Table 1 Baseline demographics of study patients

Age (years), median (IQR)

67 (50–77)

BMI (kg/m²), median (IQR)

26 (24–31)

Male, n (%)

31 (52%)

Emergency surgery, n (%)

33 (55%)

 General surgery

21 (35%):

  Upper GI

9 (15%)

  Colorectal

6 (10%)

  Other specialist general surgery

6 (10%)

 Orthopaedics

10 (17%)

 Urology

8 (13%)

 Neurosurgery

7 (12%)

 Vascular

3 (5%)

 Head & Neck

3 (5%)

 Renal Transplant

2 (3%)

 Plastics

2 (3%)

 Upper GI Endoscopy

2 (3%)

 Trauma

1 (2%)

 Cardiology

1 (2%)

 1

0 (0%)

 2

6 (10%)

 3

48 (80%)

 4

5 (8%)

 5

1 (2%)

NSQIP predicted % serious complication, mean (SD)

19.9% (11.2%)

NSQIP predicted % mortality, median (IQR)

2.8% (0.8–11.0%)