Table 8 The angle α2 in the cervical intervertebral space (\(\overline{x }\)±s, °)
Level | Upper screw | Lower screw | ||
|---|---|---|---|---|
Male | Female | Male | Female | |
C3-C4 | 59.46 ± 2.76 | 58.67 ± 1.15 | 58.49 ± 1.71 | 57.04 ± 2.14 |
C4-C5 | 63.32 ± 1.54 | 62.28 ± 1.05 | 61.33 ± 1.73 | 61.29 ± 1.59 |
C5-C6 | 64.91 ± 2.69 | 64.40 ± 1.41 | 62.37 ± 1.59 | 62.31 ± 1.36 |
C6-C7 | 66.76 ± 1.96 | 65.66 ± 1.81 | 65.35 ± 2.73 | 63.29 ± 1.40 |