Table 2: Comparison of the mean score of OSDI, Schirmer’s test, TBUT and cornea staining between Group A and Group B.

OSD parameters Group A
(n=44)
Mean (SD)
Group B
(n= 41)
Mean (SD)
p value
OSDI score
Schirmer’s test (mm)
TBUT (sec)
Cornea staining
19.6 (16.4)
8.6 (7.9)
7.0 (2.6)
5.6 (3.1)
10.4 (12.0)
9.4 (6.8)
8.7 (3.0)
1.7(2.3)
0.004
0.639
0.008
<0.001

p<0.05 (independent t-test).
Abbreviation: OSD; ocular surface disease, OSDI; ocular surface disease index, TBUT; tear break-up time.