Laser

LS Mean

SiC

LS Mean

LS

Mean Diff.

LS

SE

95% CI

p-value

Group 1

20.78

15.62

5.17

1.39

2.37; 7.96

0.0005^*

Group 2

18.93

13.99

4.94

1.24

2.46; 7.42

0.0002^*

Group 3

7.94

4.32

3.62

0.69

2.25; 5.00

<0.0001^*

Group 4

4.78

2.52

2.26

0.55

1.13; 3.39

0.0003^*