Table 3.

Multivariate analysis of prognostic factors for overall survival in patients with ampullary adenocarcinoma without pancreatic invasion

	Hazard ratios	95 % confidence intervals	P-value
Age	1.042	1.000 – 1.086	0.052
Sex
Female	1
Male	1.391	0.614 – 3.151	0.429
AJCC TNM Stage			< 0.001
Stage I	1
Stage II	3.396	1.335 – 8.634	0.010
Stage III	13.483	2.449 – 74.247	0.003
Stage IV	100.752	5.462 – 1858.372	0.002
CD44s expression
Negative or weak	1
Moderate or dense	2.666	1.070 – 6.645	0.035