Table 2. Analysis of factors associated with death.

	n	Events (n)	Censored patients n (%)	Median survival (months)	95%CI		Log-rank p
					Lower limit	Upper limit
Level of carbohydrate antigen 19-9
<59 x ULN	13	11	2 (15.4)	17.5	7.2	27.8	0.212
≥59 x ULN	10	9	1 (10.0)	6.8	1.1	12.5
Normal	10	8	2 (20.0)	13.3	6.1	20.4
Pancreatic tumor site
Head	19	15	4 (21.1)	15.6	6.1	25.0	0.482
Body	6	5	1 (16.7)	7.6	0.0	22.1
Tail	8	8	0	10.2	9.2	11.3
First treatment
Surgery	2	2	0	7.6	--	--	0.337
Chemotherapy	30	25	5 (16.7)	15.6	4.0	27.1
Chemo + radiotherapy	1	1	0	9.6	--	--
Site of metastasis
Liver	20	18	2 (10)	10.2	7.2	13.2	0.197
Other	13	10	3 (23.1)	15.6	6.1	25.0
Lymphovascular invasion
Yes	2	2	0	7.6	--	--	0.286
No	31	26	5 (16.1)	15.6	6.3	24.8
Stromal reaction
No	33	28	5 (15.2)	13.3	6.3	20.2	--
Number of chemotherapy lines
Up to 2	26	22	4 (15.4)	10.2	6.2	14.2	0.013
More than 2	7	6	1 (14.3)	23.5	10.8	36.2
Age
<65	12	8	4 (33.3)	20.4	0.0	44.5	0.152
≥65	21	20	1 (4.8)	11.0	6.4	15.5
Number of metastases
Up to 2	28	23	5 (17.9)	11.0	6.2	15.8	0.961
More than 2	5	5	0	17.9	1.3	34.5

95%CI: confidence interval 95%CI; ULN: upper limit of the normal range.