The impact of preoperative biliary drainage on postoperative outcomes in patients with malignant obstructive jaundice: a retrospective analysis of 290 consecutive cases at a single medical center

Table 6 Postoperative outcomes in proximal- and distal-obstruction groups

	Total	DG	PG	Statistic	P value
Proximal obstruction (number of patients)	172	82	90	χ² = 4.295	0.038
Complication(s) (number of patients)	134	70	64	χ² = 4.295	0.038
Distal obstruction	118	49	69	χ² = 1.329	0.249
Complication(s)	60	28	32	χ² = 1.329	0.249

ISSN: 1477-7819