Table 1.

Distribution of the matching variables in the two groups

Factor	Group 1 (paPD)	Group 2 (sPD)	P value
Age (years)	56 (±14.88)	59.19 (±7.99)	0.3918, NS
Sex
Male	9	9	1, NS
Female	12	12
Tumour location
Pancreatic head	11	11	1, NS
Ampulloma	6	6	1, NS
Distal choledocus	3	4	1, NS
Duodenum	1	0	1, NS
Vascular resection and reconstruction (PV/SMV)	3	3	1, NS

NS not significant