Table 2 Frequency of autoantibodies in IgM anti-cytomegalovirus (CMV)(+) patients versus IgM anti-CMV(-) patients

n

20

39

U1RNP

37% (7/20)

31% (12/39)

Sm

0% (0/20)

15% (6/39)

Sm/U1RNP

0% (0/7)

50% (6/12)*

Ribosomal P

5% (1/20)

10% (4/39)

RNA helicase A

15% (3/20)

26% (10/39)

Ro

35% (7/20)

38% (15/39)

La

15% (3/20)

8% (3/39)

Ku

10% (2/20)

5% (2/39)

Su

30% (6/20)

23% (9/39)

RNA polymerase II

10% (2/20)

8% (3/39)

U1RNP/Sm ELISA > 25 units

0% (0/20)

28% (11/39)^†