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Table 2 Sagittal ROM of C 2-7 , implanted level and adjacent levels

From: Comparisons of three anterior cervical surgeries in treating cervical spondylotic myelopathy

  Group A Group B Group C
C2–7 ROM    
Pre-op 49.92 ± 8.17 49.13 ± 8.04 49.18 ± 7.82
Post-op 41.08 ± 4.74 44.73 ± 6.90 48.59 ± 6.80
P value < 0.001 < 0.001 0.091
Implanted level ROM    
Pre-op 8.88 ± 1.33 9.20 ± 1.26 8.91 ± 1.48
Post-op 0 7.13 ± 1.19 8.59 ± 1.68
P value < 0.001 < 0.001 0.216
Upper level ROM    
Pre-op 8.83 ± 1.83 8.87 ± 1.46 9.05 ± 1.86
Post-op 10.75 ± 1.82 9.33 ± 2.72 9.23 ± 2.52
P value < 0.001 0.543 0.728
Lower level ROM    
Pre-op 9.04 ± 1.46 8.93 ± 1.90 9.27 ± 1.75
Post-op 11.08 ± 1.56 9.80 ± 2.51 9.45 ± 2.22
P value < 0.001 0.138 0.683
  1. Means ± standard deviation.