Table 3. Characteristics of study participants.

	Primary SS (n=107)				Rheumatoid arthritis (n=40)				Control (n=53)
	n	%	Mean±SD	Min-Max	n	%	Mean±SD	Min-Max	n	%	Mean±SD	Min-Max
Age (year)			50.7±11.6	23-76			51.7±14.2	25-79			46.8±15.5	21-80
Sex
Female	107	100			40	100			53	100
Comorbidity
Hypertension	35	32.7			10	25			17	32
Thyroid dysfunction	22	22.5			0	0			11	20.7
Hyperlipidemia	7	6.5			0	0			2	3.7
Coronary artery disease	2	1.86			1	2.5			2	3.7
Asthma	1	1.07			1	2.5			4	7.5
Autoimmune hepatitis	2	1.86			0	0			0	0
Depression	1	1.07			0	0			3	5.6
SD: Standard deviation; Min: Minimum; Max: Maximum; SS: Sjögren’s syndrome.