| No SSI | SSI | P-value |
---|---|---|---|
Total (n) | 5989 | 80 | Â |
Age (%) | Â | Â | 0.2650 |
 65–80 | 28.39 | 28.75 |  |
 80–90 | 46.60 | 53.75 |  |
 90+ | 25.01 | 17.5 |  |
Sex (%) | Â | Â | 0.1572 |
 Female | 68.64 | 61.25 |  |
 Male | 31.36 | 38.75 |  |
Body mass index (%) | Â | Â | 0.0019* |
 Underweight (<18.5 kg/m2) | 20.17 | 21.25 |  |
 Normal weight (18.5–29.9 kg/m2) | 69.21 | 56.25 |  |
 Overweight (30.0–34.9 kg/m2) | 7.76 | 13.75 |  |
 Obese (≥35 kg/m2) | 2.86 | 8.75 |  |
Pre-operative functional status (%) | Â | Â | 0.0029* |
 Independent in ADL | 76.29 | 60.00 |  |
 Partially/totally dependent in ADL | 23.18 | 38.75 |  |
 Unknown | 0.53 | 1.25 |  |
Bone medications (%) | Â | Â | 0.2550 |
 Yes | 30.36 | 36.25 |  |
 No | 69.64 | 63.75 |  |