Analysis of demographic characteristics in 3242 young age gastric cancer patients in Korea

Table 2 Demographic and clinicopathologic features of young age GC patients n (%)

Features	Group A (n = 371)	Group B (n = 1584)	Group C (n = 1287)	Whole (n = 3242)	P-value
Age (median, yr)	26 ± 3.2	36 ± 2.8	43 ± 1.4	38 ± 5.6	NS
Sex					< 0.05
Male	144 (38.8)	798 (50.4)	805 (62.5)	1747 (53.9)
Female	227 (61.2)	786 (49.6)	482 (37.5)	1495 (46.1)
Survival (median, mo)1	29.8 ± 4.2	31.7 ± 5.3	33.2 ± 3.8	32.4 ± 3.3	NS
Tumor size (mean, cm)	5.6 ± 3.2	5.2 ± 3.8	4.9 ± 2.9	5.14 ± 4.4	NS
Number					< 0.05
Multiple	1 (0.2)	5 (0.3)	8 (0.6)	14 (0.4)
Single	370 (99.8)	1579 (99.8)	1279 (99.4)	3228 (99.6)
Site of disease					< 0.05
Antrum	71 (19.1)	442 (27.9)	617 (48.0)	1130 (34.9)
Body (lower and middle)	84 (22.6)	365 (23.0)	308 (23.9)	757 (23.3)
Upper body and cardia	140 (37.8)	428 (27.1)	218 (16.9)	786 (24.2)
Diffuse	76 (20.5)	349 (22.0)	144 (11.2)	569 (17.6)
Pathology					< 0.05
Adenocarcinoma
Male	63 (43.8)	401 (50.3)	499 (62.0)	963 (55.1)
Female	87 (38.3)	347 (44.1)	250 (51.9)	684 (45.8)
Signet ring cell carcinoma
Male	81 (56.2)	397 (49.7)	306 (38.0)	784 (44.9)
Female	140 (61.7)	439 (55.9)	232 (48.1)	811 (54.2)
Stage of disease					< 0.05
Localized to stomach	34 (9.2)	190 (12.0)	181 (14.1)	405 (12.5)
Regional metastasis2	71 (19.1)	491 (31.0)	475 (36.9)	1037 (32.0)
Distant metastasis	266 (71.7)	903 (57.0)	631 (49.0)	1800 (55.5)
Coincidence of IM					< 0.05
Male	9 (6.3)	168 (21.1)	249 (31.0)	426 (24.4)
Female	13 (5.7)	121 (15.4)	97 (20.1)	231 (15.5)
H. pylori (+)	25 (6.7)	378 (23.9)	472 (36.7)	875 (27.0)	< 0.05

¹Survival analysis was performed using the Kaplan-Meier method;

²This included node metastasis.