Table 1 Parameters of S2AI screw in patients with ADS(x ± s)
| Total(40) | Male(15) | Female(25) | t value | P value | |
|---|---|---|---|---|---|
| Lateral angle(°) | 41.24 ± 3.92 | 39.47 ± 1.76 | 42.30 ± 4.48 | 2.33 | 0.025 |
| Caudal angle(°) | 27.73 ± 6.45 | 28.00 ± 6.39 | 27.56 ± 6.61 | − 0.21 | 0.838 |
| Length of trajectory(cm) | 12.00 ± 0.99 | 12.40 ± 0.83 | 11.75 ± 1.01 | − 2.07 | 0.045 |