Wavelet and pain rating index for inhalation anesthesia: A randomized controlled trial

Table 4 Wavelet index and pain rating index measured at 13 major time points during general anesthesia

Time points	Wavelet index, 0-100			Pain rating index, 0-100
	SBP group	WLi group	PRi group	SBP group	WLi group	PRi group
Baseline	99.4 ± 1.2	99.5 ± 1.0	99.9 ± 0.7	85.9 ± 2.8	87.1 ± 1.8	87.5 ± 2.7
Five min after tracheal intubation	44.4 ± 3.9	44.4 ± 2.2	45.3 ± 3.2	57.0 ± 5.8	59.5 ± 4.6	58.9 ± 3.4
Placement in prone position	45.3 ± 2.2	46.1 ± 2.6	45.9 ± 2.3	55.6 ± 4.0	60.4 ± 3.6a	59.2 ± 3.8a
Incision	45.5 ± 2.3	46.7 ± 2.4	46.7 ± 1.4	55.6 ± 4.3	61.5 ± 3.6a	59.5 ± 2.9a
Vertebral plate exposure	46.2 ± 2.4	48.4 ± 4.3a	48.5 ± 1.8a	56.3 ± 4.2	62.3 ± 2.6a	60.1 ± 3.9a
Placement of pedicle screws	47.5 ± 2.4	50.0 ± 4.5a	49.5 ± 2.7	56.1 ± 3.8	62.9 ± 2.3a	60.8 ± 3.9a
Spinal canal decompression	50.9 ± 4.4	55.0 ± 3.0a	53.9 ± 1.7a	60.8 ± 4.0	66.5 ± 1.8a	63.9 ± 3.2a,b
Interbody fusion	50.0 ± 4.1	52.3 ± 2.6a	51.9 ± 2.1a	59.7 ± 2.8	64.0 ± 3.6a	61.7 ± 2.3a,b
Placement of the fixed link	48.1 ± 2.9	51.5 ± 2.9a	50.7 ± 1.9a	58.8 ± 3.6	63.1 ± 3.0a	60.2 ± 2.8b
Placement of drainage tube	48.5 ± 3.2	51.8 ± 2.3a	50.2 ± 2.3a	58.1 ± 3.9	63.2 ± 3.4a	60.3 ± 3.1b
Skin closure	57.8 ± 4.9	60.0 ± 3.3	59.1 ± 1.2	65.9 ± 5.1	69.0 ± 1.8a	68.6 ± 1.8a
Placement in recovery position	83.4 ± 6.8	84.6 ± 4.3	86.4 ± 5.3	76.6 ± 5.0	78.1 ± 2.0	80.9 ± 2.7a,b
Tracheal extubation	98.3 ± 1.5	97.2 ± 2.4	98.4 ± 2.6	87.0 ± 2.7	88.0 ± 2.9	87.9 ± 2.5

Values are given as mean ± standard deviation.

^aP < 0.05 vs systolic blood pressure group.

^bP < 0.05 vs wavelet index group. PRi: Pain rating index; SBP: Systolic blood pressure; WLi: Wavelet index.