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Table 5 Reliability of muscle echo-intensity measures for the maximum region of interest in the controls (dominant and nondominant sides) and patients with low back pain (affected and unaffected sides)

From: Test-retest reliability of nerve and muscle morphometric characteristics utilizing ultrasound imaging in individuals with unilateral sciatica and controls

  Transverse scan (a.u.) Longitudinal scan (a.u.)
Mean SD ICC SEM MDC Mean SD ICC SEM MDC
Dominant
 Multifidus 64.51 15.1 0.91 4.53 12.51 66.56 23.17 0.80 10.36 28.64
 Biceps Femoris 69.28 26.81 0.93 7.08 19.58 59.07 18.56 0.82 7.86 21.73
 Medial Gastrocnemius 83.20 19.90 0.96 3.98 10.99 84.45 20.31 0.90 6.42 17.75
 Soleus 95.51 46.18 0.94 11.27 31.14 102.50 54.98 0.85 21.28 58.33
Nondominant
 Multifidus 45.29 29.37 0.92 8.29 22.91 66.50 18.37 0.89 6.07 16.80
 Biceps Femoris 81.98 20.81 0.94 5.08 14.05 86.32 30.77 0.87 11.08 30.64
 Medial Gastrocnemius 79.09 22.43 0.91 6.73 18.57 80.24 16.98 0.92 4.79 13.26
 Soleus 106.52 50.06 0.90 15.82 43.72 89.72 49.78 0.88 17.22 47.60
Affected
 Multifidus 108.19 42.37 0.94 10.34 28.58 99.08 36.48 0.82 15.47 42.77
 Biceps Femoris 73.32 39.14 0.92 11.04 30.52 78.82 40.37 0.84 16.15 44.63
 Medial Gastrocnemius 90.12 45.94 0.93 12.13 33.52 91.36 50.18 0.86 18.77 51.89
 Soleus 98.65 30.66 0.91 9.20 25.44 99.18 35.79 0.90 11.31 31.27
Unaffected
 Multifidus 101.90 35.88 0.92 10.12 27.98 106.13 44.59 0.81 19.40 53.61
 Biceps Femoris 81.12 38.33 0.92 10.81 29.89 83.48 35.77 0.83 14.74 40.75
 Medial Gastrocnemius 81.11 48.82 0.90 15.43 42.66 80.96 49.13 0.87 17.69 48.90
 Soleus 99.11 30.26 0.91 9.08 25.10 100.12 33.89 0.89 11.22 31.0
  1. ICC Intraclass correlation coefficient, SEM Standard Error of Measurement, MDC Minimal Detectable Change, a.u. arbitrary units