Table 2.

Selected variables and the number of patients who received postoperative NS

Variable	Received post-op NS (%)	p-value
Age (yr)
< 75 vs. ≥ 75	44.2 vs. 50.4	0.081
Sex
Female vs. male	43.4 vs. 47.0	0.182
BMI (kg/m2)
Underweight (< 18.5) vs. ideal (18.5–24.9)	69.6 vs. 45.2	0.030*
Ideal (18.5–24.9) vs. overweight (≥ 25.0)	45.2 vs. 51.0	0.114
Pre-op diabetes
Yes vs. no	61.5 vs. 44.7	0.268
Pre-op cardiovascular comorbidity
Yes vs. no	49.3 vs. 42.2	0.011*
Pre-op respiratory comorbidity
Yes vs. no	53.2 vs. 44.5	0.060
Pre-op biliary stent
Yes vs. no	42.7 vs. 50.2	0.009*
Received neoadjuvant chemotherapy
Yes vs. no	34.4 vs. 46.0	0.087
Pre-op serum bilirubin (µmol/L)
< 40 vs. ≥ 40	44.1 vs. 48.3	0.154
Pre-op serum albumin (g/L)
< 36 vs. ≥ 36	50.9 vs. 43.3	0.009*
ASA grade
≤ II vs. > II	44.1 vs. 48.0	0.184
Type of PD
Classic Whipple vs. pylorus-preserving	44.1 vs. 46.7	0.376
Venous resection performed
Yes vs. no	44.1 vs. 45.7	0.702
Intra-op blood transfusion
Yes vs. no	51.2 vs. 45.0	0.166
Left theatre with a NG tube in situ
Yes vs. no	49.9 vs. 30.4	< 0.001*
Post-op pancreatic fistula
Yes vs. no	74.2 vs. 40.0	< 0.001*
Post-op bile leak
Yes vs. no	72.1 vs. 44.5	< 0.001*
Post-op gastro-jejunal leak
Yes vs. no	65.0 vs. 45.1	0.111
Post-op post-pancreatectomy haemorrhage
Yes or no	61.9 vs. 44.3	0.002*
Delayed gastric emptying
Yes vs. no	77.2 vs. 40.8	< 0.001*
Intra-abdominal collection
Yes vs. no	68.8 vs. 42.2	< 0.001*
Unplanned return to theatre
Yes vs. no	74.3 vs. 43.7	< 0.001*
30-day readmission
Yes vs. no	58.2 vs. 44.0	0.002*
90-day mortality
Yes vs. no	56.9 vs. 45.0	0.114
Commenced ACa)
Yes vs. no	43.1 vs. 49.8	0.029*

Comparisons were made using Fisher’s exact test.

NS, nutritional support; BMI, body mass index; ASA, American Society of Anesthesiologists; PD, pancreatoduodenectomy; NG, nasogastric; AC, adjuvant chemotherapy.

^a)Excluding patients who died within 90 days of PD. *Denotes statistical significance.