NRS

Control group

(n = 13)

Study group

(n = 16)

P

1

3 (2 - 4)

2 (1 - 3.25)

0.09

2

3 (2 - 4)

2.5 (1 - 4)

0.17

4

4 (3 - 4)

2.5 (2 - 3.25)

0.06

6

3 (3 - 4)

3 (2 - 4)

0.36

12

3 (3 - 4)

3 (2 - 3.25)

0.47

24

3 (3 - 4)

3 (2 - 4)

0.71