Safety and efficacy of metallic stent for unresectable distal malignant biliary obstruction in elderly patients

Table 1 Patient background

	< 80 yr old (Group A)	≥ 80 yr old (Group B)	P value
Number of patients	184	88
Male	105	52	NS
Female	79	36	NS
Pancreatic cancer	136	72	NS
Bile duct cancer	21	9	NS
Metastatic biliary obstruction	13	3	NS
Papilla vater cancer	6	3	NS
Gallbladder cancer	6	1	NS
Intraductal papillary mucinous carcinoma	1	0	NS
Hepatocellular carcinoma	1	0	NS
Hepatic metastasis	40	16	NS
Ascites	45	23	NS
Duodenal stent indwelling	30	10	NS
Pathological diagnosis	161	89	NS
Performance status
0	72	8	0.0000
1	7	3	NS
2	44	12	0.018
3	29	37	0.0004
4	32	28	0.0064
Chemotherapy	106	15	0.0000
Hypertension	55	52	0.0002
Hyperlipidemia	20	6	NS
Diabetes mellitus	50	31	NS
Chronic respiratory disease	25	18	NS
Cardiac disease	18	20	0.0065
Chronic liver disease	18	6	NS
Chronic renal disease	10	3	NS
Cerebrovascular disease	5	20	0.0000
Dementia	5	20	0.0000
Anticoagulant/antiplatelet	9	23	0.0270

NS: Not significant.