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Table 4 Severity of facet tropisms according to levels

From: Relationship between facet tropism and facet joint degeneration in the sub-axial cervical spine

  C2-C3 C3-C4 C4-C5 C5-C6 C6-C7 P
Tropism-T 0.005
 Symmetry (%) 137 (68.5) 165 (82.5) 163 (81.5) 159 (79.5) 157 (78.5)  
 Moderate (%) 43 (21.5) 31 (15.5) 31 (15.5) 32 (16) 33 (16.5)  
 Severe (%) 20 (10) 4 (2) 6 (3) 9 (4.5) 10 (5)  
Tropism-S 0.196
 Symmetry (%) 148 (74) 157 (78.5) 141 (70.5) 155 (77.5) 146 (73)  
 Moderate (%) 42 (21) 27 (13.5) 46 (23) 38 (19) 44 (22)  
 Severe (%) 10 (5) 16 (8) 13 (6.5) 7 (3.5) 10 (5)  
Tropism-C 0.000
 Symmetry (%) 122 (61) 155 (77.5) 157 (78.5) 162 (81) 151 (75.5)  
 Moderate (%) 51 (25.5) 35 (17.5) 37 (18.5) 30 (15) 42 (21)  
 Severe (%) 27 (13.5) 10 (5) 6 (3) 8 (4) 7 (3.5)  
  1. Tropism-T difference between right-side and left-side T-angle, Tropism-S difference between right-side and left-side S-angle, Tropism-C difference between right-side and left-side C-angle