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Table 2 Patient Baseline of Clinical Characteristics

From: A valid model for predicting responsible nerve roots in lumbar degenerative disease with diagnostic doubt

  Clinical outcomes after 2 years
  ECOs (n = 81) NECOs (n = 25) P
Pseudoclaudication: anyb 62 15 0.13
SLR or femoral tensionb 20 8 0.51
Course of disease: yrc 3.2 ± 2.6 3.5 ± 3.1 0.64
Pain radiation: anyb 57 18 0.88
Any neurological deficit    
 Reflexes: asymmetric depresseda 32 4 0.03
 Sensory: asymmetric decreasea 43 5 0.02
Motor: asymmetric weaknessa 34 4 0.02
VAS improvement rate after SNRBa    0.01
 ≤24 % 8 7  
 25 ~ 49 % 37 9  
 50 ~ 74 % 21 3  
 ≥75 % 5 6  
ODI improvement rate after SNRBa    0.13
 ≤24 % 20 6  
 25 ~ 49 % 45 9  
 50 ~ 74 % 12 6  
 ≥75 % 4 4  
VAS score before operationa    0.01
 ≤2 12 9  
 3 ~ 5 23 8  
 5 ~ 7 27 4  
 ≥8 19 4  
ODI before operationa    0.32
 ≤24 % 25 6  
 25 ~ 49 % 33 7  
 50 ~ 74 % 18 9  
 ≥75 % 5 3  
X-ray of lumbar vertebra    
 Degenerative scoliosisbb 25 7 0.79
 Lumbar lordosis disappearb 72 19 0.19
 Degenerative lumbar instabilityb 28 6 0.32
Stenosis level    
 L1-L2a 10 4 0.74
 L2-L3a 17 4 0.78
 L3-L4b 59 15 0.22
 L4-L5a 78 17 0.02
 L5-S1b 32 4 0.03
Total number of stenosisa    0.72
 Two 13 5  
 Three 36 9  
 More than 3 32 11  
Stenosis locations    
 Central or Lateral recessb 71 18 0.11
 Neuroforamen 21 5 0.03
Stenosis severityb    0.55
 Mild 25 8  
 Moderate 35 13  
 Severe 21 4  
  1. NECO non-effective clinical outcome, VAS Visual analog scale, ODI Oswestry Disability Index, SLR single leg raise
  2. aFisher exact test; bPearson χ 2 test; cMann Whitney U test; ECO: effective clinical outcome