Table 1.

Characteristics of primary Sjögren’s syndrome (pSS) patients, Sicca, and health controls.

	pSS (n = 31)	Sicca (n = 7)	Health controls (n = 31)
Age, mean ± SD	49.4 ± 10	44 ± 18.6	46.2 ± 8
Female sex (%)	93.55	100	90.32
Negative anti-SSA and anti-SSB (%)	6 (19.35%)	6 (85.71%)	–
Positive anti-SSA (%)	11 (35.48%)	1 (14.28%)	–
Positive anti-SSA and anti-SSB (%)	14 (45.16%)	0	–
ESSDAI, mean ± SD (range)	5.85 ± 5.78 (0–21)	–	–

ESSDAI, EULAR Sjögren’s Syndrome Disease Activity Index.

The pSS patients were diagnosed according to the 2002 American-European Consensus Group criteria without treatment.