Table 3. Frequency of serology at fulfillment of criteria for mixed connective disease among Olmsted County, Minnesota residents in 1985-2014.

	Numbers positive/numbers tested (%)
ANA	50/50 (100)
Anti-RNP	50/50 (100)
Anti SS-A	7/49 (14)
Anti SS-B	0/49 (0)
Anti Sm	9/50 (18)
Anti Scl-70	2/40 (5)
Anti-centromere	0/13 (0)
Anti-ds-DNA	1/35 (3)
Anti Jo-1	1/41 (2)
Anti RNA polymerase III	0/2 (0)
Hypocomplementemia	1/32 (3)
Rheumatoid factor	8/34 (24)
Anti CCP	0/10 (0)

Abbreviations: ANA indicates antinuclear antibody; RNP, ribonucleoprotein; ds-DNA, double-stranded deoxyribonucleic acid; RNA, ribonucleic acid; CCP, cyclic citrullinated peptide