of Disease
Articular Element	None	Mild	Moderate	Severe	Total
Cartilage	1	46	37	16	100
Osteophytes	33	35	11	21	100
Bone Marrow Lesions	63	31	5	1	100
Effusion	32	36	26	6	100
Synovitis	84	9	6	1	100
Subchondral Sclerosis	37	36	18	9	100

For all articular elements included in this table, the data are represented in terms of percentage of the total cohort having evidence of pathological changes of that type on MRI. Each row represents an individual articular element. Criteria for assessing the severity of each element (Cartilage, Osteophytes, Bone Marrow Lesions, Effusion, Synovitis and Subchondral Sclerosis) are given in Table 1.