Table 3.

Comparison of dry eye symptoms and ocular surface parameters in the OPT treatment group before and after surgery in patients

parameters	baseline	1 month	3 month	p value
				baseline vs 1 month	baseline vs 3 month	1 month vs 3 month
OSDIa	31.39 ± 8.57	28.10 ± 5.88	21.58 ± 4.97	0.027*	0.000*	0.000#
EMASb	1.00 (1.00, 2.00)	1.00 (0.00, 1.25)	1.00 (0.00, 1.00)	0.020*	0.025*	0.739
MGYSSb	1.00 (1.00, 1.00)	1.00 (1.00, 1.00)	1.00 (0.00, 1.00)	0.414	0.020*	0.467
CFSb	0.00 (0.00, 1.00)	0.00 (0.00, 1.00)	0.00 (0.00, 1.00)	0.577	0.589	1.000
TMHa/mm	0.18 ± 0.31	0.19 ± 0.03	0.19 ± 0.02	0.210	0.147	0.611
NITBUTa/s	4.98 ± 1.84	5.67 ± 1.80	5.87 ± 1.17	0.091	0.026*	0.550
MGLSb	1.00 (1.00, 2.00)	1.00 (1.00, 2.00)	1.00 (1.00, 1.00)	0.083	0.002*	0.008#

OSDI Ocular Surface Disease Index, MGYSS Meibomian gland yielding secretion score, CFS corneal fluorescein staining, TMH tear meniscus height, EMAS Eyelid margin abnormality score, MGLS meibomian gland loss score, TBUS tear film break-up time. a: Normal distribution data, the mean is expressed as Mean ± SD, and the paired sample t test is used for comparison between groups. b: Non-normally distributed data, the mean is represented by Median (P25, P75), and the comparison between groups is based on paired sample nonparametric Wilcoxon test. *p < 0.05 vs Baseline; #p < 0.05 vs 1 month