Table 4 Comparison of different parameters between cases and controls after 3 months

Schirmer test I

12.64 ± 0.929

7.86 ± 1.351

<  0.001

TMH

0.21 ± 0.01038

0.1486 ± 0.02685

<  0.001

NITBUT

12.07 ± 0.997

9.57 ± 1.399

<  0.001

LLT

80.86 ± 3.820

67.14 ± 3.207

<  0.001

CSF

0. 86 ± 0.663

2.36 ± 0.497

<  0.001

 Upper

2.57 ± 0.646

2.86 ± 0.663

0.302

 Lower

3 ± 0.679

3.07 ± 0.829

0.793