Table 1 Baseline characteristics between CN and DQ groups
|  |  |  | Mean ± SD (Range) |
|---|---|---|---|
CN (n = 58) | DQ (n = 57) | p-value | |
Age (years) | 47.21 ± 15.91 (24 ~  81) | 43.86 ± 16.74(22 ~  79) | 0.2594 |
Gender (M/F)a | 6/52 | 7/50 | 0.7431 |
Corneoconjunctival staining (NEI scale) | 10.78 ± 5.02 (4.00 ~  27.00) | 10.25 ± 4.89 (4.00 ~  23.00) | 0.5220 |
 Corneal staining | 5.47 ± 1.70 (4.00~10.00) | 5.68 ± 1.84 (4.00 ~  10.00) | 0.5968 |
 Conjunctival staining | 5.31 ± 4.18 (0.00 ~  18.00) | 4.56 ± 3.71(0.00 ~  15.00) | 0.3089 |
TBUT (sec) | 3.87 ± 1.32 (1.05 ~  8.67) | 4.29 ± 1.85 (0.50 ~  8.42) | 0.3459 |
Schirmer test (mm) | 8.67 ± 6.30 (2.00 ~  35.00) | 7.96 ± 5.55 (1.00 ~  30.00) | 0.3955 |
OSDI (0–100) | 43.36 ± 20.61 (8.00 ~  94.00) | 42.46 ± 18.90 (2.00 ~  98.00) | 0.8065 |