Table 1 Predictive variables considere in the model.
Variable | Nature | Instrument/stand |
|---|---|---|
Preoperative index | ||
Age | Continuous (years) | Identification |
Sex | Dichotomous (yes/no) | Identification |
BMI < 18.5 or > 30 kg/m2 | Continuous | Height and weight |
ASA ≥ 3 | Continuous | Identification |
NYHA ≥ 3 | Continuous | Identification |
Comorbidity | ||
Hypoxemia | Dichotomous (yes/no) | Paraclinical test |
COPD | Dichotomous (yes/no) | Self-report |
Bronchial asthma | Dichotomous (yes/no) | Self-report |
Bronchiectasis | Dichotomous (yes/no) | Self-report |
History of lung surgery | Dichotomous (yes/no) | Self-report |
Respiratory failure | Dichotomous (yes/no) | Paraclinical test/self-report |
Congestive heart failure | Dichotomous (yes/no) | Paraclinical test/self-report |
Atrial fibrillation | Dichotomous (yes/no) | Paraclinical test/self-report |
Diabetes mellitus | Dichotomous (yes/no) | Paraclinical test/self-report |
Cerebrovascular accident | Dichotomous (yes/no) | Paraclinical test/self-report |
Hemiplegia | Dichotomous (yes/no) | Paraclinical test/self-report |
Dementia | Dichotomous (yes/no) | Paraclinical test/self-report |
Renal failure | Dichotomous (yes/no) | Paraclinical test/self-report |
Moderate to severe anaemia | Dichotomous (yes/no) | Paraclinical test |
Albumin concentration | Continuous (g/L) | Paraclinical test |
Time before medical transport < 4 h | Dichotomous (yes/no) | Self-report |
Prophylactic anticoagulation | Dichotomous (yes/no) | Identification |
Preoperative waiting time | Continuous (day) | Identification |
Type of fracture | ||
Femoral shaft fractures | Dichotomous (yes/no) | Identification |
Femoral neck fractures | Dichotomous (yes/no) | Identification |
Intraoperative index | ||
Type of surgery | ||
Sliding hip screw or cannulated screws | Dichotomous (yes/no) | Identification |
Arthroplasty | Dichotomous (yes/no) | Identification |
Intramedullary nail | Dichotomous (yes/no) | Identification |
Type of anaesthesia | ||
Intrathecal block | Dichotomous (yes/no) | Identification |
Intrathecal block combined with nerve block | Dichotomous (yes/no) | Identification |
General anaesthesia | Dichotomous (yes/no) | Identification |
General anaesthesia combined with nerve block | Dichotomous (yes/no) | Identification |
Intraoperative fluid volume | Continuous (mL/kg PBW) | Identification |
Intraoperative blood transfusion | Continuous (mL/kg PBW) | Identification |
Surgery duration | Continuous (count/min) | Identification |
Anaesthesia duration | Continuous count/min) | Identification |
Intraoperative hypothermia | Dichotomous (yes/no) | Identification |
Intraoperative hypotension | Dichotomous (yes/no) | Identification |
Intraoperative hypoxemia | Dichotomous (yes/no) | Identification |
Postoperative index | ||
Postoperative nausea and vomiting | Dichotomous (yes/no) | Self-report |
Postoperative intravenous opioid analgesia | Dichotomous (yes/no) | Identification |
Postoperative nerve block analgesia | Dichotomous (yes/no) | Identification |
Postoperative ambulation time | Continuous (h) | Self-report |
Postoperative ICU stay | Continuous (day) | Identification |
