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Table 2 Comparison of cervical sagittal parameters between group GO and group PO

From: The change of cervical sagittal parameters plays an important role in clinical outcomes of cervical spondylotic myelopathy after multi-level anterior cervical discectomy and fusion

 Total (n = 89)Group GO (n = 54)Group PO (n = 35)t/zp
Cobb angle (°)
 Preoperative11.80 ± 9.6312.35 ± 9.7510.94 ± 9.510.7270.467
 Last follow-up15.08 ± 9.0516.48 ± 9.1812.91 ± 8.522.2460.025
 t/z6.1915.3663.120  
p< 0.001< 0.0010.002  
Cobb angle (°)3.28 ± 3.884.13 ± 4.111.97 ± 3.112.6330.008
SVA (mm)
 Preoperative23.69 ± 11.6923.52 ± 10.8923.94 ± 12.980.1660.868
 Last follow-up18.79 ± 10.7816.76 ± 9.9621.91 ± 11.392.1680.030
 t/z6.4846.3852.338  
p< 0.001< 0.0010.019  
SVA (mm)− 4.90 ± 6.30− 6.76 ± 5.41− 2.03 ± 6.572.6290.009
T1S (°)
 Preoperative23.43 ± 11.7824.69 ± 11.2924.03 ± 12.650.3320.740
 Last follow-up26.92 ± 11.9427.31 ± 11.0626.31 ± 13.320.2350.814
 t/z4.7124.6272.759  
p< 0.001< 0.0010.006  
T1S (°)2.49 ± 4.192.63 ± 4.182.29 ± 4.270.2190.826
Cranial tilt
 Preoperative5.16 ± 6.475.31 ± 6.084.91 ± 7.110.3320.740
 Last follow-up7.52 ± 6.277.80 ± 6.127.09 ± 6.560.4500.653
 t/z6.6515.8503.471  
P< 0.001< 0.0010.001  
Cranial tilt2.36 ± 2.252.48 ± 1.882.17 ± 2.740.0600.952
Cervical tilt
 Preoperative17.71 ± 6.2818.06 ± 6.1217.17 ± 6.570.5390.590
 Last follow-up17.46 ± 6.5417.87 ± 6.5616.83 ± 6.550.5450.585
 t/z1.5220.8961.291  
p0.1320.3740.205  
Cervical tilt− 0.25 ± 1.53− 0.19 ± 1.52− 0.34 ± 1.570.0670.946