Table 1 The detailed demographic, clinical, and laboratory characteristics of 30 pSS patients

Sex, no. male/female

0/30

Age, mean ± SD years

47.63 ± 13.50

Dry mouth, VAS. mean ± SD

6.57 ± 2.12

Dry eyes, VAS. mean ± SD

2.90 ± 2.95

Parotid swelling, VAS. mean ± SD

4.00 ± 2.40

Rose bengal score, no. +/−

20/10

Saxon test (g/2 min). mean ± SD

1.44 ± 0.62

 Nonspecific chronic sialadenitis

1

 Grade 1 (<50 periductal lymphocytes)

1

Nonsegregated

6

Segregated aggregates

6

 Grade 3 (>50 periductal lymphocytes, with GC-like structures)

16

Ro (SSA), no. +/−

24/6

La (SSB), no. +/−

10/20

Anti-centromere antibodies (ACA), no. +/−

6/24

ESR (mm/hr). mean ± SD

21.77 ± 12.95

RF (IU/ml). mean ± SD

146.21 ± 195.12

IgG (g/L). mean ± SD

19.12 ± 4.10

IgA (g/L). mean ± SD

3.22 ± 0.84

IgE (IU/ml). mean ± SD

78.54 ± 68.92

IgM (g/L). mean ± SD

1.73 ± 0.74

Course of disease (month). mean ± SD

35.53 ± 26.04

CRP (mg/L). mean ± SD

4.46 ± 2.15

C3 (g/L). mean ± SD

1.10 ± 0.19

C4 (g/L). mean ± SD

0.26 ± 0.07

β2 microglobulin(mg/L). mean ± SD

2.80 ± 0.88