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Table 4 Angular parameters of the cervical pedicles obtained using MD-CT reconstruction

From: Morphometric evaluation of subaxial cervical spine using multi-detector computerized tomography (MD-CT) scan: the consideration for cervical pedicle screws fixation

  PTA   PSA  
Vertebra Rt Lt p value Rt Lt p value
C3       
Overall 42.77 ± 3.20 42.47 ± 3.10 0.56 up 10.74 ± 3.01 up 10.40 ± 3.31 0.51
Male 42.21 ± 2.86 42.02 ± 3.14   up 10.62 ± 2.84 up 10.18 ± 3.30  
Female 43.32 ± 3.46 42.91 + 3.04   up 10.86 + 3.21 up 10.62 ± 3.26  
C4       
Overall 44.24 ± 3.56 44.04 ± 3.59 0.73 up 5.47 ± 3.08 up 5.18 ± 3.18 0.57
Male 43.56 ± 3.54 43.48 ± 3.37   up 5.18 ± 2.72 up 5.10 ± 3.22  
Female 44.91 ± 3.49 44.59 ± 3.75   up 5.75 ± 3.41 up 5.27 ± 3.18  
C5       
Overall 44.05 ± 3.27 43.72 ± 3.27 0.54 up 0.56 ± 2.80 dn 0.06 ± 2.57 0.16
Male 43.05 ± 2.51 42.86 ± 2.81   up 0.29 ± 2.85 dn 0.54 ± 2.67  
Female 45.05 + 3.65* 44.59 ± 3.51*   up 0.83 ± 2.76 up 0.40 ± 2.42  
C6       
Overall 42.21 ± 2.63 41.93 ± 2.46 0.51 dn 6.86 ± 3.59 dn 6.91 ± 3.81 0.94
Male 41.54 ± 2.43 41.35 ± 2.44   dn 6.70 + 3.51 dn 6.97 ± 3.69  
Female 42.89 ± 2.68 42.51 ± 2.37*   dn 7.02 ± 3.72 dn 6.86 ± 3.98  
C7       
Overall 39.04 ± 2.90 38.70 ± 2.97 0.48 dn 10.64 ± 3.86 dn 10.45 ± 3.95 0.77
Male 38.62 ± 2.80 38.27 ± 2.70   dn 10.78 ± 3.40 dn 10.81 ± 3.58  
Female 39.45 ± 2.98 39.13 ± 3.19   dn 10.51 ± 4.31 dn 10.10 ± 4.31  
  1. Data showed by means ± standard deviation (degree); p value, demonstrated the statistical difference among right and left pedicles at the representative level; gender difference is not demonstrated in all parameters except, *female significant higher than male with p < 0.05, (calculated by Unpaired t test); up, upward direction; dn, downward direction; Rt, right pedicle; Lt, left pedicle.