Table 1 Characteristics of the study population

Age, years, mean (SD)

47 (13)

53 (12)

0.006

Symptom duration, mean (SD)

2.3 (1.8)

2.1(1.7)

ns

Female sex, number (%)

48 (96 %)

55 (97 %)

ns

Xerophtalmia, number (%)

44 (88 %)

47 (83 %)

ns

Xerostomia, number (%)

46 (92 %)

49 (86 %)

ns

Abnormal ocular tests, number (%)

37 (74 %)

32 (56 %)

ns

USFR, ml/15 minutes, mean (SD)

2.3 (2.6)

4.8 (3.4)

<0.0001

Focus score, mean (SD)

3.0 (2.3)

0(0)

<0.0001

Hypergammaglobulinemia, number (%)

27 (54 %)

3 (5 %)

<0.0001

Rheumatoid factor, number (%)

26 (52 %)

4 (7 %)

<0.0001

Anti-Ro/SSA, number (%)

30 (60 %)

1 (2 %)

<0.0001

Anti-La/SSB, number (%)

17 (34 %)

none

<0.0001