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Table 2 Distribution of LSS-grade and LSS-level

From: Patient demographics and MRI-based measurements predict redundant nerve roots in lumbar spinal stenosis: a retrospective database cohort comparison

   RNR+ RNR- X2 (P-value)
LSS-grade A 0 1 (0.7) X2 (3) = 24.6 (p < 0.001)
  B 2 (1.3) 13 (8.7)  
  C 98 (65.3) 117 (78.0)  
  D 50 (33.3) 19 (12.7)  
LSS-level 1 level 102 (68.0) 127 (84.7) X2 (2) = 12.5 (p = 0.002)
  2 levels 42 (28.0) 22 (14.7)  
  3 levels 6 (4.0) 1 (0.7)  
  1. Values are frequencies (%)