Osteogenic protein 1 in synovial fluid from patients with rheumatoid arthritis or osteoarthritis: relationship with disease and levels of hyaluronan and antigenic keratan sulfate

Table 1 Demographical representation of human subjects enrolled in the study

Group	Sample number	Age (years)	Sex	Race	Collins grade
Donors	1	66	Female	Caucasian	4
	2	69	Male	Caucasian	2
	3	54	Male	Caucasian	2
	4	74	Male	Caucasian	3
	5	79	Male	African-American	2
	6	67	Male	Caucasian	4
	7	67	Male	Caucasian	4
	8	52	Male	Caucasian	2
	9	67	Female	Caucasian	3
	10	40	Female	African-American	1
	11	54	Male	Caucasian	0
	12	92	Female	Caucasian	2
	13	73	Male	Caucasian	2
	14	53	Male	African-American	0
Osteoarthritis patients	1	84	Male
	2	85	Male
	3	81	Male
	4	81	Male
	5	82	Male
	6	84	Male
	7	53	Female
	8	58	Male
	9	60	Female
	10	54	Female
	11	60	Female
	12	75	Female
	13	81	Female
	14	41	Male
	15	75	Female
	16	67	Female
	17	64	Female
	18	87	Female
	19	71	Male
	20	70	Female
	21	53	Female
	22	71	Male
	23	82	Male
	24	79	Female
	25	37	Female
	26	51	Male
	27	81	Male
	28	83	Female
	29	40	Female
Rheumatoid arthritis patients	1	47	Female
	2	42	Female
	3	73	Female
	4	56	Female
	5	26	Female
	6	41	Male
	7	62	Male
	8	53	Female
	9	66	Female
	10	66	Female
	11	26	Female
	12	26	Female
	13	73	Female
	14	42	Female
	15	34	Female
	16	49	Female
	17	70	Male
	18	53	Male
	19	52	Male
	20	40	Female
	21	68	Female
	22	49	Male
	23	76	Male
	24	22	Female
	25	72	Female

Collins grade was assigned only to the cadaveric joints. Racial background of the osteoarthritis patients and of the rheumatoid arthritis patients was not available to us.

ISSN: 1478-6362