Table 2

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

Primary SS patientsSecondary SS patientsControls
(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 score4.6 (1.7)4.4 (1.2)0.17 (0.39)
Dry eye symptom score5.6 (3.0)4.3 (2.9)0.0