Time

(p) group

(n = 22)

(L) group

(n = 22)

(G) group

(n = 22)

(LG) group)

(n = 22)

P value

Before induction

84.5 ± 17.6

86.4 ± 16.5

85.8 ± 16.7

82.2 ± 15.6

0.834

After intubation

101.4 ± 12.5^{a, b, c}

90.2 ± 7.8

90.6 ± 6.7

89.4 ± 9.5

<0.001

After 15 min

98.4 ± 10.9^{a, b, c}

87.6 ± 7.8

86.7 ± 6.9

86.5 ± 7.1

<0.001

After 30 min

90.6 ± 8.7

87.7 ± 7.9

88.4 ± 8.2

87.9 ± 8.4

0.638

After 45 min

89.4 ± 8.7

86.5 ± 8.2

87.7 ± 8.4

85.8 ± 8.8

0.525

After 60 min

88.8 ± 7.6

86.7 ± 7.4

89.6 ± 8.2

85.9 ± 7.9

0.355

Aftern 75 min

92.3 ± 8.8

91.4. ± 7.8

90.1 ± 7.9

90.2 ± 7.8

0.775

After 90 min

90.7 ± 9.9

88.6 ± 8.2

87.3 ± 8.4

89.4 ± 8.6

0.631

At end of surgery

93.6 ± 7.7

90,7 ± 8.9

91.4 ± 8.4

89.4 ± 8.2

0.404