Variables | Number of cases | Survival rate (%) | Mean survival time (months) | p value | Multivariate analysis | |||
---|---|---|---|---|---|---|---|---|
5Â years | 10Â years | Â | Â | HR | 95% CI | p value | ||
Sex | ||||||||
 Female | 61 | 89.6 | 85.8 | 163.1 |  |  |  |  |
 Male | 116 | 96.9 | 84.6 | 149.9 | 0.496 |  |  | NI |
Age | ||||||||
 > 30 years | 95 | 92.8 | 83.6 | 153.4 |  |  |  |  |
 ≤ 30 years | 82 | 92.6 | 86.4 | 161.0 | 0.627 |  |  | NI |
Extra-cortical grafting | ||||||||
 Yes | 17 | 86.2 | 78.3 | 167.0 |  |  |  |  |
 No | 160 | 93.5 | 85.8 | 155.2 | 0.826 |  |  | NI |
Type of prosthesis | ||||||||
 Custom | 103 | 93.4 | 85.5 | 158.8 |  |  |  |  |
 Modular | 74 | 88.4 | NA | 84.9 | 0.675 |  |  | NI |
Diameter of prosthetic stem | ||||||||
 ≥ 13 mm | 72 | 88.8 | 74.5 | 137.7 |  |  |  |  |
 < 13 mm | 74 | 92.6 | 88.9 | 154.0 | 0.611 |  |  | NI |
Material for prosthetic stem | ||||||||
 CoCrMo | 56 | 92.9 | NA | 77.3 |  |  |  |  |
 Titanium | 117 | 92.0 | 84.3 | 157.0 | 0.698 |  |  | NI |
Type of tumor | ||||||||
 Benign | 61 | 100 | 84.6 | 152.5 |  |  |  |  |
 Malignant | 116 | 88.4 | 86.6 | 171.5 | 0.432 |  |  | NI |
Intensity of activity | ||||||||
 High | 46 | 86.7 | NA | 96.3 |  |  |  |  |
 Low | 94 | 90.3 | 63.7 | 108.9 | 0.347 |  |  | NI |
BMI | ||||||||
 ≥ 25 | 105 | 89.9 | 72.5 | 116.5 |  |  |  |  |
 < 25 | 50 | 93.0 | 88.6 | 121.3 | 0.823 |  |  | NI |
Tumor site | ||||||||
 Distal femur | 119 | 90.9 | 82.5 | 151.8 |  | 3.99 |  |  |
 Proximal tibia | 58 | 95.4 | 89.0 | 170.8 | 0.150 | 1 | (1.21, 13.16) | 0.023 |
Length of prosthetic stem | ||||||||
 ≥ 14 cm | 73 | 94.1 | 88.8 | 143.5 |  | 1 |  |  |
 < 14 cm | 75 | 82.5 | 52.9 | 121.4 | 0.059 | 2.84 | (1.13, 7.12) | 0.026 |
Length of bone resection | ||||||||
 ≥ 14 cm | 82 | 88.0 | 79.6 | 142.7 |  |  |  |  |
 < 14 cm | 89 | 95.6 | 88.3 | 166.8 | 0.046 |  |  | 0.382 |
Prosthetic motion mode | ||||||||
 Fixed hinge | 19 | 77.8 | 66.7 | 113.6 |  | 4.11 |  |  |
 Rotating hinge | 158 | 94.6 | 88.0 | 170.0 | 0.001 | 1 | (1.74, 9.70) | 0.001 |