VAS score

t value

P value

Before PKP

6.64 ± 1.16

One day after PKP

2.51 ± 0.92*

27.47

0.00

One month after PKP

2.37 ± 1.21*

25.09

0.00

Three months after PKP

2.68 ± 1.43*

21.18

0.00