Table 10 The angle β2 in the cervical intervertebral space (\(\overline{x }\)±s, °)
Level | Upper screw | Lower screw | ||
|---|---|---|---|---|
Male | Female | Male | Female | |
C3-C4 | 35.47 ± 2.12 | 35.50 ± 1.75 | 34.18 ± 1.43 | 34.23 ± 2.16 |
C4-C5 | 38.34 ± 2.34 | 38.90 ± 2.01 | 35.49 ± 1.71 | 35.18 ± 1.75 |
C5-C6 | 37.49 ± 2.62 | 37.64 ± 2.28 | 35.90 ± 2.95 | 36.43 ± 1.65 |
C6-C7 | 39.56 ± 1.42 | 38.92 ± 2.37 | 36.95 ± 1.69 | 37.20 ± 1.91 |