Time

(p) group

(n = 22)

(L) group

(n = 22)

(G) group

(n = 22)

(LG) group

(n = 22)

P value

Before induction

94.5 ± 11.6

95.4 ± 12.2

94.8 ± 12.4

92.5 ± 11.9

0.868

After intubation

114.6 ± 12.7^{a, b, c}

99.2 ± 10.8

98.6 ± 11.6

96.9 ± 12.6

<0.001

After 15 min

110.6 ± 10.4^{a, b, c}

94.6 ± 9.8

93.7 ± 10.2

92.4 ± 10.3

<0.001

After 30 min

96.3 ± 10.4

95.4 ± 10.9

94.8 ± 10.7

93.8 ± 11.7

0.894

After 45 min

95.8 ± 9.6

93.7 ± 10.2

94.7 ± 10.6

92.4 ± 10.2

0.720

After 60 min

94.8 ± 12.2

92.6 ± 11.8

93.9 ± 11.7

92.6 ± 12.1

0.911

After 75 min

94.5 ± 10.8

93.8 ± 10.5

93.5 ± 11.4

91.5 ± 11.6

0.828

After 90 min

95.6 ± 9.8

92.5 ± 10.1

93.4 ± 9.6

92.4 ± 9.2

0.671

At end of surgery

95.7 ± 11.4

93.2 ± 10.8

94.6 ± 12.2

93.8 ± 12.8

0.907