Table 1.

Source and description of samples used in the study

Sample source	Disease	Number	Female, no. (%)	Age (range)	anti-CCP positive, no. (%)	RF positive, no. (%)
Dr. P. Gregersen, plasma set 1	RA	30	28 (93)	72.6 (51 to 89)	20 (67)	24 (80)
	Healthy	10
Dr. P. Gregersen, plasma set 2	IBD	20	13 (65)	46.4 (23 to 82)
	JRA	20	16 (80)	37.3 (10 to 71)	6 (30)	6 (30)
	PsA	14	11 (79)	52.6 (23 to 75)
	PS	20	10(50)	55.3(22 to 86)
	RA	20	19(95)	59.0(35 to 89)
	SLE	20	13 (65)	51.3 (29 to 67)

CCP, cyclic-citrullinated peptides; RF, rheumatoid factor; RA, rheumatoid arthritis; IBD, inflammatory bowel disease; JRA, juvenile rheumatoid arthritis; PsA, psoriatic arthritis; PS, psoriasis; SLE, systemic lupus erythematosus.