Structural tissue damage and 24-month progression of semi-quantitative MRI biomarkers of knee osteoarthritis in the IMI-APPROACH cohort

Table 9 Baseline Frequencies of Osteophytes

N = 285			All knees		No ROA		ROA		P
N = 285			Frequency	Percent	Frequency	Percent	Frequency	Percent
Knee	Number of locations	0	29	10.2	28	22.0	1	0.6	0.0000
		1	43	15.1	40	31.5	3	1.9
		2	36	12.6	31	24.4	5	3.2
		3	19	6.7	10	7.9	9	5.7
		4	21	7.4	7	5.5	14	8.9
		5	12	4.2	1	0.8	11	7.0
		6	19	6.7	4	3.1	15	9.5
		7	24	8.4	3	2.4	21	13.3
		8	24	8.4	2	1.6	22	13.9
		9	18	6.3	1	0.8	17	10.8
		10	15	5.3	0	0.0	15	9.5
		11	14	4.9	0	0.0	14	8.9
		12	11	3.9	0	0.0	11	7.0
	Max score	0	29	10.2	28	22.0	1	0.6	0.0000
		1	129	45.3	92	72.4	37	23.4
		2	69	24.2	6	4.7	63	39.9
		3	58	20.4	1	0.8	57	36.1
MFTJ	Number of locations	0	59	20.7	54	42.5	5	3.2	0.0000
		1	71	24.9	53	41.7	18	11.4
		2	60	21.1	17	13.4	43	27.2
		3	95	33.3	3	2.4	92	58.2
	Max score	0	59	20.7	54	42.5	5	3.2	0.0000
		1	132	46.3	71	55.9	61	38.6
		2	67	23.5	1	0.8	66	41.8
		3	27	9.5	1	0.8	26	16.5
LFTJ	Number of locations	0	103	36.1	87	68.5	16	10.1	0.0000
		1	68	23.9	30	23.6	38	24.1
		2	64	22.5	8	6.3	56	35.4
		3	50	17.5	2	1.6	48	30.4
	Max score	0	103	36.1	87	68.5	16	10.1	0.0000
		1	94	33.0	35	27.6	59	37.3
		2	45	15.8	5	3.9	40	25.3
		3	43	15.1	0	0.0	43	27.2
PFJ	Number of locations	0	95	33.3	76	59.8	19	12.0	0.0000
		1	48	16.8	29	22.8	19	12.0
		2	41	14.4	13	10.2	28	17.7
		3	26	9.1	5	3.9	21	13.3
		4	34	11.9	3	2.4	31	19.6
		5	24	8.4	1	0.8	23	14.6
		6	17	6.0	0	0.0	17	10.8
	Max score	0	95	33.3	76	59.8	19	12.0	0.0000
		1	128	44.9	48	37.8	80	50.6
		2	42	14.7	3	2.4	39	24.7
		3	20	7.0	0	0.0	20	12.7

ISSN: 1471-2474