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Table 3 Agreement between MRI-visible nerve involvement and findings of nerve involvement detected in the physical examination and pain drawing in assessing the lumbar spine (n = 61)

From: Assessment of nerve involvement in the lumbar spine: agreement between magnetic resonance imaging, physical examination and pain drawing findings

   MRI Physical examination Pain drawing
   Visible nerve involvement Disturbed sensibility Disturbed reflex function Disturbed motor function Indicating nerve involvement
     to touch to pain       
     Agreement Agreement Agreement Agreement Agreement
Segment (nerve) Location Patients Overall McN Overall McN Overall McN Overall McN Overall McN
   no % % P % P % P % P % P
  Dichotomised findings irrespective of grade in the physical examination and pain drawing
L 3-4
(L4)
right 7 11 79 ° 70 ° 64 0.017 67 0.012 77 °
  left 5 8 74 ° 54 0.001 66 0.002 64 0.004 84 °
  bilateral 4 7 89 ° 84 ° 69 0.004 79 ° 87 °
  any 8 13 67 ° 41 0.001 61 0.007 52 0 74 °
L 4-5
(L5)
right 11 18 69 ° 67 ° 62 0.001 61 ° 49 0
  left 13 21 62 ° 54 0.036 54 0.036 56 0.002 39 0
  bilateral 6 10 89 ° 84 ° 59 0.001 70 0.031 56 0.002
  any 18 30 43 ° 41 0.011 57 0.029 46 0.005 43 0
L 5-S1
(S1)
right 4 7 82 ° 79 ° 64 0 80 ° 79 0.023
  left 7 11 74 ° 66 0.027 46 0 64 0.004 75 °
  bilateral 0 0 97 ° 93 ° 66 0 87 0.008 85 0.004
  any 11 18 62 ° 54 0.013 44 0.003 57 0.029 72 °
T11-S1 mean of any    69   54   65   56   83  
  Dichotomised findings of grade 2 or more in the physical examination and pain drawing
L 3-4
(L4)
right 7 11 89 0.016 85 ° 72 ° 85 ° 89 0.016
  left 5 8 90 ° 84 ° 74 ° 85 ° 92 °
  bilateral 4 7 93 ° 92 ° 77 ° 93 ° 93 °
  any 8 13 85 0.039 77 ° 69 ° 77 ° 87 0.008
L 4-5
(L5)
right 11 18 75 ° 75 ° 64 ° 70 ° 75 °
  left 13 21 74 0.021 69 ° 64 ° 70 ° 75 0.007
  bilateral 6 10 89 ° 89 ° 69 ° 82 ° 90 0.031
  any 18 30 61 0.023 56 ° 59 ° 59 ° 64 °
L 5-S1
(S1)
right 4 7 92 ° 90 ° 74 0.021 92 ° 90 °
  left 7 11 85 ° 85 ° 66 ° 85 ° 89 °
  bilateral 0 0 100 ° 100 ° 79 0 98 ° 98 °
  any 11 18 77 ° 75 ° 61 ° 79 ° 80 0.039
T11-S1 mean of any    87   80   72   79   90  
  1. McN = p-value for exact Mc Nemar significance probability test; T = thoracic; L = lumbar; S = sacral; ° = non significant p-value (> 0.05)