Table 3.

Results of ELISA using PM1-α peptide with polymyositis/scleroderma and various control sera

	Number (%) of anti-PM1-α-positive sera	Mean value/standard deviation	Top value
Polymyositis/scleroderma (n = 40)	22 (55)	3.1/3.2	11.6
Rheumatic disease controls (n = 452)	33 (7.3)	0.6/0.9	7.7
Polymyositis (n = 40)	3 (7.5)	1.0/1.1	7.4
Scleroderma (n = 205)	27 (13.2)	0.9/1.2	7.5
Rheumatoid arthritis (n = 69)	0 (0)	0.3/0.2	1.1
Mixed connective tissue disease (n = 6)	0 (0)	0.4/0.1	0.6
Undifferentiated connective tissue disease (n = 10)	0 (0)	0.3/0.0	0.4
Systemic lupus erythematosus (n = 114)	3 (2.6)	0.5/0.7	7.7
Other rheumatic diseases (n = 8)	0 (0)	0.3/0.1	0.6
Hepatitis C virus (n = 48)	2 (4.2)	0.5/0.5	2.6
Organ specific disorders (n = 23)	0 (0)	0.4/0.2	0.8
Hashimoto thyroiditis (n = 11)	0 (0)	0.3/0.2	0.8
Grave's disease (n = 12)	0 (0)	0.4/0.2	0.8
Healthy individuals (n = 4)	0 (0)	0.6/0.2	0.7