Outcomes and prognostic factors of patients with stage IB and IIA pancreatic cancer according to the 8th edition American Joint Committee on Cancer criteria

Table 2 Prognostic significance for overall survival by univariate analysis of variables for stage IB and IIA patients¹

Variable	Stage IB		Stage IIA
	n	Log-rank	n	Log-rank
Age (yr)
≤ 65	444	0.000	270	0.000
> 65	442		193
Gender
Male	405	0.162	221	0.002
Female	481		242
Tumor size (mm)
21-30	584	0.258
31-40	302
41-70			332	0.013
> 70			131
Primary site
Head	486	0.000	147	0.004
Body	103		62
Tail	186		164
Other	111		90
Grade
I	221	0.000	127	0.000
II	335		149
III	164		66
IV	10		7
Unknown	156		114
Race
White	694	0.148	366	0.685
Other	192		97

¹Univariate analysis was done by Kaplan-Meier method.