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Table 3 Median and 25%-75% interquartile range of EMG activity for knee OA and healthy subjects

From: Can pain influence the proprioception and the motor behavior in subjects with mild and moderate knee osteoarthritis?

  Stair ascent Stair descent
Muscles Knee OA Healthy p value Knee OA Healthy p value
  Median Median   Median Median  
  (25-75%) (25-75%)   (25-75%) (25-75%)  
GL1* 0.11 0.11 0.69 0.09 0.10 0.74
(0.09-0.16) (0.08-0.14) (0.05-0.16) (0.04-0.11)
SO1 0.08 0.08 0.32 0.07 0.07 0.42
(0.05-0.09) (0.06-0.10) (0.04-0.10) (0.06-0.11)
TA1 0.04 0.04 0.14 0.05 0.05 0.73
(0.02-0.06) (0.04-0.07) (0.03-0.07) (0.04-0.07)
VMO1 0.02 0.02 0.98 0.03 0.03 0.57
(0.01-0.03) (0.01-0.04) (0.02-0.04) (0.02-0.06)
VML1 0.06 0.05 0.76 0.08 0.06 0.85
(0.04-0.08) (0.04-0.08) (0.05-0.11) (0.04-0.12)
VL1 0.06 0.04 0.39 0.06 0.06 0.68
(0.03-0.08) (0.03-0.06) (0.04-0.09) (0.03-0.08)
BF1 0.07 0.10 0.06 0.10 0.12 0.37
(0.05-0.11) (0.08-0.13) (0.06-0.13) (0.06-0.14)
GL2 0.20 0.16 0.11 0.48 0.32 0.05Ŧ
(0.15-0.32) (0.09-0.23) (0.35-0.82) (0.22-0.56)
SO2 0.15 0.15 0.35 0.47 0.38 0.27
(0.11-0.21) (0.08-0.16) (0.33-0.62) (0.21-0.56)
TA2 0.18 0.18 0.43 0.37 0.33 0.15
(0.16-0.21) (0.15-0.19) (0.30-0.50) (0.22-0.40)
VMO2 0.06 0.04 0.34 0.30 0.28 0.28
(0.03-0.08) (0.02-0.07) (0.25-0.38) (0.20-0.34)
VML2 0.12 0.09 0.11 0.49 0.38 0.10
(0.09-0.16) (0.07-0.11) (0.35-0.65) (0.27-0.42)
VL2 0.12 0.07 0.10 0.40 0.31 0.22
(0.06-0.19) (0.04-0.11) (0.29-0.57) (0.26-0.38)
BF2 0.16 0.15 0.67 0.53 0.37 0.32
(0.10-0.22) (0.11-0.27) (0.35-0.64) (0.30-0.67)
GL3 0.61 0.57 0.43 0.80 0.70 0.57
(0.52-1.06) (0.48-0.87) (0.48-1.17) (0.56-1.07)
SO3 0.54 0.58 0.87 0.73 0.79 0.77
(0.39-0.76) (0.47-0.63) (0.56-0.81) (0.55-0.87)
TA3 0.38 0.34 0.38 0.24 0.19 0.29
(0.26-0.62) (0.24-0.43) (0.14-0.33) (0.15-0.21)
VMO3 0.30 0.30 0.62 0.15 0.12 0.70
(0.25-0.42) (0.25-0.33) (0.10-0.24) (0.10-0.21)
VML3 0.45 0.41 0.72 0.34 0.24 0.57
(0.39-0.69) (0.40-0.73) (0.23-0.47) (0.21-0.39)
VL3 0.49 0.40 0.24 0.26 0.20 0.36
(0.35-0.65) (0.37-0.48) (0.18-0.39) (0.16-0.31)
BF3 0.56 0.59 0.33 0.40 0.36 0.35
(0.39-0.71) (0.46-0.87) (0.27-0.53) (0.33-0.61)
  1. EMG activity of the gastrocnemius lateralis (GL), soleus (SO), tibialis anterior (TA), vastus medialis oblique (VMO), vastus medialis longus (VML), vastus lateralis (VL), and biceps femoris (BF) muscles of patients with knee osteoarthritis (OA) and healthy subjects during stair ascent and descent. *Superscript numbers in each muscle indicate the phase in which EMG signals were obtained; ŦStatistical significance.