Table 2.

Dry Eye Evaluations

Parameter	DR Group	Control Group	P
n	48	22	—
TBUT (s), mean ± SD	5.27 ± 1.77	7.35 ± 3.81	0.003a
Schirmer's test (mm), mean ± SD	6.98 ± 6.62	12.41 ± 6.37	0.002a
OSDI score, mean ± SD	14.56 ± 5.69	6.50 ± 3.13	<0.001a
NEI score, median (IQR)	3.00 (0.00–10.00)	2.00 (0.00–6.00)	0.244b

^a P values were derived from Student's t-test.

^b P value was derived from the Mann–Whitney U test.