Table 1.

Comparison between OMRF and Euroimmun antibody assays. All positives by OMRF were also positive by Euroimmun≥15. EBO=Euroimmun; OMRF=Oklahoma Medical Research Foundation; #=number, NA=not applicable given there were zero positive OJ results on OMRF.

Autoantibody (EUROIMMUN vs OMRF)	#of patients tested	#of OMRF positive	#of positives on EBO	Cut-off (>=15)/+			#of positives on EBO	Cut-off (>=36)/++			#of positives on EBO	Cut-off (>=71)/+++
				Sensitivity	Specificity	Kappa		Sensitivity	Specificity	Kappa		Sensitivity	Specificity	Kappa
Jo1	281	29	31	96.6	98.6	0.93	27	89.7	99.6	0.92	24	79.3	99.6	0.85
Mi2	280	20
Mi2a	280		20	94.7	99.6	0.94	11	55.0	100.0	0.69	2	10.5	100.0	0.18
Mi2b	280		30	85.0	95.0	0.65	18	60.0	97.7	0.60	8	40.0	100.0	0.55
Mi2a or Mi2b	280		33	100.0	94.9	0.73	22	80.0	97.6	0.74	8	40.0	100.0	0.55
M12a and Mi2b	280		17	80.0	99.6	0.85	7	35.0	100.0	0.50	2	10.0	100.0	0.17
SRP	280	18	27	94.4	96.2	0.74	20	94.4	98.6	0.89	13	70.6	99.6	0.79
PM-Scl	279	12
PM75	279		26	83.3	94.0	0.50	13	75.0	98.5	0.71	7	58.3	100.0	0.73
PM100	279		15	83.3	98.1	0.73	10	66.7	99.2	0.72	4	25.0	99.6	0.36
PM75 or PM100	279		33	100.0	92.1	0.50	16	83.3	97.7	0.70	8	58.3	99.6	0.69
PM75 and PM100	279		8	66.7	100.0	0.79	7	58.3	100.0	0.73	3	25.0	100.0	0.39
PL7	280	5	15	100.0	96.4	0.49	9	100.0	98.5	0.71	5	100.0	100.0	1.00
PL12	281	3	7	100.0	98.6	0.59	4	100.0	99.6	0.86	4	100.0	99.6	0.86
Ku	279	3	5	100.0	99.3	0.75	5	100.0	99.3	0.75	5	100.0	99.3	0.75
EJ	281	2	3	100.0	99.6	0.80	2	100.0	100.0	1.00	2	100.0	100.0	1.00
OJ	281	0	2	NA	NA	NA	0	NA	NA	NA	0	NA	NA	NA