Development and validation of a novel competing risk model for predicting survival of esophagogastric junction adenocarcinoma: a SEER population-based study and external validation

Table 1 Characteristics of two cohorts of patients with AEG

Characteristics	Training cohort (N = 1755)		Validation cohort (N = 273)
Characteristics	No. of patients	%	No. of patients	%
Race
White	1523	86.8	0	0
Black	81	4.6	0	0
Others	151	8.6	273	100
Sex
Female	373	21.2	73	26.7
Male	1382	78.8	200	73.3
Age (year)
< 60	674	38.4	154	56.4
≥ 60	1081	61.6	119	43.6
Grade
Low grade	946	53.9	223	81.6
High grade	809	46.1	50	18.4
T stage
T1	355	20.2	47	17.2
T2	227	12.9	38	13.9
T3	768	43.8	63	23.1
T4	405	23.1	125	45.8
N stage
N0	716	40.8	25	9.2
N1	391	22.2	46	16.8
N2	340	19.4	68	24.9
N3	308	17.6	134	49.1
Size (cm)
< 1.0	83	4.7	8	2.9
< 2.0	189	10.8	42	15.4
< 3.0	265	15.1	49	17.9
< 5.0	584	33.3	102	37.4
≥ 5.0	634	36.1	72	26.4
Number of examined lymph nodes
< 5	128	7.3	3	1.1
< 10	323	18.4	5	1.8
< 15	428	24.4	20	7.3
≥ 15	876	49.9	245	89.7
Follow-up time (months, median, IQR)	33 (14,79)		21 (12–40)

ISSN: 1471-230X