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 1 Clinical characteristics of the entire patient cohort¹n (%)

Characteristic	Entire cohort	Stage IB	Stage IIA	P value
Number of patients	1349	886	463
Age (yr), median (range)	65 (18-90)	65 (18-90)	63 (18-90)	0.000
Tumor size (mm), mean (range)	43.4 (21-540)	29.5 (21-40)	70.0 (41-540)	0.000
Gender
Male	626 (46.40)	405 (45.71)	221 (47.73)	0.480
Female	723 (53.60)	481 (54.29)	242 (52.27)
Primary site
Head	633 (46.9)	486 (54.85)	147 (31.75)	0.000
Body	165 (12.23)	103 (11.6)	62 (13.39)
Tail	350 (25.95)	186 (20.99)	164 (35.21)
Other	201 (14.90)	111 (12.53)	90 (19.44)
Grade
I	348 (25.80)	221 (24.94)	127 (27.43)	0.006
II	484 (35.88)	335 (37.81)	149 (32.18)
III	230 (17.05)	164 (18.52)	66 (14.25)
IV	17 (1.26)	10 (1.13)	7 (1.51)
Unknown	270 (20.01)	156 (17.61)	114 (24.62)
Race
White	1060 (78.58)	694 (78.33)	366 (79.05)	0.760
Other	289 (21.42)	192 (21.67)	97 (20.95)

¹Factors were compared by independent t test and χ² test for continuous and categorical variables, respectively.