Table 3 Results of linear regression analysis of volume versus PFNA and femoral maximum von Mises stress and displacement
Parameters | Model | B | Beta | t | 95% CI | P |
|---|---|---|---|---|---|---|
The maximum von Mises stress of the intramedullary nail (Mpa) | Constant | 260.87 |  | 85.26 | (253.96, 267.81) | < 0.001 |
Volume (%) | − 49.75 | − 0.96 | − 9.62 | (− 61.45, − 38.05) | ||
The maximum displacement of the intramedullary nail (mm) | Constant | 40.95 |  | 2718.86 | (40.92, 40.99) | < 0.001 |
Volume (%) | − 4.15 | − 1.00 | − 162.79 | (− 4.20, − 4.09) | ||
The maximum von Mises stress of the helical blade (Mpa) | Constant | 236.56 |  | 275.57 | (234.61, 238.50) | < 0.001 |
Volume (%) | − 26.74 | − 0.99 | − 18.43 | (− 30.02, − 23.46) | ||
The maximum displacement of the helical blade (mm) | Constant | 41.40 |  | 2834.22 | (41.37, 41.43) | < 0.001 |
Volume (%) | − 4.16 | − 1.00 | − 168.30 | (− 4.21, − 4.10) | ||
The maximum von Mises stress of the femur (Mpa) | Constant | 454.33 |  | 64.48 | (438.39, 470.27) | < 0.05 |
Volume (%) | − 34.63 | − 0.70 | − 2.91 | (− 61.57, − 7.69) | ||
The maximum displacement of the femur (mm) | Constant | 43.28 |  | 2546.86 | (43.240, 43.32) | < 0.001 |
Volume (%) | − 4.37 | − 1.00 | − 152.11 | (− 4.43, − 4.30) |