Table 1

Patients’ baseline characteristics

Mean age at time of surgery per patient62.6 years
Female54%
Mean systolic blood pressure per patient131.0 mm Hg
Mean diastolic blood pressure per patient75.4 mm Hg
Mean BMI per patient29.6 kg/m2
BMI<18.5 kg/m2 3%
BMI≥30.0 kg/m2 46%
Smokers21%
Ex-smokers29%
Non-smokers50%
Abdominal surgery22%
Lower limb (vascular) surgery14%
Minor surgery12%
Lower limb (orthopaedic) surgery10%
Upper limb surgery9%
Skin surgery8%
Chest surgery8%
Unspecified surgery4%
Head and/or neck surgery4%
Perineal surgery3%
Lower limb (minor) surgery2%
Back surgery2%
Groin surgery1%
  • BMI, body mass index.