Table 11. Mean NSA vs position of Calcar screw.
NSA: neck shaft angle; SD: standard deviation; AP: anteroposterior
| Calcar screw position in head | Minimum NSA reconstructed | Maximum NSA reconstructed | Mean NSA reconstructed | SD |
| Inferior (AP) | 125 | 136 | 130.73 | 2.285 |
| Centre (AP) | 120 | 130 | 126.07 | 2.921 |
| Superior (AP) | 120 | 120 | 120.20 | 2.124 |