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Table 4 The amplitude of SEPs (P40-N45) at different points of time

From: Effects of dexmedetomidine on evoked potentials in spinal surgery under combined intravenous inhalation anesthesia: a randomized controlled trial

 

Group

Median(P25,P75)

Rank sum test

H

P

The amplitude of left lower limb (µV)

T1

C(n = 27)

0.79(0.41,1.44)

0.208

0.901

  

DL(n = 24)

0.72(0.40,1.80)

  

DH(n = 28)

0.86(0.41,1.42)

 

T2

C(n = 27)

0.74(0.46,1.20)

0.610

0.737

 

DL(n = 24)

0.83(0.48,1.75)

DH(n = 28)

0.84(0.47,1.72)

T3

C(n = 27)

0.86(0.50,1.25)

0.049

0.976

 

DL(n = 24)

0.81(0.45,1.86)

DH(n = 28)

0.92(0.49,1.34)

T4

C(n = 27)

0.88(0.53,1.28)

0.172

0.917

 

DL(n = 24)

0.72(0.46,1.72)

DH(n = 28)

0.86(0.50,1.59)

The amplitude of right lower limb (µV)

T1

C(n = 27)

0.99(0.50,1.63)

0.606

0.739

  

DL(n = 24)

1.02(0.51,1.72)

DH(n = 28)

0.83(0.48,1.41)

T2

C(n = 27)

0.83(0.50,1.52)

0.231

0.891

 

DL(n = 24)

0.97(0.51,1.75)

DH(n = 28)

0.95(0.57,1.62)

T3

C(n = 27)

1.14(0.56,1.49)

0.007

0.996

 

DL(n = 24)

0.96(0.54,2.09)

DH(n = 28)

0.98(0.59,1.65)

T4

C(n = 27)

0.95(0.47,1.47)

0.270

0.874

 

DL(n = 24)

1.09(0.42,1.84)

DH(n = 28)

1.00(0.53,1.45)

  1. P > 0.05, no significant difference in the three groups. Kruskal–Wallis method for nonparametric tests
  2. Abbreviation: SEPs somatosensory evoked potentials