Table 2.

Objective and subjective clinical scores of dry eye in SS patients and controls (mean (SD))

	Primary SS patients	Secondary SS patients	Controls
	(n = 14)	(n = 14)	(n = 17)
Schirmer I test (mm)	4.0 (2.8)	4.3 (3.2)	15.4 (4.6)
Tear break up time (sec)	2.3 (2.0)	3.5 (1.9)	12.8 (5.7)
Rose bengal staining score	4.6 (1.7)	4.4 (1.2)	0.17 (0.39)
Dry eye symptom score	5.6 (3.0)	4.3 (2.9)	0.0