Table 1.

Characteristics of all Surveillance, Epidemiology and End Results (SEER) participants, by their stage of pancreas cancer

	Stage IA N=409	Stage IB N=757	Stage IIA N=1907	Stage IIB N=5192	Stage III N=1305	Stage IV N=3561
Age at diagnosis—median (range)	66 (30, 88)	66 (31, 89)	68 (31, 93)	66 (30, 95)	67 (31, 94)	67 (30, 95)
Age at diagnosis—mean (SD)	64.8 (11.1)	64.9 (12)	67.1 (10.6)	65.7 (10.9)	66.1 (11.5)	66.1 (12)
Race—number (%)
Black	37 (9)	88 (12)	177 (9)	462 (9)	177 (14)	494 (14)
Other	29 (7)	69 (9)	162 (8)	331 (6)	116 (9)	271 (8)
White	343 (84)	600 (79)	1568 (82)	4399 (85)	1012 (78)	2796 (79)
Sex—number (%)
Female	201 (49)	395 (52)	947 (50)	2537 (49)	654 (50)	1646 (46)
Male	208 (51)	362 (48)	960 (50)	2655 (51)	651 (50)	1915 (54)
Location—number (%)
Body	61 (15)	124 (16)	147 (8)	272 (5)	234 (18)	702 (20)
Head	248 (61)	441 (58)	1469 (77)	4421 (85)	979 (75)	1944 (55)
Tail	100 (24)	192 (25)	291 (15)	499 (10)	92 (7)	915 (26)
Grade—no. (%)
G1	174 (43)	208 (27)	254 (13)	564 (11)	197 (15)	415 (12)
G2	172 (42)	359 (47)	982 (51)	2582 (50)	517 (40)	1182 (33)
G3	56 (14)	178 (24)	629 (33)	1966 (38)	563 (43)	1826 (51)
G4	7 (2)	12 (2)	42 (2)	80 (2)	28 (2)	138 (4)
Size (cm)—median (range)	1.5 (0.5, 2)	3.2 (2.1, 15)	3 (0.7, 14)	3.3 (0.5, 15)	4 (0.5, 14)	4 (0.5, 15)
Size (cm)—number (%)
≤2cm	409 (100)	0 (0)	345 (18)	735 (14)	93 (7)	234 (7)
2–4 cm	0 (0)	535 (71)	1095 (57)	3124 (60)	594 (46)	1554 (44)
>4 cm	0 (0)	222 (29)	467 (24)	1333 (26)	618 (47)	1773 (50)
T stage—number (%)
T1	409 (100)	0 (0)	0 (0)	172 (3)	0 (0)	111 (3)
T2	0 (0)	757 (100)	0 (0)	624 (12)	0 (0)	1070 (30)
T3	0 (0)	0 (0)	1907 (100)	4396 (85)	0 (0)	1514 (43)
T4	0 (0)	0 (0)	0 (0)	0 (0)	1305 (100)	866 (24)
N stage—number (%)
N0	409 (100)	757 (100)	1907 (100)	0 (0)	751 (58)	1956 (55)
N1	0 (0)	0 (0)	0 (0)	5192 (100)	554 (42)	1605 (45)